其他工具

目录

• in
• 字符串反转
• 随机数

in

func elementIsInSlice(element int, elements []int) (isIn bool) {
	for _, item := range elements {
		if element == item {
			isIn = true
			return
		}
	}
	return
}

func elementIsInSlice2(element string, elements []string) (isIn bool) {
	for _, item := range elements {
		if element == item {
			isIn = true
			return
		}
	}
	return
}

func main() {
	li:=[]string{"a","b","c"}
	if elementIsInSlice2("a",li){
		fmt.Println("在里面")
	}

}

字符串反转

func main() {
	fmt.Println(reverseString("abc"))
}

//字符串反转
func reverseString(str string) string {
	strRune := []rune(str)
	l := len(strRune)
	for i := 0; i < l/2; i++ {
		strRune[i], strRune[l-i-1] = strRune[l-i-1], strRune[i]
	}
	return string(strRune)
}

随机数

func RandomInt(length int) (str string) {

	var arr []byte = []byte{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'}

	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	size := len(arr)
	for i := 0; i < length; i++ {
		str += string(arr[r.Intn(size)])
	}
	return
}