add comments, code refactor, fix typo

pkg/utils/converter.go

@@ -2,14 +2,18 @@ package utils
 
 import "strconv"
 
+// Int32ToString returns the textual representation of this number
 func Int32ToString(num int) string {
 	return strconv.Itoa(num)
 }
 
+// StringToInt32 parses a textual representation of the number to int32
 func StringToInt32(str string) (int, error) {
 	return strconv.Atoi(str)
 }
 
+// StringTryToInt32 parses a textual representation of the number to int32 if str is valid,
+// or returns the default value
 func StringTryToInt32(str string, defaultValue int) int {
 	num, err := StringToInt32(str)
 
@@ -20,14 +24,18 @@ func StringTryToInt32(str string, defaultValue int) int {
 	return num
 }
 
+// Int64ToString returns the textual representation of this number
 func Int64ToString(num int64) string {
 	return strconv.FormatInt(num, 10)
 }
 
+// StringToInt64 parses a textual representation of the number to int64
 func StringToInt64(str string) (int64, error) {
 	return strconv.ParseInt(str, 10, 64)
 }
 
+// StringTryToInt64 parses a textual representation of the number to int64 if str is valid,
+// or returns the default value
 func StringTryToInt64(str string, defaultValue int64) int64 {
 	num, err := StringToInt64(str)