use for-of statements to replace for and for-in

src/components/base/AccountBalanceTrendsChartBase.ts

@@ -69,9 +69,7 @@ export function useAccountBalanceTrendsChartBase(props: CommonAccountBalanceTren
         let minUnixTimeClosingBalance = 0;
         let maxUnixTimeClosingBalance = 0;
 
-        for (let i = 0; i < props.items.length; i++) {
+        for (const item of props.items) {
-            const item = props.items[i];
-
             if (item.time < minUnixTime) {
                 minUnixTime = item.time;
                 minUnixTimeOpeningBalance = item.accountOpeningBalance;
@@ -120,8 +118,7 @@ export function useAccountBalanceTrendsChartBase(props: CommonAccountBalanceTren
 
         const dayDataItemsMap: Record<number, TransactionReconciliationStatementResponseItem[]> = {};
 
-        for (let i = 0; i < props.items.length; i++) {
+        for (const dateItem of props.items) {
-            const dateItem = props.items[i];
             let dateRangeMinUnixTime = 0;
 
             if (props.dateAggregationType === ChartDateAggregationType.Year.type) {
@@ -149,8 +146,7 @@ export function useAccountBalanceTrendsChartBase(props: CommonAccountBalanceTren
         let lastMedianBalance = lastClosingBalance;
         let lastAverageBalance = lastClosingBalance;
 
-        for (let i = 0; i < allDateRanges.value.length; i++) {
+        for (const dateRange of allDateRanges.value) {
-            const dateRange = allDateRanges.value[i];
             const dataItems = dayDataItemsMap[dateRange.minUnixTime];
 
             let displayDate = '';
@@ -176,11 +172,11 @@ export function useAccountBalanceTrendsChartBase(props: CommonAccountBalanceTren
                     return data1.time - data2.time;
                 });
 
-                const openingBalance = dataItems[0].accountOpeningBalance;
+                const openingBalance = dataItems[0]!.accountOpeningBalance;
-                const closingBalance = dataItems[dataItems.length - 1].accountClosingBalance;
+                const closingBalance = dataItems[dataItems.length - 1]!.accountClosingBalance;
                 const minimumBalance = Math.min(...dataItems.map(item => item.accountClosingBalance));
                 const maximumBalance = Math.max(...dataItems.map(item => item.accountClosingBalance));
-                const medianBalance = dataItems[Math.floor(dataItems.length / 2)].accountClosingBalance;
+                const medianBalance = dataItems[Math.floor(dataItems.length / 2)]!.accountClosingBalance;
                 const averageBalance = Math.trunc(sumAmounts(dataItems.map(item => item.accountClosingBalance)) / dataItems.length);
 
                 if (props.account.isAsset) {

src/components/base/DateRangeSelectionBase.ts

@@ -56,11 +56,11 @@ export function useDateRangeSelectionBase(props: CommonDateRangeSelectionProps)
 
     const firstDayOfWeek = computed<WeekDayValue>(() => userStore.currentUserFirstDayOfWeek);
     const beginDateTime = computed<string>(() => {
-        const actualBeginUnixTime = getActualUnixTimeForStore(getUnixTimeFromLocalDatetime(dateRange.value[0]), getTimezoneOffsetMinutes(), getBrowserTimezoneOffsetMinutes());
+        const actualBeginUnixTime = getActualUnixTimeForStore(getUnixTimeFromLocalDatetime(dateRange.value[0] as Date), getTimezoneOffsetMinutes(), getBrowserTimezoneOffsetMinutes());
         return formatUnixTimeToLongDateTime(actualBeginUnixTime);
     });
     const endDateTime = computed<string>(() => {
-        const actualEndUnixTime = getActualUnixTimeForStore(getUnixTimeFromLocalDatetime(dateRange.value[1]), getTimezoneOffsetMinutes(), getBrowserTimezoneOffsetMinutes());
+        const actualEndUnixTime = getActualUnixTimeForStore(getUnixTimeFromLocalDatetime(dateRange.value[1] as Date), getTimezoneOffsetMinutes(), getBrowserTimezoneOffsetMinutes());
         return formatUnixTimeToLongDateTime(actualEndUnixTime);
     });
     const presetRanges = computed<PresetDateRange[]>(() => {

src/components/base/ItemIconBase.ts

@@ -42,11 +42,13 @@ export function useItemIconBase(props: CommonIconProps) {
             iconId = iconId.toString();
         }
 
-        if (!ALL_ACCOUNT_ICONS[iconId]) {
+        const iconInfo = ALL_ACCOUNT_ICONS[iconId];
+
+        if (!iconInfo) {
             return DEFAULT_ACCOUNT_ICON.icon;
         }
 
-        return ALL_ACCOUNT_ICONS[iconId].icon;
+        return iconInfo.icon;
     }
 
     function getCategoryIcon(iconId: string | number): string {
@@ -54,11 +56,13 @@ export function useItemIconBase(props: CommonIconProps) {
             iconId = iconId.toString();
         }
 
-        if (!ALL_CATEGORY_ICONS[iconId]) {
+        const iconInfo = ALL_CATEGORY_ICONS[iconId];
+
+        if (!iconInfo) {
             return DEFAULT_CATEGORY_ICON.icon;
         }
 
-        return ALL_CATEGORY_ICONS[iconId].icon;
+        return iconInfo.icon;
     }
 
     function getAccountIconStyle(color?: ColorValue, defaultColor?: ColorStyleValue, additionalColorAttr?: string): Record<IconItemStyleName, IconItemStyleValue> {

src/components/base/MonthRangeSelectionBase.ts

@@ -57,8 +57,8 @@ export function useMonthRangeSelectionBase(props: CommonMonthRangeSelectionProps
         maxDate
     ]);
 
-    const beginDateTime = computed<string>(() => formatUnixTimeToGregorianLikeLongYearMonth(getYearMonthFirstUnixTime(dateRange.value[0])));
+    const beginDateTime = computed<string>(() => formatUnixTimeToGregorianLikeLongYearMonth(getYearMonthFirstUnixTime(dateRange.value[0] as Year0BasedMonth)));
-    const endDateTime = computed<string>(() => formatUnixTimeToGregorianLikeLongYearMonth(getYearMonthLastUnixTime(dateRange.value[1])));
+    const endDateTime = computed<string>(() => formatUnixTimeToGregorianLikeLongYearMonth(getYearMonthLastUnixTime(dateRange.value[1] as Year0BasedMonth)));
 
     function getFinalMonthRange(): { minYearMonth: TextualYearMonth | '', maxYearMonth: TextualYearMonth | '' } | null {
         if (!dateRange.value[0] || !dateRange.value[1]) {
@@ -69,8 +69,8 @@ export function useMonthRangeSelectionBase(props: CommonMonthRangeSelectionProps
             throw new Error('Date is too early');
         }
 
-        const minYearMonth = getYearMonthStringFromYear0BasedMonthObject(dateRange.value[0]);
+        const minYearMonth = getYearMonthStringFromYear0BasedMonthObject(dateRange.value[0] as Year0BasedMonth);
-        const maxYearMonth = getYearMonthStringFromYear0BasedMonthObject(dateRange.value[1]);
+        const maxYearMonth = getYearMonthStringFromYear0BasedMonthObject(dateRange.value[1] as Year0BasedMonth);
 
         return {
             minYearMonth,

src/components/common/DateTimePicker.vue

@@ -146,7 +146,7 @@ function getDisplayYear(year: number): string {
 
 function getDisplayMonth(month: number): string {
     if (isArray(dateTime.value)) {
-        return getCalendarDisplayShortMonthFromUnixTime(getYearMonthDayDateTime(dateTime.value[0].getFullYear(), month + 1, 1).getUnixTime(), actualNumeralSystem.value);
+        return getCalendarDisplayShortMonthFromUnixTime(getYearMonthDayDateTime(dateTime.value[0]!.getFullYear(), month + 1, 1).getUnixTime(), actualNumeralSystem.value);
     } else if (dateTime.value) {
         return getCalendarDisplayShortMonthFromUnixTime(getYearMonthDayDateTime(dateTime.value.getFullYear(), month + 1, 1).getUnixTime(), actualNumeralSystem.value);
     } else {

src/components/common/MonthPicker.vue

@@ -102,7 +102,7 @@ function getDisplayYear(year: number): string {
 
 function getDisplayMonth(month: number): string {
     if (isArray(dateTime.value)) {
-        return getCalendarDisplayShortMonthFromUnixTime(getYearMonthDayDateTime(dateTime.value[0].year, month + 1, 1).getUnixTime());
+        return getCalendarDisplayShortMonthFromUnixTime(getYearMonthDayDateTime(dateTime.value[0]!.year, month + 1, 1).getUnixTime());
     } else {
         return getCalendarDisplayShortMonthFromUnixTime(getYearMonthDayDateTime(dateTime.value.year, month + 1, 1).getUnixTime());
     }

src/components/desktop/AccountBalanceTrendsChart.vue

@@ -8,11 +8,15 @@ import { useTheme } from 'vuetify';
 import type { CallbackDataParams } from 'echarts/types/dist/shared';
 
 import { useI18n } from '@/locales/helpers.ts';
-import { type CommonAccountBalanceTrendsChartProps, useAccountBalanceTrendsChartBase } from '@/components/base/AccountBalanceTrendsChartBase.ts'
+import {
+    type AccountBalanceTrendsChartItem,
+    type CommonAccountBalanceTrendsChartProps,
+    useAccountBalanceTrendsChartBase
+} from '@/components/base/AccountBalanceTrendsChartBase.ts'
 
 import { useUserStore } from '@/stores/user.ts';
 
-import type { NameValue } from '@/core/base.ts';
+import { type NameValue, itemAndIndex } from '@/core/base.ts';
 import { TextDirection } from '@/core/text.ts';
 import type { ColorStyleValue } from '@/core/color.ts';
 import { ThemeType } from '@/core/theme.ts';
@@ -83,9 +87,7 @@ const allSeries = computed<AccountBalanceTrendsChartDataItem[]>(() => {
         series.itemStyle.borderColor0 = expenseIncomeAmountColor.expenseAmountColor;
     }
 
-    for (let i = 0; i < allDataItems.value.length; i++) {
+    for (const item of allDataItems.value) {
-        const item = allDataItems.value[i];
-
         if (props.type === AccountBalanceTrendChartType.Candlestick.type) {
             series.data.push([
                 item.openingBalance,
@@ -110,13 +112,12 @@ const yAxisWidth = computed<number>(() => {
         return width;
     }
 
-    for (let i = 0; i < allSeries.value.length; i++) {
+    for (const series of allSeries.value) {
-        for (let j = 0; j < allSeries.value[i].data.length; j++) {
+        for (const data of series.data) {
-            const data = allSeries.value[i].data[j];
             let value: number;
 
             if (isArray(data)) {
-                value = data[1]; // for candlestick, use closing balance
+                value = data[1] as number; // for candlestick, use closing balance
             } else {
                 value = data as number; // for line or bar chart
             }
@@ -172,8 +173,8 @@ const chartOptions = computed<object>(() => {
             },
             formatter: (params: CallbackDataParams[]) => {
                 if (props.type === AccountBalanceTrendChartType.Candlestick.type) {
-                    const dataIndex = params[0].dataIndex;
+                    const dataIndex = params[0]!.dataIndex;
-                    const dataItem = allDataItems.value[dataIndex];
+                    const dataItem = allDataItems.value[dataIndex] as AccountBalanceTrendsChartItem;
                     const displayItems: NameValue[] = [
                         {
                             name: tt('Opening Balance'),
@@ -201,20 +202,20 @@ const chartOptions = computed<object>(() => {
                         }
                     ];
 
-                    let tooltip = `${params[0].name} ${props.legendName}<br/>`;
+                    let tooltip = `${params[0]!.name} ${props.legendName}<br/>`;
 
-                    for (let i = 0; i < displayItems.length; i++) {
+                    for (const [displayItem, index] of itemAndIndex(displayItems)) {
-                        tooltip += `<div><span class="chart-pointer" style="background-color: #${DEFAULT_CHART_COLORS[i]}"></span>`
+                        tooltip += `<div><span class="chart-pointer" style="background-color: #${DEFAULT_CHART_COLORS[index]}"></span>`
-                            + `<span>${displayItems[i].name}</span><span class="ms-5" style="float: inline-end">${displayItems[i].value}</span><br/>`
+                            + `<span>${displayItem.name}</span><span class="ms-5" style="float: inline-end">${displayItem.value}</span><br/>`
                             + `</div>`;
                     }
 
                     return tooltip;
                 } else {
-                    const amount = params[0].data as number;
+                    const amount = params[0]!.data as number;
                     const value = formatAmountToLocalizedNumeralsWithCurrency(amount, props.account.currency);
 
-                    return `${params[0].name}<br/>`
+                    return `${params[0]!.name}<br/>`
                         + '<div><span class="chart-pointer" style="background-color: #' + DEFAULT_CHART_COLORS[0] + '"></span>'
                         + `<span>${props.legendName}</span><span class="ms-5" style="float: inline-end">${value}</span><br/>`
                         + '</div>';

src/components/desktop/MonthlyTrendsChart.vue

@@ -14,6 +14,7 @@ import { type CommonMonthlyTrendsChartProps, type MonthlyTrendsBarChartClickEven
 
 import { useUserStore } from '@/stores/user.ts';
 
+import { itemAndIndex } from '@/core/base.ts';
 import { TextDirection } from '@/core/text.ts';
 import { type Year1BasedMonth, DateRangeScene } from '@/core/datetime.ts';
 import type { ColorStyleValue } from '@/core/color.ts';
@@ -100,8 +101,7 @@ const isDarkMode = computed<boolean>(() => theme.global.name.value === ThemeType
 const itemsMap = computed<Record<string, Record<string, unknown>>>(() => {
     const map: Record<string, Record<string, unknown>> = {};
 
-    for (let i = 0; i < props.items.length; i++) {
+    for (const item of props.items) {
-        const item = props.items[i];
         let id: string = '';
 
         if (props.idField && item[props.idField]) {
@@ -135,9 +135,7 @@ const itemsMap = computed<Record<string, Record<string, unknown>>>(() => {
 const allDisplayDateRanges = computed<string[]>(() => {
     const allDisplayDateRanges: string[] = [];
 
-    for (let i = 0; i < allDateRanges.value.length; i++) {
+    for (const dateRange of allDateRanges.value) {
-        const dateRange = allDateRanges.value[i];
-
         if (props.dateAggregationType === ChartDateAggregationType.Year.type) {
             allDisplayDateRanges.push(formatUnixTimeToGregorianLikeShortYear(dateRange.minUnixTime));
         } else if (props.dateAggregationType === ChartDateAggregationType.FiscalYear.type && 'year' in dateRange) {
@@ -155,9 +153,7 @@ const allDisplayDateRanges = computed<string[]>(() => {
 const allSeries = computed<MonthlyTrendsChartDataItem[]>(() => {
     const allSeries: MonthlyTrendsChartDataItem[] = [];
 
-    for (let i = 0; i < props.items.length; i++) {
+    for (const [item, index] of itemAndIndex(props.items)) {
-        const item = props.items[i];
-
         if (props.hiddenField && item[props.hiddenField]) {
             continue;
         }
@@ -165,8 +161,7 @@ const allSeries = computed<MonthlyTrendsChartDataItem[]>(() => {
         const allAmounts: number[] = [];
         const dateRangeAmountMap: Record<string, YearMonthDataItem[]> = {};
 
-        for (let j = 0; j < item.items.length; j++) {
+        for (const dataItem of item.items) {
-            const dataItem = item.items[j];
             let dateRangeKey = '';
 
             if (props.dateAggregationType === ChartDateAggregationType.Year.type) {
@@ -189,8 +184,7 @@ const allSeries = computed<MonthlyTrendsChartDataItem[]>(() => {
             dateRangeAmountMap[dateRangeKey] = dataItems;
         }
 
-        for (let j = 0; j < allDateRanges.value.length; j++) {
+        for (const dateRange of allDateRanges.value) {
-            const dateRange = allDateRanges.value[j];
             let dateRangeKey = '';
 
             if (props.dateAggregationType === ChartDateAggregationType.Year.type) {
@@ -207,9 +201,7 @@ const allSeries = computed<MonthlyTrendsChartDataItem[]>(() => {
             const dataItems = dateRangeAmountMap[dateRangeKey];
 
             if (isArray(dataItems)) {
-                for (let i = 0; i < dataItems.length; i++) {
+                for (const dataItem of dataItems) {
-                    const dataItem = dataItems[i];
-
                     if (isNumber(dataItem[props.valueField])) {
                         amount += dataItem[props.valueField] as number;
                     }
@@ -223,7 +215,7 @@ const allSeries = computed<MonthlyTrendsChartDataItem[]>(() => {
             id: (props.idField && item[props.idField]) ? item[props.idField] as string : getItemName(item[props.nameField] as string),
             name: (props.idField && item[props.idField]) ? item[props.idField] as string : getItemName(item[props.nameField] as string),
             itemStyle: {
-                color: getDisplayColor(props.colorField && item[props.colorField] ? item[props.colorField] as string : DEFAULT_CHART_COLORS[i % DEFAULT_CHART_COLORS.length]),
+                color: getDisplayColor(props.colorField && item[props.colorField] ? item[props.colorField] as string : DEFAULT_CHART_COLORS[index % DEFAULT_CHART_COLORS.length]),
             },
             selected: true,
             type: 'line',
@@ -253,10 +245,9 @@ const yAxisWidth = computed<number>(() => {
         return width;
     }
 
-    for (let i = 0; i < allSeries.value.length; i++) {
-        for (let j = 0; j < allSeries.value[i].data.length; j++) {
-            const value = allSeries.value[i].data[j];
 
+    for (const series of allSeries.value) {
+        for (const value of series.data) {
             if (value > maxValue) {
                 maxValue = value;
             }
@@ -311,12 +302,12 @@ const chartOptions = computed<object>(() => {
                 let totalAmount = 0;
                 const displayItems: MonthlyTrendsChartTooltipItem[] = [];
 
-                for (let i = 0; i < params.length; i++) {
+                for (const param of params) {
-                    const id = params[i].seriesId as string;
+                    const id = param.seriesId as string;
                     const name = itemsMap.value[id] && props.nameField && itemsMap.value[id][props.nameField] ? getItemName(itemsMap.value[id][props.nameField] as string) : id;
-                    const color = params[i].color;
+                    const color = param.color;
                     const displayOrders = itemsMap.value[id] && props.displayOrdersField && itemsMap.value[id][props.displayOrdersField] ? itemsMap.value[id][props.displayOrdersField] as number[] : [0];
-                    const amount = params[i].data as number;
+                    const amount = param.data as number;
 
                     displayItems.push({
                         name: name,
@@ -330,9 +321,7 @@ const chartOptions = computed<object>(() => {
 
                 sortStatisticsItems(displayItems, props.sortingType);
 
-                for (let i = 0; i < displayItems.length; i++) {
+                for (const item of displayItems) {
-                    const item = displayItems[i];
-
                     if (displayItems.length === 1 || item.totalAmount !== 0) {
                         const value = formatAmountToLocalizedNumeralsWithCurrency(item.totalAmount, props.defaultCurrency);
                         tooltip += '<div><span class="chart-pointer" style="background-color: ' + item.color + '"></span>';
@@ -349,7 +338,7 @@ const chartOptions = computed<object>(() => {
                         + '</div>' + tooltip;
                 }
 
-                if (params.length && params[0].name) {
+                if (params.length && params[0] && params[0].name) {
                     tooltip = `${params[0].name}<br/>` + tooltip;
                 }
 
@@ -410,9 +399,14 @@ function clickItem(e: ECElementEvent): void {
     }
 
     const id = e.seriesId as string;
-    const item = itemsMap.value[id];
+    const item = itemsMap.value[id] as Record<string, unknown>;
     const itemId = props.idField ? item[props.idField] as string : '';
     const dateRange = allDateRanges.value[e.dataIndex];
+
+    if (!dateRange) {
+        return;
+    }
+
     let minUnixTime = dateRange.minUnixTime;
     let maxUnixTime = dateRange.maxUnixTime;
 
@@ -450,16 +444,16 @@ function exportData(): { headers: string[], data: string[][] } {
 
     headers.push(tt('Date'));
 
-    for (let i = 0; i < allSeries.value.length; i++) {
+    for (const series of allSeries.value) {
-        const id = allSeries.value[i].id;
+        const id = series.id;
         const name = itemsMap.value[id] && props.nameField && itemsMap.value[id][props.nameField] ? getItemName(itemsMap.value[id][props.nameField] as string) : id;
         headers.push(name);
     }
 
-    for (let i = 0; i < allDisplayDateRanges.value.length; i++) {
+    for (const [displayDateRange, index] of itemAndIndex(allDisplayDateRanges.value)) {
         const row: string[] = [];
-        row.push(allDisplayDateRanges.value[i]);
+        row.push(displayDateRange);
-        row.push(...allSeries.value.map(item => formatAmountToWesternArabicNumeralsWithoutDigitGrouping(item.data[i])));
+        row.push(...allSeries.value.map(item => formatAmountToWesternArabicNumeralsWithoutDigitGrouping(item.data[index] ?? 0)));
         data.push(row);
     }
 

src/components/mobile/DateTimeSelectionSheet.vue

@@ -252,8 +252,8 @@ function getTimerPickerItemStyle(textualValue: string, textualCurrentValue: stri
         return '';
     }
 
-    const minValue = parseInt(values[0].value);
+    const minValue = parseInt(values[0]!.value);
-    const maxValue = parseInt(values[values.length - 1].value);
+    const maxValue = parseInt(values[values.length - 1]!.value);
     const value = parseInt(textualValue, 10);
     const currentValue = parseInt(textualCurrentValue, 10);
     let valueDiff = value - currentValue;
@@ -327,7 +327,7 @@ function scrollToSelectedItem(itemsClass: string, itemClass: string, value: stri
     }
 
     for (let i = 0; i < itemElements.length; i++) {
-        const itemElement = itemElements[i];
+        const itemElement = itemElements[i] as HTMLElement;
 
         if ('offsetHeight' in itemsElement && 'offsetTop' in itemElement && 'offsetHeight' in itemElement
             && (!itemElement.hasAttribute('data-items-index') || itemElement.getAttribute('data-items-index') === '1')

src/components/mobile/MonthlyTrendsBarChart.vue

@@ -95,6 +95,7 @@ import { type CommonMonthlyTrendsChartProps, type MonthlyTrendsBarChartClickEven
 
 import { useUserStore } from '@/stores/user.ts';
 
+import { itemAndIndex } from '@/core/base.ts';
 import { type Year1BasedMonth, type UnixTimeRange, DateRangeScene } from '@/core/datetime.ts';
 import type { ColorStyleValue } from '@/core/color.ts';
 import { ChartDateAggregationType } from '@/core/statistics.ts';
@@ -173,9 +174,7 @@ const allDisplayDataItems = computed<MonthlyTrendsBarChartData>(() => {
     const allDateRangeItemsMap: Record<string, MonthlyTrendsBarChartDataAmount[]> = {};
     const legends: TrendsBarChartLegend[] = [];
 
-    for (let i = 0; i < props.items.length; i++) {
+    for (const [item, index] of itemAndIndex(props.items)) {
-        const item = props.items[i];
-
         if (props.hiddenField && item[props.hiddenField]) {
             continue;
         }
@@ -185,7 +184,7 @@ const allDisplayDataItems = computed<MonthlyTrendsBarChartData>(() => {
         const legend: TrendsBarChartLegend = {
             id: id,
             name: (props.nameField && item[props.nameField]) ? getItemName(item[props.nameField] as string) : id,
-            color: getDisplayColor(props.colorField && item[props.colorField] ? item[props.colorField] as string : DEFAULT_CHART_COLORS[i % DEFAULT_CHART_COLORS.length]),
+            color: getDisplayColor(props.colorField && item[props.colorField] ? item[props.colorField] as string : DEFAULT_CHART_COLORS[index % DEFAULT_CHART_COLORS.length]),
             displayOrders: (props.displayOrdersField && item[props.displayOrdersField]) ? item[props.displayOrdersField] as number[] : [0]
         };
 
@@ -197,8 +196,7 @@ const allDisplayDataItems = computed<MonthlyTrendsBarChartData>(() => {
 
         const dateRangeItemMap: Record<string, MonthlyTrendsBarChartDataAmount> = {};
 
-        for (let j = 0; j < item.items.length; j++) {
+        for (const dataItem of item.items) {
-            const dataItem = item.items[j];
             let dateRangeKey = '';
 
             if (props.dateAggregationType === ChartDateAggregationType.Year.type) {
@@ -216,7 +214,7 @@ const allDisplayDataItems = computed<MonthlyTrendsBarChartData>(() => {
             }
 
             if (dateRangeItemMap[dateRangeKey]) {
-                dateRangeItemMap[dateRangeKey].totalAmount += (props.valueField && isNumber(dataItem[props.valueField])) ? dataItem[props.valueField] as number : 0;
+                dateRangeItemMap[dateRangeKey]!.totalAmount += (props.valueField && isNumber(dataItem[props.valueField])) ? dataItem[props.valueField] as number : 0;
             } else {
                 const allDataItems: MonthlyTrendsBarChartDataAmount[] = allDateRangeItemsMap[dateRangeKey] || [];
                 const finalDataItem: MonthlyTrendsBarChartDataAmount = Object.assign({}, legend, {
@@ -233,8 +231,7 @@ const allDisplayDataItems = computed<MonthlyTrendsBarChartData>(() => {
     const finalDataItems: MonthlyTrendsBarChartDataItem[] = [];
     let maxTotalAmount = 0;
 
-    for (let i = 0; i < allDateRanges.value.length; i++) {
+    for (const dateRange of allDateRanges.value) {
-        const dateRange = allDateRanges.value[i];
         let dateRangeKey = '';
 
         if (props.dateAggregationType === ChartDateAggregationType.Year.type) {
@@ -265,12 +262,12 @@ const allDisplayDataItems = computed<MonthlyTrendsBarChartData>(() => {
 
         sortStatisticsItems(dataItems, props.sortingType);
 
-        for (let j = 0; j < dataItems.length; j++) {
+        for (const dataItem of dataItems) {
-            if (dataItems[j].totalAmount > 0) {
+            if (dataItem.totalAmount > 0) {
-                totalPositiveAmount += dataItems[j].totalAmount;
+                totalPositiveAmount += dataItem.totalAmount;
             }
 
-            totalAmount += dataItems[j].totalAmount;
+            totalAmount += dataItem.totalAmount;
         }
 
         if (totalAmount > maxTotalAmount) {
@@ -289,11 +286,11 @@ const allDisplayDataItems = computed<MonthlyTrendsBarChartData>(() => {
         finalDataItems.push(finalDataItem);
     }
 
-    for (let i = 0; i < finalDataItems.length; i++) {
+    for (const finalDataItem of finalDataItems) {
-        if (maxTotalAmount > 0 && finalDataItems[i].totalAmount > 0) {
+        if (maxTotalAmount > 0 && finalDataItem.totalAmount > 0) {
-            finalDataItems[i].percent = 100.0 * finalDataItems[i].totalAmount / maxTotalAmount;
+            finalDataItem.percent = 100.0 * finalDataItem.totalAmount / maxTotalAmount;
         } else {
-            finalDataItems[i].percent = 0.0;
+            finalDataItem.percent = 0.0;
         }
     }
 
@@ -306,9 +303,7 @@ const allDisplayDataItems = computed<MonthlyTrendsBarChartData>(() => {
 function clickItem(item: MonthlyTrendsBarChartDataItem): void {
     let itemId = '';
 
-    for (let i = 0; i < props.items.length; i++) {
+    for (const item of props.items) {
-        const item = props.items[i];
-
         if (!props.hiddenField || item[props.hiddenField]) {
             continue;
         }

src/components/mobile/TransactionTagSelectionSheet.vue

@@ -143,8 +143,8 @@ const allTags = computed<TransactionTag[]>(() => {
 
 const noAvailableTag = computed<boolean>(() => {
     if (transactionTagsStore.allTransactionTags) {
-        for (let i = 0; i < transactionTagsStore.allTransactionTags.length; i++) {
+        for (const transactionTag of transactionTagsStore.allTransactionTags) {
-            if (!transactionTagsStore.allTransactionTags[i].hidden) {
+            if (!transactionTag.hidden) {
                 return false;
             }
         }

src/lib/account.ts

@@ -1,3 +1,4 @@
+import { itemAndIndex, keys, keysIfValueEquals, values } from '@/core/base.ts';
 import { AccountType, AccountCategory } from '@/core/account.ts';
 import { PARENT_ACCOUNT_CURRENCY_PLACEHOLDER } from '@/consts/currency.ts';
 import { type AccountBalance, type CategorizedAccount, type AccountCategoriesWithVisibleCount, Account } from '@/models/account.ts';
@@ -5,9 +6,7 @@ import { type AccountBalance, type CategorizedAccount, type AccountCategoriesWit
 export function getCategorizedAccountsMap(allAccounts: Account[]): Record<number, CategorizedAccount> {
     const ret: Record<number, CategorizedAccount> = {};
 
-    for (let i = 0; i < allAccounts.length; i++) {
+    for (const account of allAccounts) {
-        const account = allAccounts[i];
-
         if (!ret[account.category]) {
             const categoryInfo = AccountCategory.valueOf(account.category);
 
@@ -21,8 +20,10 @@ export function getCategorizedAccountsMap(allAccounts: Account[]): Record<number
             }
         }
 
-        if (ret[account.category]) {
+        const categorizedAccount = ret[account.category];
-            const accountList = ret[account.category].accounts;
+
+        if (categorizedAccount) {
+            const accountList = categorizedAccount.accounts;
             accountList.push(account);
         }
     }
@@ -35,15 +36,16 @@ export function getCategorizedAccounts(allAccounts: Account[]): CategorizedAccou
     const allCategories = AccountCategory.values();
     const categorizedAccounts = getCategorizedAccountsMap(allAccounts);
 
-    for (let i = 0; i < allCategories.length; i++) {
+    for (const category of allCategories) {
-        const category = allCategories[i];
-
         if (!categorizedAccounts[category.type]) {
             continue;
         }
 
         const accountCategory = categorizedAccounts[category.type];
-        ret.push(accountCategory);
+
+        if (accountCategory) {
+            ret.push(accountCategory);
+        }
     }
 
     return ret;
@@ -56,14 +58,11 @@ export function getAccountMapByName(allAccounts: Account[]): Record<string, Acco
         return ret;
     }
 
-    for (let i = 0; i < allAccounts.length; i++) {
+    for (const account of allAccounts) {
-        const account = allAccounts[i];
-
         if (account.type === AccountType.SingleAccount.type) {
             ret[account.name] = account;
         } else if (account.type === AccountType.MultiSubAccounts.type && account.subAccounts) {
-            for (let j = 0; j < account.subAccounts.length; j++) {
+            for (const subAccount of account.subAccounts) {
-                const subAccount = account.subAccounts[j];
                 ret[subAccount.name] = subAccount;
             }
         }
@@ -76,28 +75,26 @@ export function getCategorizedAccountsWithVisibleCount(categorizedAccountsMap: R
     const ret: AccountCategoriesWithVisibleCount[] = [];
     const allCategories = AccountCategory.values();
 
-    for (let i = 0; i < allCategories.length; i++) {
+    for (const accountCategory of allCategories) {
-        const accountCategory = allCategories[i];
+        const categorizedAccount = categorizedAccountsMap[accountCategory.type];
 
-        if (!categorizedAccountsMap[accountCategory.type] || !categorizedAccountsMap[accountCategory.type].accounts) {
+        if (!categorizedAccount || !categorizedAccount.accounts) {
             continue;
         }
 
-        const allAccounts = categorizedAccountsMap[accountCategory.type].accounts;
+        const allAccounts = categorizedAccount.accounts;
         const allSubAccounts: Record<string, Account[]> = {};
         const allVisibleSubAccountCounts: Record<string, number> = {};
         const allFirstVisibleSubAccountIndexes: Record<string, number> = {};
         let allVisibleAccountCount = 0;
         let firstVisibleAccountIndex = -1;
 
-        for (let j = 0; j < allAccounts.length; j++) {
+        for (const [account, accountIndex] of itemAndIndex(allAccounts)) {
-            const account = allAccounts[j];
-
             if (!account.hidden) {
                 allVisibleAccountCount++;
 
                 if (firstVisibleAccountIndex === -1) {
-                    firstVisibleAccountIndex = j;
+                    firstVisibleAccountIndex = accountIndex;
                 }
             }
 
@@ -105,14 +102,12 @@ export function getCategorizedAccountsWithVisibleCount(categorizedAccountsMap: R
                 let visibleSubAccountCount = 0;
                 let firstVisibleSubAccountIndex = -1;
 
-                for (let k = 0; k < account.subAccounts.length; k++) {
+                for (const [subAccount, subAccountIndex] of itemAndIndex(account.subAccounts)) {
-                    const subAccount = account.subAccounts[k];
-
                     if (!subAccount.hidden) {
                         visibleSubAccountCount++;
 
                         if (firstVisibleSubAccountIndex === -1) {
-                            firstVisibleSubAccountIndex = k;
+                            firstVisibleSubAccountIndex = subAccountIndex;
                         }
                     }
                 }
@@ -147,16 +142,14 @@ export function getAllFilteredAccountsBalance(categorizedAccounts: Record<number
     const allAccountCategories = AccountCategory.values();
     const ret: AccountBalance[] = [];
 
-    for (let categoryIdx = 0; categoryIdx < allAccountCategories.length; categoryIdx++) {
+    for (const accountCategory of allAccountCategories) {
-        const accountCategory = allAccountCategories[categoryIdx];
+        const categorizedAccount = categorizedAccounts[accountCategory.type];
 
-        if (!categorizedAccounts[accountCategory.type] || !categorizedAccounts[accountCategory.type].accounts) {
+        if (!categorizedAccount || !categorizedAccount.accounts) {
             continue;
         }
 
-        for (let accountIdx = 0; accountIdx < categorizedAccounts[accountCategory.type].accounts.length; accountIdx++) {
+        for (const account of categorizedAccount.accounts) {
-            const account = categorizedAccounts[accountCategory.type].accounts[accountIdx];
-
             if (account.hidden || !accountFilter(account)) {
                 continue;
             }
@@ -169,9 +162,7 @@ export function getAllFilteredAccountsBalance(categorizedAccounts: Record<number
                     currency: account.currency
                 });
             } else if (account.type === AccountType.MultiSubAccounts.type && account.subAccounts) {
-                for (let subAccountIdx = 0; subAccountIdx < account.subAccounts.length; subAccountIdx++) {
+                for (const subAccount of account.subAccounts) {
-                    const subAccount = account.subAccounts[subAccountIdx];
-
                     if (subAccount.hidden || !accountFilter(subAccount)) {
                         continue;
                     }
@@ -197,13 +188,7 @@ export function getFinalAccountIdsByFilteredAccountIds(allAccountsMap: Record<st
         return finalAccountIds;
     }
 
-    for (const accountId in allAccountsMap) {
+    for (const account of values(allAccountsMap)) {
-        if (!Object.prototype.hasOwnProperty.call(allAccountsMap, accountId)) {
-            continue;
-        }
-
-        const account = allAccountsMap[accountId];
-
         if (filteredAccountIds && !isAccountOrSubAccountsAllChecked(account, filteredAccountIds)) {
             continue;
         }
@@ -225,13 +210,13 @@ export function getUnifiedSelectedAccountsCurrencyOrDefaultCurrency(allAccountsM
 
     let accountCurrency = '';
 
-    for (const accountId in selectedAccountIds) {
+    for (const accountId of keysIfValueEquals(selectedAccountIds, true)) {
-        if (!Object.prototype.hasOwnProperty.call(selectedAccountIds, accountId)) {
+        const account = allAccountsMap[accountId];
+
+        if (!account) {
             continue;
         }
 
-        const account = allAccountsMap[accountId];
-
         if (account.currency === PARENT_ACCOUNT_CURRENCY_PLACEHOLDER) {
             continue;
         }
@@ -258,19 +243,14 @@ export function selectAccountOrSubAccounts(filterAccountIds: Record<string, bool
             return;
         }
 
-        for (let i = 0; i < account.subAccounts.length; i++) {
+        for (const subAccount of account.subAccounts) {
-            const subAccount = account.subAccounts[i];
             filterAccountIds[subAccount.id] = value;
         }
     }
 }
 
 export function selectAll(filterAccountIds: Record<string, boolean>, allAccountsMap: Record<string, Account>, skipHiddenAccount: boolean): void {
-    for (const accountId in filterAccountIds) {
+    for (const accountId of keys(filterAccountIds)) {
-        if (!Object.prototype.hasOwnProperty.call(filterAccountIds, accountId)) {
-            continue;
-        }
-
         const account = allAccountsMap[accountId];
 
         if (skipHiddenAccount && account && account.hidden) {
@@ -284,11 +264,7 @@ export function selectAll(filterAccountIds: Record<string, boolean>, allAccounts
 }
 
 export function selectNone(filterAccountIds: Record<string, boolean>, allAccountsMap: Record<string, Account>, skipHiddenAccount: boolean): void {
-    for (const accountId in filterAccountIds) {
+    for (const accountId of keys(filterAccountIds)) {
-        if (!Object.prototype.hasOwnProperty.call(filterAccountIds, accountId)) {
-            continue;
-        }
-
         const account = allAccountsMap[accountId];
 
         if (skipHiddenAccount && account && account.hidden) {
@@ -302,11 +278,7 @@ export function selectNone(filterAccountIds: Record<string, boolean>, allAccount
 }
 
 export function selectInvert(filterAccountIds: Record<string, boolean>, allAccountsMap: Record<string, Account>, skipHiddenAccount: boolean): void {
-    for (const accountId in filterAccountIds) {
+    for (const accountId of keys(filterAccountIds)) {
-        if (!Object.prototype.hasOwnProperty.call(filterAccountIds, accountId)) {
-            continue;
-        }
-
         const account = allAccountsMap[accountId];
 
         if (skipHiddenAccount && account && account.hidden) {
@@ -324,8 +296,7 @@ export function isAccountOrSubAccountsAllChecked(account: Account, filterAccount
         return !filterAccountIds[account.id];
     }
 
-    for (let i = 0; i < account.subAccounts.length; i++) {
+    for (const subAccount of account.subAccounts) {
-        const subAccount = account.subAccounts[i];
         if (filterAccountIds[subAccount.id]) {
             return false;
         }
@@ -341,8 +312,7 @@ export function isAccountOrSubAccountsHasButNotAllChecked(account: Account, filt
 
     let checkedCount = 0;
 
-    for (let i = 0; i < account.subAccounts.length; i++) {
+    for (const subAccount of account.subAccounts) {
-        const subAccount = account.subAccounts[i];
         if (!filterAccountIds[subAccount.id]) {
             checkedCount++;
         }

src/lib/color.ts

@@ -20,8 +20,8 @@ export function getColorsInRows(allColorValues: ColorValue[], itemPerRow: number
             ret[++rowCount] = [];
         }
 
-        ret[rowCount].push({
+        ret[rowCount]!.push({
-            color: allColorValues[i]
+            color: allColorValues[i] as ColorValue
         });
     }
 

src/lib/evaluator.ts

@@ -4,12 +4,15 @@ import { replaceAll } from './common.ts';
 
 import logger from './logger.ts';
 
+type Operator = '+' | '-' | '*' | '/';
+type OperatorAndParenthesis = Operator | '(' | ')';
+
 const maxAllowedDecimalCount = 6;
 const normalizeFactor: number = 1000000;
 const normalizedDecimalsMaxZeroString: string = '000000';
 const normalizedNumberToAmountFactor: number = 10000; // 1000000 / 100
 
-const operatorPriority: Record<string, number> = {
+const operatorPriority: Record<Operator, number> = {
     '+': 1,
     '-': 1,
     '*': 2,
@@ -48,20 +51,20 @@ function checkNumberRange(num: number): void {
 
 function toPostfixExprTokens(expr: string): string[] | null {
     const finalTokens: string[] = [];
-    const operatorStack: string[] = [];
+    const operatorStack: OperatorAndParenthesis[] = [];
     let currentNumberBuilder = '';
     let isLastTokenOperator = true;
 
     expr = replaceAll(expr, ' ', '');
 
     for (let i = 0; i < expr.length; i++) {
-        const ch = expr[i];
+        const ch = expr[i] as string;
 
         // number
         if ('0' <= ch && ch <= '9' || ch === '.') {
             currentNumberBuilder += ch;
             continue
-        } else if (ch === '-' && i + 1 < expr.length && '0' <= expr[i + 1] && expr[i + 1] <= '9' && currentNumberBuilder.length === 0 && isLastTokenOperator) {
+        } else if (ch === '-' && i + 1 < expr.length && '0' <= (expr[i + 1] as string) && (expr[i + 1] as string) <= '9' && currentNumberBuilder.length === 0 && isLastTokenOperator) {
             currentNumberBuilder += ch;
             continue
         }
@@ -84,13 +87,15 @@ function toPostfixExprTokens(expr: string): string[] | null {
                 }
 
                 while (operatorStack.length > 0) {
-                    const topOperator = operatorStack[operatorStack.length - 1];
+                    const topOperator = operatorStack[operatorStack.length - 1] as OperatorAndParenthesis;
 
                     if (topOperator === '(') {
                         break;
                     }
 
-                    if (operatorPriority[topOperator] >= operatorPriority[ch]) {
+                    const isCurrentOperator = topOperator === '+' || topOperator === '-' || topOperator === '*' || topOperator === '/';
+
+                    if (isCurrentOperator && operatorPriority[topOperator] >= operatorPriority[ch]) {
                         finalTokens.push(topOperator);
                         operatorStack.pop();
                     } else {
@@ -154,7 +159,7 @@ function evaluatePostfixExpr(tokens: string[]): number | null {
     const stack: number[] = [];
 
     for (let i = 0; i < tokens.length; i++) {
-        const token = tokens[i];
+        const token = tokens[i] as string;
 
         switch (token) {
             case '+':
@@ -211,7 +216,7 @@ function evaluatePostfixExpr(tokens: string[]): number | null {
         return null;
     }
 
-    return stack[0];
+    return stack[0] as number;
 }
 export function evaluateExpressionToAmount(expr: string): number | undefined {
     if (!expr) {

src/lib/numeral.ts

@@ -13,8 +13,8 @@ import { isDefined, isString, isNumber, replaceAll, removeAll } from './common.t
 export function sumAmounts(amounts: number[]): number {
     let sum = 0;
 
-    for (let i = 0; i < amounts.length; i++) {
+    for (const amount of amounts) {
-        sum += amounts[i];
+        sum += amount;
     }
 
     return sum;
@@ -292,7 +292,7 @@ export function formatExchangeRateAmount(exchangeRateAmount: number, options: Nu
     }
 }
 
-export function getAdaptiveDisplayAmountRate(amount1: number, amount2: number, fromExchangeRate: { rate: string }, toExchangeRate: { rate: string }, options: NumberFormatOptions): string | null {
+export function getAdaptiveDisplayAmountRate(amount1: number, amount2: number, options: NumberFormatOptions, fromExchangeRate?: { rate: string }, toExchangeRate?: { rate: string }): string | null {
     const numeralSystem = options.numeralSystem || NumeralSystem.Default;
 
     if (!amount1 || !amount2 || amount1 === amount2) {

src/lib/settings.ts

@@ -1,3 +1,5 @@
+import { keys } from '@/core/base.ts';
+
 import type {
     ApplicationSettingKey,
     ApplicationSettingValue,
@@ -28,11 +30,7 @@ function getStoredApplicationSettings(): BaseApplicationSetting {
 export function getApplicationSettings(): ApplicationSettings {
     const storedApplicationSettings = getStoredApplicationSettings();
 
-    for (const key in storedApplicationSettings) {
+    for (const key of keys(storedApplicationSettings)) {
-        if (!Object.prototype.hasOwnProperty.call(storedApplicationSettings, key)) {
-            continue;
-        }
-
         if (typeof(DEFAULT_APPLICATION_SETTINGS[key]) === 'object') {
             storedApplicationSettings[key] = Object.assign({}, DEFAULT_APPLICATION_SETTINGS[key], storedApplicationSettings[key]);
         }

src/lib/tag.ts

@@ -1,8 +1,9 @@
+import { reversed } from '@/core/base.ts';
 import { TransactionTag } from '@/models/transaction_tag.ts';
 
 export function isNoAvailableTag(tags: TransactionTag[], showHidden: boolean): boolean {
-    for (let i = 0; i < tags.length; i++) {
+    for (const tag of tags) {
-        if (showHidden || !tags[i].hidden) {
+        if (showHidden || !tag.hidden) {
             return false;
         }
     }
@@ -13,8 +14,8 @@ export function isNoAvailableTag(tags: TransactionTag[], showHidden: boolean): b
 export function getAvailableTagCount(tags: TransactionTag[], showHidden: boolean): number {
     let count = 0;
 
-    for (let i = 0; i < tags.length; i++) {
+    for (const tag of tags) {
-        if (showHidden || !tags[i].hidden) {
+        if (showHidden || !tag.hidden) {
             count++;
         }
     }
@@ -23,9 +24,9 @@ export function getAvailableTagCount(tags: TransactionTag[], showHidden: boolean
 }
 
 export function getFirstShowingId(tags: TransactionTag[], showHidden: boolean): string | null {
-    for (let i = 0; i < tags.length; i++) {
+    for (const tag of tags) {
-        if (showHidden || !tags[i].hidden) {
+        if (showHidden || !tag.hidden) {
-            return tags[i].id;
+            return tag.id;
         }
     }
 
@@ -33,9 +34,9 @@ export function getFirstShowingId(tags: TransactionTag[], showHidden: boolean):
 }
 
 export function getLastShowingId(tags: TransactionTag[], showHidden: boolean): string | null {
-    for (let i = tags.length - 1; i >= 0; i--) {
+    for (const tag of reversed(tags)) {
-        if (showHidden || !tags[i].hidden) {
+        if (showHidden || !tag.hidden) {
-            return tags[i].id;
+            return tag.id;
         }
     }
 

src/lib/template.ts

@@ -1,8 +1,9 @@
+import { reversed } from '@/core/base.ts';
 import { TransactionTemplate } from '@/models/transaction_template.ts';
 
 export function isNoAvailableTemplate(templates: TransactionTemplate[], showHidden: boolean): boolean {
-    for (let i = 0; i < templates.length; i++) {
+    for (const template of templates) {
-        if (showHidden || !templates[i].hidden) {
+        if (showHidden || !template.hidden) {
             return false;
         }
     }
@@ -13,8 +14,8 @@ export function isNoAvailableTemplate(templates: TransactionTemplate[], showHidd
 export function getAvailableTemplateCount(templates: TransactionTemplate[], showHidden: boolean): number {
     let count = 0;
 
-    for (let i = 0; i < templates.length; i++) {
+    for (const template of templates) {
-        if (showHidden || !templates[i].hidden) {
+        if (showHidden || !template.hidden) {
             count++;
         }
     }
@@ -23,9 +24,9 @@ export function getAvailableTemplateCount(templates: TransactionTemplate[], show
 }
 
 export function getFirstShowingId(templates: TransactionTemplate[], showHidden: boolean): string | null {
-    for (let i = 0; i < templates.length; i++) {
+    for (const template of templates) {
-        if (showHidden || !templates[i].hidden) {
+        if (showHidden || !template.hidden) {
-            return templates[i].id;
+            return template.id;
         }
     }
 
@@ -33,9 +34,9 @@ export function getFirstShowingId(templates: TransactionTemplate[], showHidden:
 }
 
 export function getLastShowingId(templates: TransactionTemplate[], showHidden: boolean): string | null {
-    for (let i = templates.length - 1; i >= 0; i--) {
+    for (const template of reversed(templates)) {
-        if (showHidden || !templates[i].hidden) {
+        if (showHidden || !template.hidden) {
-            return templates[i].id;
+            return template.id;
         }
     }
 

src/lib/transaction.ts

@@ -39,7 +39,7 @@ export function setTransactionModelByTransaction(transaction: Transaction, trans
     }
 
     if (!options.type && options.categoryId && options.categoryId !== '0' && allCategoriesMap[options.categoryId]) {
-        const category = allCategoriesMap[options.categoryId];
+        const category = allCategoriesMap[options.categoryId] as TransactionCategory;
         const type = categoryTypeToTransactionType(category.type);
 
         if (isNumber(type)) {
@@ -102,8 +102,8 @@ export function setTransactionModelByTransaction(transaction: Transaction, trans
 
     if (allVisibleAccounts.length) {
         if (options.accountId && options.accountId !== '0') {
-            for (let i = 0; i < allVisibleAccounts.length; i++) {
+            for (const account of allVisibleAccounts) {
-                if (allVisibleAccounts[i].id === options.accountId) {
+                if (account.id === options.accountId) {
                     transaction.sourceAccountId = options.accountId;
                     transaction.destinationAccountId = options.accountId;
                     break;
@@ -115,7 +115,7 @@ export function setTransactionModelByTransaction(transaction: Transaction, trans
             if (defaultAccountId && allAccountsMap[defaultAccountId] && !allAccountsMap[defaultAccountId].hidden) {
                 transaction.sourceAccountId = defaultAccountId;
             } else {
-                transaction.sourceAccountId = allVisibleAccounts[0].id;
+                transaction.sourceAccountId = allVisibleAccounts[0]!.id;
             }
         }
 
@@ -123,7 +123,7 @@ export function setTransactionModelByTransaction(transaction: Transaction, trans
             if (defaultAccountId && allAccountsMap[defaultAccountId] && !allAccountsMap[defaultAccountId].hidden) {
                 transaction.destinationAccountId = defaultAccountId;
             } else {
-                transaction.destinationAccountId = allVisibleAccounts[0].id;
+                transaction.destinationAccountId = allVisibleAccounts[0]!.id;
             }
         }
     }
@@ -132,8 +132,7 @@ export function setTransactionModelByTransaction(transaction: Transaction, trans
         const tagIds = options.tagIds.split(',');
         const finalTagIds = [];
 
-        for (let i = 0; i < tagIds.length; i++) {
+        for (const tagId of tagIds) {
-            const tagId = tagIds[i];
             const tag = allTagsMap[tagId];
 
             if (tag && !tag.hidden) {

src/locales/helpers.ts

@@ -21,6 +21,11 @@ import {
     DEFAULT_CONTENT as PERSIAN_CALENDAR_DEFAULT_CONTENT
 } from '@/locales/calendar/persian/index.ts';
 
+import {
+    entries,
+    keys
+} from '@/core/base.ts';
+
 import {
     TextDirection
 } from '@/core/text.ts';
@@ -257,12 +262,7 @@ export function getI18nOptions(): object {
         messages: (function () {
             const messages: Record<string, object> = {};
 
-            for (const languageKey in ALL_LANGUAGES) {
+            for (const [languageKey, languageInfo] of entries(ALL_LANGUAGES)) {
-                if (!Object.prototype.hasOwnProperty.call(ALL_LANGUAGES, languageKey)) {
-                    continue;
-                }
-
-                const languageInfo = ALL_LANGUAGES[languageKey];
                 messages[languageKey] = languageInfo.content;
             }
 
@@ -274,13 +274,7 @@ export function getI18nOptions(): object {
 export function getRtlLocales(): Record<string, boolean> {
     const rtlLocales: Record<string, boolean> = {};
 
-    for (const languageKey in ALL_LANGUAGES) {
+    for (const [languageKey, languageInfo] of entries(ALL_LANGUAGES)) {
-        if (!Object.prototype.hasOwnProperty.call(ALL_LANGUAGES, languageKey)) {
-            continue;
-        }
-
-        const languageInfo = ALL_LANGUAGES[languageKey];
-
         if (languageInfo.textDirection === 'rtl') {
             rtlLocales[languageKey] = true;
         }
@@ -346,7 +340,7 @@ export function useI18n() {
 
         // fallback to use marco language tag
         if (languageTagParts.length > 1) {
-            browserLanguage = languageTagParts[0];
+            browserLanguage = languageTagParts[0] as string;
 
             // try to match marco language tag with full language tag in i18n file
             if (ALL_LANGUAGES[browserLanguage]) {
@@ -373,24 +367,19 @@ export function useI18n() {
     }
 
     function getLanguageKeyFromLanguageAlias(alias: string): string | null {
-        for (const languageKey in ALL_LANGUAGES) {
+        for (const [languageKey, languageInfo] of entries(ALL_LANGUAGES)) {
-            if (!Object.prototype.hasOwnProperty.call(ALL_LANGUAGES, languageKey)) {
-                continue;
-            }
-
             if (languageKey.toLowerCase() === alias.toLowerCase()) {
                 return languageKey;
             }
 
-            const langInfo = ALL_LANGUAGES[languageKey];
+            const aliases = languageInfo.aliases;
-            const aliases = langInfo.aliases;
 
             if (!aliases || aliases.length < 1) {
                 continue;
             }
 
-            for (let i = 0; i < aliases.length; i++) {
+            for (const aliasName of aliases) {
-                if (aliases[i].toLowerCase() === alias.toLowerCase()) {
+                if (aliasName.toLowerCase() === alias.toLowerCase()) {
                     return languageKey;
                 }
             }
@@ -400,16 +389,12 @@ export function useI18n() {
     }
 
     function getLanguageKeyFromMarcoLanguageTag(languageTag: string): string | null {
-        for (const languageKey in ALL_LANGUAGES) {
+        for (const languageKey of keys(ALL_LANGUAGES)) {
-            if (!Object.prototype.hasOwnProperty.call(ALL_LANGUAGES, languageKey)) {
-                continue;
-            }
-
             if (languageKey.indexOf('-') < 0) {
                 continue;
             }
 
-            const marcoLanguageTag = languageKey.split('-')[0];
+            const marcoLanguageTag = languageKey.split('-')[0] as string;
 
             if (marcoLanguageTag.toLowerCase() === languageTag.toLowerCase()) {
                 return languageKey;
@@ -422,7 +407,7 @@ export function useI18n() {
     function getLocalizedError(error: ErrorResponse): LocalizedError {
         if (error.errorCode === KnownErrorCode.ApiNotFound && SPECIFIED_API_NOT_FOUND_ERRORS[error.path]) {
             return {
-                message: `${SPECIFIED_API_NOT_FOUND_ERRORS[error.path].message}`
+                message: `${SPECIFIED_API_NOT_FOUND_ERRORS[error.path]!.message}`
             };
         }
 
@@ -432,8 +417,7 @@ export function useI18n() {
             };
         }
 
-        for (let i = 0; i < PARAMETERIZED_ERRORS.length; i++) {
+        for (const errorInfo of PARAMETERIZED_ERRORS) {
-            const errorInfo = PARAMETERIZED_ERRORS[i];
             const matches = error.errorMessage.match(errorInfo.regex);
 
             if (matches && matches.length === errorInfo.parameters.length + 1) {
@@ -443,7 +427,7 @@ export function useI18n() {
                         return {
                             key: param.field,
                             localized: param.localized,
-                            value: matches[index + 1]
+                            value: matches[index + 1] as string
                         }
                     })
                 };
@@ -459,9 +443,7 @@ export function useI18n() {
         const localizedParameters: Record<string, string> = {};
 
         if (parameters) {
-            for (let i = 0; i < parameters.length; i++) {
+            for (const parameter of parameters) {
-                const parameter = parameters[i];
-
                 if (parameter.localized) {
                     localizedParameters[parameter.key] = t(`parameter.${parameter.value}`);
                 } else {
@@ -520,8 +502,7 @@ export function useI18n() {
 
         const allCurrencyDisplayTypes = CurrencyDisplayType.values();
 
-        for (let i = 0; i < allCurrencyDisplayTypes.length; i++) {
+        for (const type of allCurrencyDisplayTypes) {
-            const type = allCurrencyDisplayTypes[i];
             const sampleValue = getFormattedAmountWithCurrency(12345, defaultCurrency, type, numeralSystem, decimalSeparator);
             const displayName = `${t(type.name)} (${sampleValue})`
 
@@ -534,7 +515,7 @@ export function useI18n() {
         return ret;
     }
 
-    function getAllLocalizedCalendarTypes(allTypeAndNameArray: CalendarDisplayType[] | DateDisplayType[], localeDefaultType: CalendarDisplayType | DateDisplayType | undefined, systemDefaultType: CalendarDisplayType | DateDisplayType, languageDefaultValue: number): TypeAndDisplayName[] {
+    function getAllLocalizedCalendarTypes(allCalendarDisplayTypeArray: CalendarDisplayType[] | DateDisplayType[], localeDefaultType: CalendarDisplayType | DateDisplayType | undefined, systemDefaultType: CalendarDisplayType | DateDisplayType, languageDefaultValue: number): TypeAndDisplayName[] {
         let defaultType: TypeAndName | undefined = localeDefaultType;
 
         if (!defaultType) {
@@ -548,12 +529,10 @@ export function useI18n() {
             displayName: `${t('Language Default')} (${t('calendar.' + defaultType.name)})`
         });
 
-        for (let i = 0; i < allTypeAndNameArray.length; i++) {
+        for (const calendarDisplayType of allCalendarDisplayTypeArray) {
-            const type = allTypeAndNameArray[i];
-
             ret.push({
-                type: type.type,
+                type: calendarDisplayType.type,
-                displayName: t('calendar.' + type.name)
+                displayName: t('calendar.' + calendarDisplayType.name)
             });
         }
 
@@ -563,12 +542,10 @@ export function useI18n() {
     function getLocalizedDisplayNameAndType(typeAndNames: TypeAndName[]): TypeAndDisplayName[] {
         const ret: TypeAndDisplayName[] = [];
 
-        for (let i = 0; i < typeAndNames.length; i++) {
+        for (const typeAndName of typeAndNames) {
-            const nameAndType = typeAndNames[i];
-
             ret.push({
-                type: nameAndType.type,
+                type: typeAndName.type,
-                displayName: t(nameAndType.name)
+                displayName: t(typeAndName.name)
             });
         }
 
@@ -583,12 +560,10 @@ export function useI18n() {
             displayName: t('System Default') + (defaultType.name ? ` (${t(defaultType.name)})` : '')
         });
 
-        for (let i = 0; i < typeAndNames.length; i++) {
+        for (const typeAndName of typeAndNames) {
-            const nameAndType = typeAndNames[i];
-
             ret.push({
-                type: nameAndType.type,
+                type: typeAndName.type,
-                displayName: t(nameAndType.name)
+                displayName: t(typeAndName.name)
             });
         }
 
@@ -610,13 +585,11 @@ export function useI18n() {
             displayName: `${t('Language Default')} (${defaultSeparatorType.symbol})`
         });
 
-        for (let i = 0; i < allSeparatorArray.length; i++) {
+        for (const separator of allSeparatorArray) {
-            const type = allSeparatorArray[i];
-
             ret.push({
-                type: type.type,
+                type: separator.type,
-                symbol: type.symbol,
+                symbol: separator.symbol,
-                displayName: `${t('numeral.' + type.name)} (${type.symbol})`
+                displayName: `${t('numeral.' + separator.name)} (${separator.symbol})`
             });
         }
 
@@ -627,9 +600,7 @@ export function useI18n() {
         const ret: TypeAndDisplayName[] = [];
         const allTypes: ChartDateAggregationType[] = ChartDateAggregationType.values();
 
-        for (let i = 0; i < allTypes.length; i++) {
+        for (const type of allTypes) {
-            const type = allTypes[i];
-
             ret.push({
                 type: type.type,
                 displayName: t(fullName ? type.fullName : `granularity.${type.shortName}`)
@@ -643,8 +614,7 @@ export function useI18n() {
         const ret = [];
         const allMonths = Month.values();
 
-        for (let i = 0; i < allMonths.length; i++) {
+        for (const month of allMonths) {
-            const month = allMonths[i];
             ret.push(t(`datetime.${month.name}.${type}`));
         }
 
@@ -655,8 +625,7 @@ export function useI18n() {
         const ret = [];
         const allWeekDays = WeekDay.values();
 
-        for (let i = 0; i < allWeekDays.length; i++) {
+        for (const weekDay of allWeekDays) {
-            const weekDay = allWeekDays[i];
             ret.push(t(`datetime.${weekDay.name}.${type}`));
         }
 
@@ -952,17 +921,12 @@ export function useI18n() {
     function getAllLanguageOptions(includeSystemDefault: boolean): LanguageOption[] {
         const ret: LanguageOption[] = [];
 
-        for (const languageTag in ALL_LANGUAGES) {
+        for (const [languageKey, languageInfo] of entries(ALL_LANGUAGES)) {
-            if (!Object.prototype.hasOwnProperty.call(ALL_LANGUAGES, languageTag)) {
-                continue;
-            }
-
-            const languageInfo = ALL_LANGUAGES[languageTag];
             const displayName = languageInfo.displayName;
             const languageNameInCurrentLanguage = getLanguageDisplayName(languageInfo.name);
 
             ret.push({
-                languageTag: languageTag,
+                languageTag: languageKey,
                 displayName: languageNameInCurrentLanguage,
                 nativeDisplayName: displayName
             });
@@ -996,11 +960,7 @@ export function useI18n() {
     function getAllCurrencies(): LocalizedCurrencyInfo[] {
         const allCurrencies: LocalizedCurrencyInfo[] = [];
 
-        for (const currencyCode in ALL_CURRENCIES) {
+        for (const currencyCode of keys(ALL_CURRENCIES)) {
-            if (!Object.prototype.hasOwnProperty.call(ALL_CURRENCIES, currencyCode)) {
-                continue;
-            }
-
             const localizedCurrencyInfo: LocalizedCurrencyInfo = {
                 currencyCode: currencyCode,
                 displayName: getCurrencyName(currencyCode)
@@ -1020,9 +980,7 @@ export function useI18n() {
         const allMeridiemIndicators = MeridiemIndicator.values();
         const localizedMeridiemIndicatorNames = [];
 
-        for (let i = 0; i < allMeridiemIndicators.length; i++) {
+        for (const indicator of allMeridiemIndicators) {
-            const indicator = allMeridiemIndicators[i];
-
             localizedMeridiemIndicatorNames.push({
                 name: t(`datetime.${indicator.name}.content`),
                 value: indicator.name
@@ -1061,7 +1019,7 @@ export function useI18n() {
         }
 
         for (let i = firstDayOfWeek; i < allWeekDays.length; i++) {
-            const weekDay = allWeekDays[i];
+            const weekDay = allWeekDays[i] as WeekDay;
 
             ret.push({
                 type: weekDay.type,
@@ -1070,7 +1028,7 @@ export function useI18n() {
         }
 
         for (let i = 0; i < firstDayOfWeek; i++) {
-            const weekDay = allWeekDays[i];
+            const weekDay = allWeekDays[i] as WeekDay;
 
             ret.push({
                 type: weekDay.type,
@@ -1092,8 +1050,7 @@ export function useI18n() {
             displayName: `${t('Language Default')} (${formatCurrentTime(defaultFormat, dateTimeFormatOptions)})`
         });
 
-        for (let i = 0; i < allFormatArray.length; i++) {
+        for (const formatType of allFormatArray) {
-            const formatType = allFormatArray[i];
             const format = t(`format.${type}.${formatType.key}`);
 
             ret.push({
@@ -1110,9 +1067,7 @@ export function useI18n() {
         const ret: LocalizedDateRange[] = [];
         const allDateRanges = DateRange.values();
 
-        for (let i = 0; i < allDateRanges.length; i++) {
+        for (const dateRange of allDateRanges) {
-            const dateRange = allDateRanges[i];
-
             if (!dateRange.isAvailableForScene(scene)) {
                 continue;
             }
@@ -1158,9 +1113,7 @@ export function useI18n() {
             });
         }
 
-        for (let i = 0; i < recentDateRanges.length; i++) {
+        for (const recentDateRange of recentDateRanges) {
-            const recentDateRange = recentDateRanges[i];
-
             allRecentMonthDateRanges.push({
                 dateType: recentDateRange.dateType,
                 minTime: recentDateRange.minTime,
@@ -1190,14 +1143,14 @@ export function useI18n() {
         const defaultTimezoneOffsetMinutes = getBrowserTimezoneOffsetMinutes();
         const allTimezoneInfos: LocalizedTimezoneInfo[] = [];
 
-        for (let i = 0; i < ALL_TIMEZONES.length; i++) {
+        for (const timezoneInfo of ALL_TIMEZONES) {
-            const utcOffset = (ALL_TIMEZONES[i].timezoneName !== UTC_TIMEZONE.timezoneName ? numeralSystem.replaceWesternArabicDigitsToLocalizedDigits(getTimezoneOffset(ALL_TIMEZONES[i].timezoneName)) : '');
+            const utcOffset = (timezoneInfo.timezoneName !== UTC_TIMEZONE.timezoneName ? numeralSystem.replaceWesternArabicDigitsToLocalizedDigits(getTimezoneOffset(timezoneInfo.timezoneName)) : '');
-            const displayName = t(`timezone.${ALL_TIMEZONES[i].displayName}`);
+            const displayName = t(`timezone.${timezoneInfo.displayName}`);
 
             allTimezoneInfos.push({
-                name: ALL_TIMEZONES[i].timezoneName,
+                name: timezoneInfo.timezoneName,
                 utcOffset: utcOffset,
-                utcOffsetMinutes: getTimezoneOffsetMinutes(ALL_TIMEZONES[i].timezoneName),
+                utcOffsetMinutes: getTimezoneOffsetMinutes(timezoneInfo.timezoneName),
                 displayName: displayName,
                 displayNameWithUtcOffset: `(UTC${utcOffset}) ${displayName}`
             });
@@ -1269,9 +1222,7 @@ export function useI18n() {
 
         const allFiscalYearFormats = FiscalYearFormat.values();
 
-        for (let i = 0; i < allFiscalYearFormats.length; i++) {
+        for (const fiscalYearFormat of allFiscalYearFormats) {
-            const fiscalYearFormat = allFiscalYearFormats[i];
-
             ret.push({
                 type: fiscalYearFormat.type,
                 displayName: formatTimeRangeToGregorianLikeFiscalYearFormat(fiscalYearFormat, currentFiscalYearRange, numeralSystem, calendarType),
@@ -1298,9 +1249,7 @@ export function useI18n() {
 
         const allNumeralSystemTypes = NumeralSystem.values();
 
-        for (let i = 0; i < allNumeralSystemTypes.length; i++) {
+        for (const type of allNumeralSystemTypes) {
-            const type = allNumeralSystemTypes[i];
-
             ret.push({
                 type: type.type,
                 displayName: `${t('numeral.' + type.name)} (${type.textualAllDigits})`
@@ -1329,8 +1278,7 @@ export function useI18n() {
         const allDigitGroupingTypes = DigitGroupingType.values();
         const numberCharacters = numeralSystem.replaceWesternArabicDigitsToLocalizedDigits('123456789').split('');
 
-        for (let i = 0; i < allDigitGroupingTypes.length; i++) {
+        for (const type of allDigitGroupingTypes) {
-            const type = allDigitGroupingTypes[i];
             const sampleValue = type.format(numberCharacters, digitGroupingSymbol);
 
             ret.push({
@@ -1364,9 +1312,7 @@ export function useI18n() {
 
         const allPresetAmountColors = PresetAmountColor.values();
 
-        for (let i = 0; i < allPresetAmountColors.length; i++) {
+        for (const amountColor of allPresetAmountColors) {
-            const amountColor = allPresetAmountColors[i];
-
             ret.push({
                 type: amountColor.type,
                 displayName: t('color.amount.' + amountColor.name)
@@ -1380,9 +1326,7 @@ export function useI18n() {
         const ret: LocalizedAccountCategory[] = [];
         const allCategories = AccountCategory.values();
 
-        for (let i = 0; i < allCategories.length; i++) {
+        for (const accountCategory of allCategories) {
-            const accountCategory = allCategories[i];
-
             ret.push({
                 type: accountCategory.type,
                 displayName: t(accountCategory.name),
@@ -1403,9 +1347,8 @@ export function useI18n() {
             categoryTypes.push(categoryType);
         }
 
-        for (let i = 0; i < categoryTypes.length; i++) {
+        for (const categoryType of categoryTypes) {
             const categories: LocalizedPresetCategory[] = [];
-            const categoryType = categoryTypes[i];
             let defaultCategories: PresetCategory[] = [];
 
             if (categoryType === CategoryType.Income) {
@@ -1416,9 +1359,7 @@ export function useI18n() {
                 defaultCategories = DEFAULT_TRANSFER_CATEGORIES;
             }
 
-            for (let j = 0; j < defaultCategories.length; j++) {
+            for (const category of defaultCategories) {
-                const category = defaultCategories[j];
-
                 const submitCategory: LocalizedPresetCategory = {
                     name: t('category.' + category.name, {}, { locale: locale }),
                     type: categoryType,
@@ -1427,8 +1368,7 @@ export function useI18n() {
                     subCategories: []
                 };
 
-                for (let k = 0; k < category.subCategories.length; k++) {
+                for (const subCategory of category.subCategories) {
-                    const subCategory = category.subCategories[k];
                     const submitSubCategory: LocalizedPresetSubCategory = {
                         name: t('category.' + subCategory.name, {}, { locale: locale }),
                         type: categoryType,
@@ -1455,9 +1395,7 @@ export function useI18n() {
             return availableExchangeRates;
         }
 
-        for (let i = 0; i < exchangeRatesData.exchangeRates.length; i++) {
+        for (const exchangeRate of exchangeRatesData.exchangeRates) {
-            const exchangeRate = exchangeRatesData.exchangeRates[i];
-
             availableExchangeRates.push({
                 currencyCode: exchangeRate.currency,
                 currencyDisplayName: getCurrencyName(exchangeRate.currency),
@@ -1494,16 +1432,13 @@ export function useI18n() {
     function getAllSupportedImportFileCagtegoryAndTypes(): LocalizedImportFileCategoryAndTypes[] {
         const allSupportedImportFileCategoryAndTypes: LocalizedImportFileCategoryAndTypes[] = [];
 
-        for (let i = 0; i < SUPPORTED_IMPORT_FILE_CATEGORY_AND_TYPES.length; i++) {
+        for (const categoryAndTypes of SUPPORTED_IMPORT_FILE_CATEGORY_AND_TYPES) {
-            const categoryAndTypes = SUPPORTED_IMPORT_FILE_CATEGORY_AND_TYPES[i];
-
             const localizedCategoryAndTypes: LocalizedImportFileCategoryAndTypes = {
                 displayCategoryName: t(categoryAndTypes.categoryName),
                 fileTypes: []
             };
 
-            for (let j = 0; j < categoryAndTypes.fileTypes.length; j++) {
+            for (const fileType of categoryAndTypes.fileTypes) {
-                const fileType = categoryAndTypes.fileTypes[j];
                 let document: LocalizedImportFileDocument | undefined;
 
                 if (fileType.document) {
@@ -1517,7 +1452,7 @@ export function useI18n() {
                         if (SUPPORTED_DOCUMENT_LANGUAGES_FOR_IMPORT_FILE[documentLanguage] === documentLanguage) {
                             documentAnchor = t(`document.anchor.export_and_import.${fileType.document.anchor}`);
                         } else if (SUPPORTED_DOCUMENT_LANGUAGES_FOR_IMPORT_FILE[documentLanguage]) {
-                            documentLanguage = SUPPORTED_DOCUMENT_LANGUAGES_FOR_IMPORT_FILE[documentLanguage];
+                            documentLanguage = SUPPORTED_DOCUMENT_LANGUAGES_FOR_IMPORT_FILE[documentLanguage] as string;
                             documentAnchor = t(`document.anchor.export_and_import.${fileType.document.anchor}`, {}, { locale: documentLanguage });
                         } else {
                             documentLanguage = DEFAULT_DOCUMENT_LANGUAGE_FOR_IMPORT_FILE;
@@ -1528,8 +1463,8 @@ export function useI18n() {
                         documentAnchor = fileType.document.anchor;
                     }
 
-                    if (documentLanguage && documentLanguage !== getCurrentLanguageTag()) {
+                    if (documentLanguage && documentLanguage !== getCurrentLanguageTag() && ALL_LANGUAGES[documentLanguage]) {
-                        documentDisplayLanguageName = getLanguageDisplayName(ALL_LANGUAGES[documentLanguage].name);
+                        documentDisplayLanguageName = getLanguageDisplayName((ALL_LANGUAGES[documentLanguage] as LanguageInfo).name);
                     }
 
                     if (documentLanguage) {
@@ -1556,8 +1491,7 @@ export function useI18n() {
                 const subTypes: LocalizedImportFileTypeSubType[] = [];
 
                 if (fileType.subTypes) {
-                    for (let k = 0; k < fileType.subTypes.length; k++) {
+                    for (const subType of fileType.subTypes) {
-                        const subType = fileType.subTypes[k];
                         const localizedSubType: LocalizedImportFileTypeSubType = {
                             type: subType.type,
                             displayName: t(subType.name),
@@ -1571,8 +1505,7 @@ export function useI18n() {
                 const supportedEncodings: LocalizedImportFileTypeSupportedEncodings[] = [];
 
                 if (fileType.supportedEncodings) {
-                    for (let k = 0; k < fileType.supportedEncodings.length; k++) {
+                    for (const encoding of fileType.supportedEncodings) {
-                        const encoding = fileType.supportedEncodings[k];
                         const localizedEncoding: LocalizedImportFileTypeSupportedEncodings = {
                             encoding: encoding,
                             displayName: t(`encoding.${encoding}`)
@@ -1638,7 +1571,7 @@ export function useI18n() {
 
         if (monthDays.length === 1) {
             return t('format.misc.monthDay', {
-                ordinal: getMonthdayOrdinal(monthDays[0])
+                ordinal: getMonthdayOrdinal(monthDays[0] as number)
             });
         } else {
             return t('format.misc.monthDays', {
@@ -1657,16 +1590,14 @@ export function useI18n() {
             firstDayOfWeek = WeekDay.DefaultFirstDay.type;
         }
 
-        for (let i = 0; i < weekdayTypes.length; i++) {
+        for (const weekdayType of weekdayTypes) {
-            weekdayTypesMap[weekdayTypes[i]] = true;
+            weekdayTypesMap[weekdayType] = true;
         }
 
         const allWeekDays = getAllWeekDays(firstDayOfWeek);
         const finalWeekdayNames = [];
 
-        for (let i = 0; i < allWeekDays.length; i++) {
+        for (const weekDay of allWeekDays) {
-            const weekDay = allWeekDays[i];
-
             if (weekdayTypesMap[weekDay.type]) {
                 finalWeekdayNames.push(weekDay.displayName);
             }
@@ -1894,9 +1825,7 @@ export function useI18n() {
         const dateTimeFormatOptions = getDateTimeFormatOptions();
         const gregorianLikeDateTimeFormatOptions = getDateTimeFormatOptions({ calendarType: gregorianLikeCalendarType });
 
-        for (let i = 0; i < allDateRanges.length; i++) {
+        for (const dateRange of allDateRanges) {
-            const dateRange = allDateRanges[i];
-
             if (dateRange && dateRange.type !== DateRange.Custom.type && dateRange.type === dateType && dateRange.name) {
                 return t(dateRange.name);
             }
@@ -1984,8 +1913,7 @@ export function useI18n() {
 
             const ret: CalendarAlternateDate[] = [];
 
-            for (let i = 0; i < chineseDates.length; i++) {
+            for (const chineseDate of chineseDates) {
-                const chineseDate = chineseDates[i];
                 const alternateDate = getChineseCalendarAlternateDisplayDate(chineseDate);
                 ret.push(alternateDate);
             }
@@ -2117,11 +2045,9 @@ export function useI18n() {
         return formatExchangeRateAmount(value, numberFormatOptions);
     }
 
-    function getAdaptiveAmountRate(amount1: number, amount2: number, fromExchangeRate: {
+    function getAdaptiveAmountRate(amount1: number, amount2: number, fromExchangeRate?: { rate: string }, toExchangeRate?: { rate: string }): string | null {
-        rate: string
-    }, toExchangeRate: { rate: string }): string | null {
         const numberFormatOptions = getNumberFormatOptions({});
-        return getAdaptiveDisplayAmountRate(amount1, amount2, fromExchangeRate, toExchangeRate, numberFormatOptions);
+        return getAdaptiveDisplayAmountRate(amount1, amount2, numberFormatOptions, fromExchangeRate, toExchangeRate);
     }
 
     function getAmountPrependAndAppendText(currencyCode: string, isPlural: boolean): CurrencyPrependAndAppendText | null {
@@ -2137,19 +2063,17 @@ export function useI18n() {
         const allCategories = AccountCategory.values();
         const categorizedAccounts: Record<number, CategorizedAccount> = getCategorizedAccountsMap(Account.cloneAccounts(allVisibleAccounts));
 
-        for (let i = 0; i < allCategories.length; i++) {
+        for (const category of allCategories) {
-            const category = allCategories[i];
+            const accountCategory = categorizedAccounts[category.type];
 
-            if (!categorizedAccounts[category.type]) {
+            if (!accountCategory) {
                 continue;
             }
 
-            const accountCategory = categorizedAccounts[category.type];
             const accountsWithDisplayBalance: AccountWithDisplayBalance[] = [];
 
             if (accountCategory.accounts) {
-                for (let i = 0; i < accountCategory.accounts.length; i++) {
+                for (const account of accountCategory.accounts) {
-                    const account = accountCategory.accounts[i];
                     let accountWithDisplaceBalance: AccountWithDisplayBalance;
 
                     if (showAccountBalance && account.isAsset) {
@@ -2171,24 +2095,24 @@ export function useI18n() {
                 let totalBalance = 0;
                 let hasUnCalculatedAmount = false;
 
-                for (let i = 0; i < accountsBalance.length; i++) {
+                for (const accountBalance of accountsBalance) {
-                    if (accountsBalance[i].currency === defaultCurrency) {
+                    if (accountBalance.currency === defaultCurrency) {
-                        if (accountsBalance[i].isAsset) {
+                        if (accountBalance.isAsset) {
-                            totalBalance += accountsBalance[i].balance;
+                            totalBalance += accountBalance.balance;
-                        } else if (accountsBalance[i].isLiability) {
+                        } else if (accountBalance.isLiability) {
-                            totalBalance -= accountsBalance[i].balance;
+                            totalBalance -= accountBalance.balance;
                         }
                     } else {
-                        const balance = exchangeRatesStore.getExchangedAmount(accountsBalance[i].balance, accountsBalance[i].currency, defaultCurrency);
+                        const balance = exchangeRatesStore.getExchangedAmount(accountBalance.balance, accountBalance.currency, defaultCurrency);
 
                         if (!isNumber(balance)) {
                             hasUnCalculatedAmount = true;
                             continue;
                         }
 
-                        if (accountsBalance[i].isAsset) {
+                        if (accountBalance.isAsset) {
                             totalBalance += Math.trunc(balance);
-                        } else if (accountsBalance[i].isLiability) {
+                        } else if (accountBalance.isLiability) {
                             totalBalance -= Math.trunc(balance);
                         }
                     }

src/models/account.ts

@@ -108,7 +108,7 @@ export class Account implements AccountInfoResponse {
             }
 
             for (let i = 0; i < this.subAccounts.length; i++) {
-                if (!this.subAccounts[i].equals(other.subAccounts[i])) {
+                if (!(this.subAccounts[i] as Account).equals(other.subAccounts[i] as Account)) {
                     return false;
                 }
             }
@@ -137,9 +137,9 @@ export class Account implements AccountInfoResponse {
     public setSuitableIcon(oldCategory: number, newCategory: number): void {
         const allCategories = AccountCategory.values();
 
-        for (let i = 0; i < allCategories.length; i++) {
+        for (const category of allCategories) {
-            if (allCategories[i].type === oldCategory) {
+            if (category.type === oldCategory) {
-                if (this.icon !== allCategories[i].defaultAccountIconId) {
+                if (this.icon !== category.defaultAccountIconId) {
                     return;
                 } else {
                     break;
@@ -147,9 +147,9 @@ export class Account implements AccountInfoResponse {
             }
         }
 
-        for (let i = 0; i < allCategories.length; i++) {
+        for (const category of allCategories) {
-            if (allCategories[i].type === newCategory) {
+            if (category.type === newCategory) {
-                this.icon = allCategories[i].defaultAccountIconId;
+                this.icon = category.defaultAccountIconId;
             }
         }
     }
@@ -231,9 +231,7 @@ export class Account implements AccountInfoResponse {
                 return null;
             }
 
-            for (let i = 0; i < this.subAccounts.length; i++) {
+            for (const subAccount of this.subAccounts) {
-                const subAccount = this.subAccounts[i];
-
                 if (subAccountId && subAccountId === subAccount.id) {
                     return subAccount.id;
                 }
@@ -255,9 +253,7 @@ export class Account implements AccountInfoResponse {
                 return false;
             }
 
-            for (let i = 0; i < this.subAccounts.length; i++) {
+            for (const subAccount of this.subAccounts) {
-                const subAccount = this.subAccounts[i];
-
                 if (subAccountId && subAccountId === subAccount.id) {
                     return subAccount.hidden;
                 }
@@ -279,9 +275,7 @@ export class Account implements AccountInfoResponse {
                 return null;
             }
 
-            for (let i = 0; i < this.subAccounts.length; i++) {
+            for (const subAccount of this.subAccounts) {
-                const subAccount = this.subAccounts[i];
-
                 if (subAccountId && subAccountId === subAccount.id) {
                     return subAccount.comment;
                 }
@@ -303,9 +297,7 @@ export class Account implements AccountInfoResponse {
                 return null;
             }
 
-            for (let i = 0; i < this.subAccounts.length; i++) {
+            for (const subAccount of this.subAccounts) {
-                const subAccount = this.subAccounts[i];
-
                 if (subAccountId && subAccountId === subAccount.id) {
                     return subAccount;
                 }
@@ -322,9 +314,7 @@ export class Account implements AccountInfoResponse {
             return null;
         }
 
-        for (let i = 0; i < this.subAccounts.length; i++) {
+        for (const subAccount of this.subAccounts) {
-            const subAccount = this.subAccounts[i];
-
             if (subAccountId && subAccountId === subAccount.id) {
                 return subAccount;
             }
@@ -341,9 +331,7 @@ export class Account implements AccountInfoResponse {
         const subAccountCurrenciesMap: Record<string, boolean> = {};
         const subAccountCurrencies: string[] = [];
 
-        for (let i = 0; i < this.subAccounts.length; i++) {
+        for (const subAccount of this.subAccounts) {
-            const subAccount = this.subAccounts[i];
-
             if (!showHidden && subAccount.hidden) {
                 continue;
             }
@@ -508,7 +496,7 @@ export class Account implements AccountInfoResponse {
 
             if (account1.parentId && account1.parentId !== '0') {
                 if (allAccountsMap && allAccountsMap[account1.parentId]) {
-                    account1DisplayOrder = allAccountsMap[account1.parentId].displayOrder;
+                    account1DisplayOrder = (allAccountsMap[account1.parentId] as Account).displayOrder;
                 } else {
                     account1DisplayOrder = null;
                 }
@@ -516,7 +504,7 @@ export class Account implements AccountInfoResponse {
 
             if (account2.parentId && account2.parentId !== '0') {
                 if (allAccountsMap && allAccountsMap[account2.parentId]) {
-                    account2DisplayOrder = allAccountsMap[account2.parentId].displayOrder;
+                    account2DisplayOrder = (allAccountsMap[account2.parentId] as Account).displayOrder;
                 } else {
                     account2DisplayOrder = null;
                 }

src/models/transaction.ts

@@ -1,4 +1,4 @@
-import type { PartialRecord } from '@/core/base.ts';
+import { type PartialRecord, itemAndIndex } from '@/core/base.ts';
 import type { Year1BasedMonth, TextualYearMonthDay, StartEndTime, WeekDay } from '@/core/datetime.ts';
 import { type Coordinate, getNormalizedCoordinate } from '@/core/coordinate.ts';
 import { TransactionType } from '@/core/transaction.ts';
@@ -185,9 +185,9 @@ export class Transaction implements TransactionInfoResponse {
             return;
         }
 
-        for (let i = 0; i < this._pictures.length; i++) {
+        for (const [picture, index] of itemAndIndex(this._pictures)) {
-            if (this._pictures[i].pictureId === pictureInfo.pictureId) {
+            if (picture.pictureId === pictureInfo.pictureId) {
-                this._pictures.splice(i, 1);
+                this._pictures.splice(index, 1);
             }
         }
     }

src/models/transaction_category.ts

@@ -1,3 +1,4 @@
+import { entries } from '@/core/base.ts';
 import type { ColorValue } from '@/core/color.ts';
 import { CategoryType } from '@/core/category.ts';
 import { DEFAULT_CATEGORY_ICON_ID } from '@/consts/icon.ts';
@@ -58,7 +59,7 @@ export class TransactionCategory implements TransactionCategoryInfoResponse {
             }
 
             for (let i = 0; i < this.subCategories.length; i++) {
-                if (!this.subCategories[i].equals(other.subCategories[i])) {
+                if (!(this.subCategories[i] as TransactionCategory).equals(other.subCategories[i] as TransactionCategory)) {
                     return false;
                 }
             }
@@ -132,12 +133,8 @@ export class TransactionCategory implements TransactionCategoryInfoResponse {
     public static ofMap(categoriesByType: Record<number, TransactionCategoryInfoResponse[]>): Record<number, TransactionCategory[]> {
         const ret: Record<number, TransactionCategory[]> = {};
 
-        for (const categoryType in categoriesByType) {
+        for (const [categoryType, categories] of entries(categoriesByType)) {
-            if (!Object.prototype.hasOwnProperty.call(categoriesByType, categoryType)) {
+            ret[parseInt(categoryType)] = TransactionCategory.ofMulti(categories);
-                continue;
-            }
-
-            ret[categoryType] = TransactionCategory.ofMulti(categoriesByType[categoryType]);
         }
 
         return ret;

src/stores/exchangeRates.ts

@@ -1,7 +1,7 @@
 import { ref, computed } from 'vue';
 import { defineStore } from 'pinia';
 
-import type { BeforeResolveFunction } from '@/core/base.ts';
+import { type BeforeResolveFunction, itemAndIndex } from '@/core/base.ts';
 
 import type {
     UserCustomExchangeRateUpdateResponse,
@@ -65,15 +65,14 @@ export const useExchangeRatesStore = defineStore('exchangeRates', () => {
             return exchangeRateMap;
         }
 
-        for (let i = 0; i < latestExchangeRates.value.data.exchangeRates.length; i++) {
+        for (const exchangeRate of latestExchangeRates.value.data.exchangeRates) {
-            const exchangeRate = latestExchangeRates.value.data.exchangeRates[i];
             exchangeRateMap[exchangeRate.currency] = exchangeRate;
         }
 
         return exchangeRateMap;
     });
 
-    function updateExchangeRateToLatestExchangeRateList(exchangeRate: LatestExchangeRate, updateTime: number): void {
+    function updateExchangeRateToLatestExchangeRateList(latestExchangeRate: LatestExchangeRate, updateTime: number): void {
         if (!latestExchangeRates.value || !latestExchangeRates.value.data || !latestExchangeRates.value.data.exchangeRates) {
             return;
         }
@@ -81,16 +80,16 @@ export const useExchangeRatesStore = defineStore('exchangeRates', () => {
         const exchangeRates = latestExchangeRates.value.data.exchangeRates;
         let changed = false;
 
-        for (let i = 0; i < exchangeRates.length; i++) {
+        for (const [exchangeRate, index] of itemAndIndex(exchangeRates)) {
-            if (exchangeRates[i].currency === exchangeRate.currency) {
+            if (exchangeRate.currency === latestExchangeRate.currency) {
-                exchangeRates.splice(i, 1, exchangeRate);
+                exchangeRates.splice(index, 1, latestExchangeRate);
                 changed = true;
                 break;
             }
         }
 
         if (!changed) {
-            exchangeRates.push(exchangeRate);
+            exchangeRates.push(latestExchangeRate);
             changed = true;
         }
 
@@ -109,9 +108,9 @@ export const useExchangeRatesStore = defineStore('exchangeRates', () => {
         const exchangeRates = latestExchangeRates.value.data.exchangeRates;
         let changed = false;
 
-        for (let i = 0; i < exchangeRates.length; i++) {
+        for (const [exchangeRate, index] of itemAndIndex(exchangeRates)) {
-            if (exchangeRates[i].currency === currency) {
+            if (exchangeRate.currency === currency) {
-                exchangeRates.splice(i, 1);
+                exchangeRates.splice(index, 1);
                 changed = true;
                 break;
             }
@@ -262,8 +261,7 @@ export const useExchangeRatesStore = defineStore('exchangeRates', () => {
         const exchangeRates = latestExchangeRates.value.data.exchangeRates;
         const exchangeRateMap: Record<string, LatestExchangeRate> = {};
 
-        for (let i = 0; i < exchangeRates.length; i++) {
+        for (const exchangeRate of exchangeRates) {
-            const exchangeRate = exchangeRates[i];
             exchangeRateMap[exchangeRate.currency] = exchangeRate;
         }
 

src/stores/setting.ts

@@ -1,6 +1,10 @@
 import { ref, computed } from 'vue';
 import { defineStore } from 'pinia';
 
+import {
+    values
+} from '@/core/base.ts';
+
 import {
     type ApplicationSettingValue,
     type ApplicationSettingSubValue,
@@ -39,13 +43,15 @@ export const useSettingsStore = defineStore('settings', () => {
 
     function updateApplicationSettingsValueAndAppSettingsFromCloudSetting(key: string, value: string | number | boolean | Record<string, boolean>): void {
         const keyItems = key.split('.');
+        const keyFirstPart = keyItems[0] as string;
 
         if (keyItems.length === 1) {
-            updateApplicationSettingsValue(keyItems[0], value);
+            updateApplicationSettingsValue(keyFirstPart, value);
-            appSettings.value[keyItems[0]] = value;
+            appSettings.value[keyFirstPart] = value;
         } else if (keyItems.length === 2) {
-            updateApplicationSettingsSubValue(keyItems[0], keyItems[1], value);
+            const subKey = keyItems[1] as string;
-            (appSettings.value[keyItems[0]] as Record<string, ApplicationSettingSubValue>)[keyItems[1]] = value;
+            updateApplicationSettingsSubValue(keyFirstPart, subKey, value);
+            (appSettings.value[keyFirstPart] as Record<string, ApplicationSettingSubValue>)[subKey] = value;
         } else {
             logger.warn(`cannot load application cloud setting "${key}", because it has invalid key format`);
         }
@@ -60,10 +66,12 @@ export const useSettingsStore = defineStore('settings', () => {
         }
 
         const keyItems = key.split('.');
-        let value: ApplicationSettingValue | ApplicationSettingSubValue = appSettings.value[key];
+        let value: ApplicationSettingValue | ApplicationSettingSubValue = appSettings.value[key] as (ApplicationSettingValue | ApplicationSettingSubValue);
 
         if (keyItems.length === 2) {
-            value = (appSettings.value[keyItems[0]] as Record<string, ApplicationSettingSubValue>)[keyItems[1]];
+            const primaryKey = keyItems[0] as string;
+            const subKey = keyItems[1] as string;
+            value = (appSettings.value[primaryKey] as Record<string, ApplicationSettingSubValue>)[subKey] as ApplicationSettingSubValue;
         } else if (keyItems.length > 2) {
             logger.warn(`cannot get application cloud setting "${key}", because it has invalid key format`);
             return null;
@@ -313,8 +321,7 @@ export const useSettingsStore = defineStore('settings', () => {
 
         const settings: ApplicationCloudSetting[] = [];
 
-        for (let i = 0; i < applicationSettingKeys.length; i++) {
+        for (const settingKey of applicationSettingKeys) {
-            const settingKey = applicationSettingKeys[i];
             const cloudSetting = createUserApplicationCloudSetting(settingKey);
 
             if (cloudSetting) {
@@ -333,9 +340,7 @@ export const useSettingsStore = defineStore('settings', () => {
 
         syncedAppSettings.value = arrayItemToObjectField(cloudSettings.map(item => item.settingKey), true);
 
-        for (let i = 0; i < cloudSettings.length; i++) {
+        for (const setting of cloudSettings) {
-            const setting = cloudSettings[i];
-
             if (!setting || !setting.settingKey) {
                 continue;
             }
@@ -371,13 +376,7 @@ export const useSettingsStore = defineStore('settings', () => {
                     let isValid = isObject(map);
 
                     if (isValid) {
-                        for (const key in map) {
+                        for (const value of values(map)) {
-                            if (!Object.prototype.hasOwnProperty.call(map, key)) {
-                                continue;
-                            }
-
-                            const value = map[key];
-
                             if (!isBoolean(value)) {
                                 isValid = false;
                                 break;

src/stores/transaction.ts

@@ -140,11 +140,9 @@ export const useTransactionsStore = defineStore('transactions', () => {
     const allFilterTagIdsCount = computed<number>(() => countSplitItems(transactionsFilter.value.tagIds, ','));
 
     const noTransaction = computed<boolean>(() => {
-        for (let i = 0; i < transactions.value.length; i++) {
+        for (const transactionMonthList of transactions.value) {
-            const transactionMonthList = transactions.value[i];
+            for (const transaction of transactionMonthList.items) {
-
+                if (transaction) {
-            for (let j = 0; j < transactionMonthList.items.length; j++) {
-                if (transactionMonthList.items[j]) {
                     return false;
                 }
             }

src/stores/transactionTag.ts

@@ -1,7 +1,7 @@
 import { ref, computed } from 'vue';
 import { defineStore } from 'pinia';
 
-import type { BeforeResolveFunction } from '@/core/base.ts';
+import { type BeforeResolveFunction, itemAndIndex } from '@/core/base.ts';
 
 import {
     type TransactionTagCreateBatchRequest,
@@ -49,37 +49,37 @@ export const useTransactionTagsStore = defineStore('transactionTags', () => {
         allTransactionTagsMap.value[tag.id] = tag;
     }
 
-    function updateTagInTransactionTagList(tag: TransactionTag): void {
+    function updateTagInTransactionTagList(currentTag: TransactionTag): void {
-        for (let i = 0; i < allTransactionTags.value.length; i++) {
+        for (const [transactionTag, index] of itemAndIndex(allTransactionTags.value)) {
-            if (allTransactionTags.value[i].id === tag.id) {
+            if (transactionTag.id === currentTag.id) {
-                allTransactionTags.value.splice(i, 1, tag);
+                allTransactionTags.value.splice(index, 1, currentTag);
                 break;
             }
         }
 
-        allTransactionTagsMap.value[tag.id] = tag;
+        allTransactionTagsMap.value[currentTag.id] = currentTag;
     }
 
     function updateTagDisplayOrderInTransactionTagList({ from, to }: { from: number, to: number }): void {
-        allTransactionTags.value.splice(to, 0, allTransactionTags.value.splice(from, 1)[0]);
+        allTransactionTags.value.splice(to, 0, allTransactionTags.value.splice(from, 1)[0] as TransactionTag);
     }
 
     function updateTagVisibilityInTransactionTagList({ tag, hidden }: { tag: TransactionTag, hidden: boolean }): void {
         if (allTransactionTagsMap.value[tag.id]) {
-            allTransactionTagsMap.value[tag.id].hidden = hidden;
+            allTransactionTagsMap.value[tag.id]!.hidden = hidden;
         }
     }
 
-    function removeTagFromTransactionTagList(tag: TransactionTag): void {
+    function removeTagFromTransactionTagList(currentTag: TransactionTag): void {
-        for (let i = 0; i < allTransactionTags.value.length; i++) {
+        for (const [transactionTag, index] of itemAndIndex(allTransactionTags.value)) {
-            if (allTransactionTags.value[i].id === tag.id) {
+            if (transactionTag.id === currentTag.id) {
-                allTransactionTags.value.splice(i, 1);
+                allTransactionTags.value.splice(index, 1);
                 break;
             }
         }
 
-        if (allTransactionTagsMap.value[tag.id]) {
+        if (allTransactionTagsMap.value[currentTag.id]) {
-            delete allTransactionTagsMap.value[tag.id];
+            delete allTransactionTagsMap.value[currentTag.id];
         }
     }
 
@@ -223,16 +223,16 @@ export const useTransactionTagsStore = defineStore('transactionTags', () => {
 
     function changeTagDisplayOrder({ tagId, from, to }: { tagId: string, from: number, to: number }): Promise<void> {
         return new Promise((resolve, reject) => {
-            let tag: TransactionTag | null = null;
+            let currentTag: TransactionTag | null = null;
 
-            for (let i = 0; i < allTransactionTags.value.length; i++) {
+            for (const transactionTag of allTransactionTags.value) {
-                if (allTransactionTags.value[i].id === tagId) {
+                if (transactionTag.id === tagId) {
-                    tag = allTransactionTags.value[i];
+                    currentTag = transactionTag;
                     break;
                 }
             }
 
-            if (!tag || !allTransactionTags.value[to]) {
+            if (!currentTag || !allTransactionTags.value[to]) {
                 reject({ message: 'Unable to move tag' });
                 return;
             }
@@ -250,10 +250,10 @@ export const useTransactionTagsStore = defineStore('transactionTags', () => {
     function updateTagDisplayOrders(): Promise<boolean> {
         const newDisplayOrders: TransactionTagNewDisplayOrderRequest[] = [];
 
-        for (let i = 0; i < allTransactionTags.value.length; i++) {
+        for (const [transactionTag, index] of itemAndIndex(allTransactionTags.value)) {
             newDisplayOrders.push({
-                id: allTransactionTags.value[i].id,
+                id: transactionTag.id,
-                displayOrder: i + 1
+                displayOrder: index + 1
             });
         }
 

src/views/base/settings/AccountFilterSettingPageBase.ts

@@ -6,6 +6,7 @@ import { useTransactionsStore } from '@/stores/transaction.ts';
 import { useStatisticsStore } from '@/stores/statistics.ts';
 import { useOverviewStore } from '@/stores/overview.ts';
 
+import { keys, keysIfValueEquals, values } from '@/core/base.ts';
 import type { Account, AccountCategoriesWithVisibleCount } from '@/models/account.ts';
 
 import {
@@ -65,13 +66,7 @@ export function useAccountFilterSettingPageBase(type?: AccountFilterType) {
     function loadFilterAccountIds(): boolean {
         const allAccountIds: Record<string, boolean> = {};
 
-        for (const accountId in accountsStore.allAccountsMap) {
+        for (const account of values(accountsStore.allAccountsMap)) {
-            if (!Object.prototype.hasOwnProperty.call(accountsStore.allAccountsMap, accountId)) {
-                continue;
-            }
-
-            const account = accountsStore.allAccountsMap[accountId];
-
             if (!allowHiddenAccount.value && account.hidden) {
                 continue;
             }
@@ -93,11 +88,7 @@ export function useAccountFilterSettingPageBase(type?: AccountFilterType) {
             filterAccountIds.value = Object.assign(allAccountIds, settingsStore.appSettings.overviewAccountFilterInHomePage);
             return true;
         } else if (type === 'transactionListCurrent') {
-            for (const accountId in transactionsStore.allFilterAccountIds) {
+            for (const accountId of keysIfValueEquals(transactionsStore.allFilterAccountIds, true)) {
-                if (!Object.prototype.hasOwnProperty.call(transactionsStore.allFilterAccountIds, accountId)) {
-                    continue;
-                }
-
                 const account = accountsStore.allAccountsMap[accountId];
 
                 if (account) {
@@ -120,11 +111,7 @@ export function useAccountFilterSettingPageBase(type?: AccountFilterType) {
         let finalAccountIds = '';
         let changed = true;
 
-        for (const accountId in filterAccountIds.value) {
+        for (const accountId of keys(filterAccountIds.value)) {
-            if (!Object.prototype.hasOwnProperty.call(filterAccountIds.value, accountId)) {
-                continue;
-            }
-
             const account = accountsStore.allAccountsMap[accountId];
 
             if (!account) {

src/views/base/settings/AppCloudSyncPageBase.ts

@@ -2,6 +2,7 @@ import { ref, computed } from 'vue';
 
 import { useSettingsStore } from '@/stores/setting.ts';
 
+import { keysIfValueEquals } from '@/core/base.ts';
 import type { ApplicationCloudSetting } from '@/core/setting.ts';
 
 export interface CategorizedApplicationCloudSettingItems {
@@ -101,14 +102,8 @@ export function useAppCloudSyncBase() {
     const isEnableCloudSync = computed<boolean>(() => settingsStore.enableApplicationCloudSync);
 
     const hasEnabledApplicationCloudSettings = computed<boolean>(() => {
-        for (const key in enabledApplicationCloudSettings.value) {
+        for (const _ of keysIfValueEquals(enabledApplicationCloudSettings.value, true)) {
-            if (!Object.prototype.hasOwnProperty.call(enabledApplicationCloudSettings.value, key)) {
+            return true;
-                continue;
-            }
-
-            if (enabledApplicationCloudSettings.value[key]) {
-                return true;
-            }
         }
 
         return false;
@@ -117,22 +112,15 @@ export function useAppCloudSyncBase() {
     const enabledApplicationCloudSettingKeys = computed<string[]>(() => {
         const keys: string[] = [];
 
-        for (const key in enabledApplicationCloudSettings.value) {
+        for (const key of keysIfValueEquals(enabledApplicationCloudSettings.value, true)) {
-            if (!Object.prototype.hasOwnProperty.call(enabledApplicationCloudSettings.value, key)) {
+            keys.push(key);
-                continue;
-            }
-
-            if (enabledApplicationCloudSettings.value[key]) {
-                keys.push(key);
-            }
         }
 
         return keys;
     });
 
     function isAllSettingsSelected(categorizedItems: CategorizedApplicationCloudSettingItems): boolean {
-        for (let i = 0; i < categorizedItems.items.length; i++) {
+        for (const item of categorizedItems.items) {
-            const item = categorizedItems.items[i];
             if (!enabledApplicationCloudSettings.value[item.settingKey]) {
                 return false;
             }
@@ -144,8 +132,7 @@ export function useAppCloudSyncBase() {
     function hasSettingSelectedButNotAllChecked(categorizedItems: CategorizedApplicationCloudSettingItems): boolean {
         let checkedCount = 0;
 
-        for (let i = 0; i < categorizedItems.items.length; i++) {
+        for (const item of categorizedItems.items) {
-            const item = categorizedItems.items[i];
             if (!enabledApplicationCloudSettings.value[item.settingKey]) {
                 checkedCount++;
             }
@@ -155,40 +142,30 @@ export function useAppCloudSyncBase() {
     }
 
     function updateSettingsSelected(categorizedItems: CategorizedApplicationCloudSettingItems, value: boolean): void {
-        for (let i = 0; i < categorizedItems.items.length; i++) {
+        for (const item of categorizedItems.items) {
-            const item = categorizedItems.items[i];
             enabledApplicationCloudSettings.value[item.settingKey] = value;
         }
     }
 
     function selectAllSettings(): void {
-        for (let i = 0; i < ALL_APPLICATION_CLOUD_SETTINGS.length; i++) {
+        for (const categorizedItems of ALL_APPLICATION_CLOUD_SETTINGS) {
-            const categorizedItems = ALL_APPLICATION_CLOUD_SETTINGS[i];
+            for (const item of categorizedItems.items) {
-
-            for (let j = 0; j < categorizedItems.items.length; j++) {
-                const item = categorizedItems.items[j];
                 enabledApplicationCloudSettings.value[item.settingKey] = true;
             }
         }
     }
 
     function selectNoneSettings(): void {
-        for (let i = 0; i < ALL_APPLICATION_CLOUD_SETTINGS.length; i++) {
+        for (const categorizedItems of ALL_APPLICATION_CLOUD_SETTINGS) {
-            const categorizedItems = ALL_APPLICATION_CLOUD_SETTINGS[i];
+            for (const item of categorizedItems.items) {
-
-            for (let j = 0; j < categorizedItems.items.length; j++) {
-                const item = categorizedItems.items[j];
                 enabledApplicationCloudSettings.value[item.settingKey] = false;
             }
         }
     }
 
     function selectInvertSettings(): void {
-        for (let i = 0; i < ALL_APPLICATION_CLOUD_SETTINGS.length; i++) {
+        for (const categorizedItems of ALL_APPLICATION_CLOUD_SETTINGS) {
-            const categorizedItems = ALL_APPLICATION_CLOUD_SETTINGS[i];
+            for (const item of categorizedItems.items) {
-
-            for (let j = 0; j < categorizedItems.items.length; j++) {
-                const item = categorizedItems.items[j];
                 enabledApplicationCloudSettings.value[item.settingKey] = !enabledApplicationCloudSettings.value[item.settingKey];
             }
         }

src/views/base/settings/AppSettingsPageBase.ts

@@ -9,7 +9,7 @@ import { useTransactionCategoriesStore } from '@/stores/transactionCategory.ts';
 import { useOverviewStore } from '@/stores/overview.ts';
 import { useStatisticsStore } from '@/stores/statistics.ts';
 
-import type { NameValue, TypeAndDisplayName } from '@/core/base.ts';
+import { type NameValue, type TypeAndDisplayName, keysIfValueEquals, values } from '@/core/base.ts';
 import type { LocalizedTimezoneInfo } from '@/core/timezone.ts';
 import { CategoryType } from '@/core/category.ts';
 import type { Account } from '@/models/account.ts';
@@ -145,12 +145,8 @@ export function useAppSettingPageBase() {
 
         let hasExcludeAccount = false;
 
-        for (const accountId in excludeAccountIds) {
+        for (const accountId of keysIfValueEquals(excludeAccountIds, true)) {
-            if (!Object.prototype.hasOwnProperty.call(excludeAccountIds, accountId)) {
+            if (accountsStore.allAccountsMap[accountId]) {
-                continue;
-            }
-
-            if (excludeAccountIds[accountId] && accountsStore.allAccountsMap[accountId]) {
                 hasExcludeAccount = true;
                 break;
             }
@@ -162,9 +158,7 @@ export function useAppSettingPageBase() {
 
         let allAccountExcluded = true;
 
-        for (let i = 0; i < allAccounts.length; i++) {
+        for (const account of allAccounts) {
-            const account = allAccounts[i];
-
             if (!excludeAccountIds[account.id]) {
                 allAccountExcluded = false;
                 break;
@@ -185,12 +179,8 @@ export function useAppSettingPageBase() {
 
         let hasExcludeTransactionCategory = false;
 
-        for (const transactionCategoryId in excludeTransactionCategoryIds) {
+        for (const transactionCategoryId of keysIfValueEquals(excludeTransactionCategoryIds, true)) {
-            if (!Object.prototype.hasOwnProperty.call(excludeTransactionCategoryIds, transactionCategoryId)) {
+            if (transactionCategoriesStore.allTransactionCategoriesMap[transactionCategoryId]) {
-                continue;
-            }
-
-            if (excludeTransactionCategoryIds[transactionCategoryId] && transactionCategoriesStore.allTransactionCategoriesMap[transactionCategoryId]) {
                 hasExcludeTransactionCategory = true;
                 break;
             }
@@ -202,13 +192,7 @@ export function useAppSettingPageBase() {
 
         let allTransactionCategoryExcluded = true;
 
-        for (const transactionCategoryId in transactionCategoriesStore.allTransactionCategoriesMap) {
+        for (const transactionCategory of values(transactionCategoriesStore.allTransactionCategoriesMap)) {
-            if (!Object.prototype.hasOwnProperty.call(transactionCategoriesStore.allTransactionCategoriesMap, transactionCategoryId)) {
-                continue;
-            }
-
-            const transactionCategory = transactionCategoriesStore.allTransactionCategoriesMap[transactionCategoryId];
-
             if (transactionCategory.type !== CategoryType.Income && transactionCategory.type !== CategoryType.Expense) {
                 continue;
             }

src/views/base/settings/TransactionTagFilterSettingPageBase.ts

@@ -6,7 +6,7 @@ import { useTransactionTagsStore } from '@/stores/transactionTag.ts';
 import { useTransactionsStore } from '@/stores/transaction.ts';
 import { useStatisticsStore } from '@/stores/statistics.ts';
 
-import type { TypeAndDisplayName } from '@/core/base.ts';
+import { type TypeAndDisplayName, keys, keysIfValueEquals, values } from '@/core/base.ts';
 import { TransactionTagFilterType } from '@/core/transaction.ts';
 import type { TransactionTag } from '@/models/transaction_tag.ts';
 
@@ -44,20 +44,14 @@ export function useTransactionTagFilterSettingPageBase(type?: string) {
     function loadFilterTagIds(): boolean {
         const allTransactionTagIds: Record<string, boolean> = {};
 
-        for (const transactionTagId in transactionTagsStore.allTransactionTagsMap) {
+        for (const transactionTag of values(transactionTagsStore.allTransactionTagsMap)) {
-            if (!Object.prototype.hasOwnProperty.call(transactionTagsStore.allTransactionTagsMap, transactionTagId)) {
-                continue;
-            }
-
-            const transactionTag = transactionTagsStore.allTransactionTagsMap[transactionTagId];
             allTransactionTagIds[transactionTag.id] = true;
         }
 
         if (type === 'statisticsCurrent') {
             const transactionTagIds = statisticsStore.transactionStatisticsFilter.tagIds ? statisticsStore.transactionStatisticsFilter.tagIds.split(',') : [];
 
-            for (let i = 0; i < transactionTagIds.length; i++) {
+            for (const transactionTagId of transactionTagIds) {
-                const transactionTagId = transactionTagIds[i];
                 const transactionTag = transactionTagsStore.allTransactionTagsMap[transactionTagId];
 
                 if (transactionTag) {
@@ -68,11 +62,7 @@ export function useTransactionTagFilterSettingPageBase(type?: string) {
             tagFilterType.value = statisticsStore.transactionStatisticsFilter.tagFilterType;
             return true;
         } else if (type === 'transactionListCurrent') {
-            for (const transactionTagId in transactionsStore.allFilterTagIds) {
+            for (const transactionTagId of keysIfValueEquals(transactionsStore.allFilterTagIds, true)) {
-                if (!Object.prototype.hasOwnProperty.call(transactionsStore.allFilterTagIds, transactionTagId)) {
-                    continue;
-                }
-
                 const transactionTag = transactionTagsStore.allTransactionTagsMap[transactionTagId];
 
                 if (transactionTag) {
@@ -91,11 +81,7 @@ export function useTransactionTagFilterSettingPageBase(type?: string) {
         let finalTagIds = '';
         let changed = true;
 
-        for (const transactionTagId in filterTagIds.value) {
+        for (const transactionTagId of keys(filterTagIds.value)) {
-            if (!Object.prototype.hasOwnProperty.call(filterTagIds.value, transactionTagId)) {
-                continue;
-            }
-
             const transactionTag = transactionTagsStore.allTransactionTagsMap[transactionTagId];
 
             if (!transactionTag) {

src/views/base/transactions/TransactionListPageBase.ts

@@ -9,7 +9,7 @@ import { useTransactionCategoriesStore } from '@/stores/transactionCategory.ts';
 import { useTransactionTagsStore } from '@/stores/transactionTag.ts';
 import { type TransactionListFilter, type TransactionMonthList, useTransactionsStore } from '@/stores/transaction.ts';
 
-import type { TypeAndName } from '@/core/base.ts';
+import { type TypeAndName, entries } from '@/core/base.ts';
 import type { NumeralSystem } from '@/core/numeral.ts';
 import { type TextualYearMonthDay, type Year0BasedMonth, type LocalizedDateRange, type WeekDayValue, DateRange, DateRangeScene } from '@/core/datetime.ts';
 import { AccountType } from '@/core/account.ts';
@@ -113,16 +113,12 @@ export function useTransactionListPageBase() {
     const allPrimaryCategories = computed<Record<string, TransactionCategory[]>>(() => {
         const primaryCategories: Record<string, TransactionCategory[]> = {};
 
-        for (const categoryType in transactionCategoriesStore.allTransactionCategories) {
+        for (const [categoryType, categories] of entries(transactionCategoriesStore.allTransactionCategories)) {
-            if (!Object.prototype.hasOwnProperty.call(transactionCategoriesStore.allTransactionCategories, categoryType)) {
-                continue;
-            }
-
             if (query.value.type && categoryTypeToTransactionType(parseInt(categoryType)) !== query.value.type) {
                 continue;
             }
 
-            primaryCategories[categoryType] = transactionCategoriesStore.allTransactionCategories[categoryType];
+            primaryCategories[categoryType] = categories;
         }
 
         return primaryCategories;
@@ -131,17 +127,13 @@ export function useTransactionListPageBase() {
     const allAvailableCategoriesCount = computed<number>(() => {
         let totalCount = 0;
 
-        for (const categoryType in transactionCategoriesStore.allTransactionCategories) {
+        for (const [categoryType, categories] of entries(transactionCategoriesStore.allTransactionCategories)) {
-            if (!Object.prototype.hasOwnProperty.call(transactionCategoriesStore.allTransactionCategories, categoryType)) {
-                continue;
-            }
-
             if (query.value.type && categoryTypeToTransactionType(parseInt(categoryType)) !== query.value.type) {
                 continue;
             }
 
-            if (transactionCategoriesStore.allTransactionCategories[categoryType]) {
+            if (categories) {
-                totalCount += transactionCategoriesStore.allTransactionCategories[categoryType].length;
+                totalCount += categories.length;
             }
         }
 
@@ -229,7 +221,7 @@ export function useTransactionListPageBase() {
         const displayAmount: string[] = [];
 
         for (let i = 1; i < amountFilterItems.length; i++) {
-            displayAmount.push(formatAmountToLocalizedNumeralsWithCurrency(parseInt(amountFilterItems[i]), false));
+            displayAmount.push(formatAmountToLocalizedNumeralsWithCurrency(parseInt(amountFilterItems[i] as string), false));
         }
 
         return displayAmount.join(' ~ ');
@@ -249,9 +241,9 @@ export function useTransactionListPageBase() {
         const currentYear = currentMonthMinDate.getGregorianCalendarYear();
         const currentMonth = currentMonthMinDate.getGregorianCalendarMonth();
 
-        for (let i = 0; i < allTransactions.length; i++) {
+        for (const transactionMonth of allTransactions) {
-            if (allTransactions[i].year === currentYear && allTransactions[i].month === currentMonth) {
+            if (transactionMonth.year === currentYear && transactionMonth.month === currentMonth) {
-                return allTransactions[i];
+                return transactionMonth;
             }
         }
 

src/views/desktop/common/cards/AccountFilterSettingsCard.vue

@@ -111,7 +111,7 @@
                                         v-if="(showHidden || !account.hidden) && account.type === AccountType.MultiSubAccounts.type && ((showHidden && accountCategory.allSubAccounts[account.id]) || accountCategory.allVisibleSubAccountCounts[account.id])">
                                     <template :key="subAccount.id"
                                               v-for="(subAccount, subIdx) in accountCategory.allSubAccounts[account.id]">
-                                        <v-divider v-if="showHidden ? subIdx > 0 : (!subAccount.hidden ? subIdx > accountCategory.allFirstVisibleSubAccountIndexes[account.id] : false)"/>
+                                        <v-divider v-if="showHidden ? subIdx > 0 : (!subAccount.hidden ? subIdx > (accountCategory.allFirstVisibleSubAccountIndexes[account.id] as number) : false)"/>
 
                                         <v-list-item v-if="showHidden || !subAccount.hidden">
                                             <template #prepend>

src/views/desktop/common/cards/CategoryFilterSettingsCard.vue

@@ -108,7 +108,7 @@
                                         v-if="(showHidden || !category.hidden) && ((showHidden && transactionType.allSubCategories[category.id]) || transactionType.allVisibleSubCategoryCounts[category.id])">
                                     <template :key="subCategory.id"
                                               v-for="(subCategory, subIdx) in transactionType.allSubCategories[category.id]">
-                                        <v-divider v-if="showHidden ? subIdx > 0 : (!subCategory.hidden ? subIdx > transactionType.allFirstVisibleSubCategoryIndexes[category.id] : false)"/>
+                                        <v-divider v-if="showHidden ? subIdx > 0 : (!subCategory.hidden ? subIdx > (transactionType.allFirstVisibleSubCategoryIndexes[category.id] as number) : false)"/>
 
                                         <v-list-item v-if="showHidden || !subCategory.hidden">
                                             <template #prepend>

src/views/desktop/exchangerates/ListPage.vue

@@ -227,8 +227,7 @@ function reload(force: boolean): void {
             const exchangeRates = exchangeRatesData.value.exchangeRates;
             let foundDefaultCurrency = false;
 
-            for (let i = 0; i < exchangeRates.length; i++) {
+            for (const exchangeRate of exchangeRates) {
-                const exchangeRate = exchangeRates[i];
                 if (exchangeRate.currency === baseCurrency.value) {
                     foundDefaultCurrency = true;
                     break;

src/views/desktop/transactions/import/ImportDialog.vue

@@ -696,7 +696,7 @@ function close(completed: boolean): void {
 
 watch(fileType, () => {
     if (allFileSubTypes.value && allFileSubTypes.value.length) {
-        fileSubType.value = allFileSubTypes.value[0].type;
+        fileSubType.value = allFileSubTypes.value[0]!.type;
     }
 
     importFile.value = null;

src/views/desktop/user/settings/tabs/UserSecuritySettingTab.vue

@@ -145,6 +145,7 @@ import { useRootStore } from '@/stores/index.ts';
 import { useSettingsStore } from '@/stores/setting.ts';
 import { useTokensStore } from '@/stores/token.ts';
 
+import { itemAndIndex, reversedItemAndIndex } from '@/core/base.ts';
 import { type TokenInfoResponse, SessionInfo } from '@/models/token.ts';
 
 import { isEquals } from '@/lib/common.ts';
@@ -203,8 +204,7 @@ const sessions = computed<DesktopPageSessionInfo[]>(() => {
         return sessions;
     }
 
-    for (let i = 0; i < tokens.value.length; i++) {
+    for (const token of tokens.value) {
-        const token = tokens.value[i];
         const sessionInfo = parseSessionInfo(token);
         sessions.push(new DesktopPageSessionInfo(sessionInfo));
     }
@@ -336,9 +336,9 @@ function revokeSession(session: SessionInfo): void {
         }).then(() => {
             loadingSession.value = false;
 
-            for (let i = 0; i < tokens.value.length; i++) {
+            for (const [token, index] of itemAndIndex(tokens.value)) {
-                if (tokens.value[i].tokenId === session.tokenId) {
+                if (token.tokenId === session.tokenId) {
-                    tokens.value.splice(i, 1);
+                    tokens.value.splice(index, 1);
                 }
             }
         }).catch(error => {
@@ -362,9 +362,9 @@ function revokeAllSessions(): void {
         tokensStore.revokeAllTokens().then(() => {
             loadingSession.value = false;
 
-            for (let i = tokens.value.length - 1; i >= 0; i--) {
+            for (const [token, index] of reversedItemAndIndex(tokens.value)) {
-                if (!tokens.value[i].isCurrent) {
+                if (!token.isCurrent) {
-                    tokens.value.splice(i, 1);
+                    tokens.value.splice(index, 1);
                 }
             }
 

src/views/mobile/exchangerates/ListPage.vue

@@ -309,8 +309,7 @@ exchangeRatesStore.getLatestExchangeRates({
         const exchangeRates = exchangeRatesData.value.exchangeRates;
         let hasBaseCurrency = false;
 
-        for (let i = 0; i < exchangeRates.length; i++) {
+        for (const exchangeRate of exchangeRates) {
-            const exchangeRate = exchangeRates[i];
             if (exchangeRate.currency === baseCurrency.value) {
                 hasBaseCurrency = true;
                 break;