doc: update format

datetime/datetime.go

@@ -3,7 +3,7 @@
 
 // Package datetime implements some functions to format date and time.
 // Note:
-// 1. `format` param in FormatTimeToStr function should be as flow:
+// 1. `format` param in FormatTimeToStr function should be as flow (case no sensitive):
 // "yyyy-mm-dd hh:mm:ss"
 // "yyyy-mm-dd hh:mm"
 // "yyyy-mm-dd hh"
@@ -18,14 +18,19 @@
 // "yyyy/mm"
 // "mm/dd"
 // "dd/mm/yy hh:mm:ss"
+// "yyyymmdd"
+// "mmddyy"
 // "yyyy"
+// "yy"
 // "mm"
 // "hh:mm:ss"
+// "hh:mm"
 // "mm:ss"
 package datetime
 
 import (
 	"fmt"
+	"strings"
 	"time"
 )
 
@@ -47,7 +52,10 @@ func init() {
 		"yyyy/mm":             "2006/01",
 		"mm/dd":               "01/02",
 		"dd/mm/yy hh:mm:ss":   "02/01/06 15:04:05",
+		"yyyymmdd":            "20060102",
+		"mmddyy":              "010206",
 		"yyyy":                "2006",
+		"yy":                  "06",
 		"mm":                  "01",
 		"hh:mm:ss":            "15:04:05",
 		"hh:mm":               "15:04",
@@ -126,22 +134,27 @@ func GetNightTimestamp() int64 {
 // FormatTimeToStr convert time to string.
 // Play: https://go.dev/play/p/_Ia7M8H_OvE
 func FormatTimeToStr(t time.Time, format string, timezone ...string) string {
+	tf, ok := timeFormat[strings.ToLower(format)]
+	if !ok {
+		return ""
+	}
+
 	if timezone != nil && timezone[0] != "" {
 		loc, err := time.LoadLocation(timezone[0])
 		if err != nil {
 			return ""
 		}
-		return t.In(loc).Format(timeFormat[format])
+		return t.In(loc).Format(tf)
 	}
-	return t.Format(timeFormat[format])
+	return t.Format(tf)
 }
 
 // FormatStrToTime convert string to time.
 // Play: https://go.dev/play/p/1h9FwdU8ql4
 func FormatStrToTime(str, format string, timezone ...string) (time.Time, error) {
-	tf, ok := timeFormat[format]
+	tf, ok := timeFormat[strings.ToLower(format)]
 	if !ok {
-		return time.Time{}, fmt.Errorf("format %s not found", format)
+		return time.Time{}, fmt.Errorf("format %s not support", format)
 	}
 
 	if timezone != nil && timezone[0] != "" {
@@ -286,8 +299,8 @@ func IsWeekend(t time.Time) bool {
 // NowDateOrTime return current datetime with specific format and timezone.
 // Play: todo
 func NowDateOrTime(format string, timezone ...string) string {
-	tf := timeFormat[format]
-	if tf == "" {
+	tf, ok := timeFormat[strings.ToLower(format)]
+	if !ok {
 		return ""
 	}
 

docs/datetime.md

@@ -68,7 +68,7 @@ import (
 
 ## Note:
 
-1. 'format' string param in func FormatTimeToStr and FormatStrToTime function should be one of flows:
+1. In below functions, the `format` string param should be one of flows value (case no sensitive):
 
 -   yyyy-mm-dd hh:mm:ss
 -   yyyy-mm-dd hh:mm
@@ -79,14 +79,18 @@ import (
 -   dd-mm-yy hh:mm:ss
 -   yyyy/mm/dd hh:mm:ss
 -   yyyy/mm/dd hh:mm
--   yyyy-mm-dd hh
+-   yyyy/mm/dd hh
 -   yyyy/mm/dd
 -   yyyy/mm
 -   mm/dd
 -   dd/mm/yy hh:mm:ss
+-   yyyymmdd
+-   mmddyy
 -   yyyy
+-   yy
 -   mm
 -   hh:mm:ss
+-   hh:mm
 -   mm:ss
 
 ### <span id="AddDay">AddDay</span>
@@ -1186,7 +1190,6 @@ func main() {
 }
 ```
 
-
 ### <span id="BetweenSeconds">BetweenSeconds</span>
 
 <p>Return the number of seconds between two times.</p>
@@ -1224,7 +1227,6 @@ func main() {
 }
 ```
 
-
 ### <span id="DayOfYear">DayOfYear</span>
 
 <p>Returns which day of the year the parameter date `t` is.</p>
@@ -1266,7 +1268,6 @@ func main() {
 }
 ```
 
-
 ### <span id="IsWeekend">IsWeekend</span>
 
 <p>Checks if passed time is weekend or not.</p>

docs/datetime_zh-CN.md

@@ -61,14 +61,13 @@ import (
 -   [IsWeekend](#IsWeekend)
 -   [NowDateOrTime](#NowDateOrTime)
 
-
 <div STYLE="page-break-after: always;"></div>
 
 ## 文档
 
 ## 注:
 
-1. 方法 FormatTimeToStr 和 FormatStrToTime 中的 format 参数值需要传以下类型之一：
+1. 函数中`format`参数值需要传以下值之一 (忽略大小写):
 
 -   yyyy-mm-dd hh:mm:ss
 -   yyyy-mm-dd hh:mm
@@ -79,14 +78,18 @@ import (
 -   dd-mm-yy hh:mm:ss
 -   yyyy/mm/dd hh:mm:ss
 -   yyyy/mm/dd hh:mm
--   yyyy-mm-dd hh
+-   yyyy/mm/dd hh
 -   yyyy/mm/dd
 -   yyyy/mm
 -   mm/dd
 -   dd/mm/yy hh:mm:ss
+-   yyyymmdd
+-   mmddyy
 -   yyyy
+-   yy
 -   mm
 -   hh:mm:ss
+-   hh:mm
 -   mm:ss
 
 ### <span id="AddDay">AddDay</span>