golang中的slice翻转存在以及map中的key判断

//slice翻转
func stringReverse(src []string){
    if src == nil {
        panic(fmt.Errorf("the src can‘t be empty!"))
    }
    count := len(src)
    mid := count/2
    for i := 0;i < mid; i++{
        tmp := src[i]
        src[i] = src[count-1]
        src[count-1] = tmp
        count--
    }
}

//判断是否包含
func sliceContains(src []string,value string)bool{
    isContain := false
    for _,srcValue := range src  {
        if(srcValue == value){
            isContain = true
            break
        }
    }
    return isContain
}

//判断key是否存在
func mapContains(src map[string]int ,key string) bool{
    if _, ok := src[key]; ok {
        return true
    }
    return false
}