golang 删除切片的某个元素以及剔除切片内的零值

func remove(slice []interface{}, elem interface{}) []interface{}{
    if len(slice) == 0 {
        return slice
    }
    for i, v := range slice {
        if v == elem {
            slice = append(slice[:i], slice[i+1:]...)
            return remove(slice,elem)
            break
        }
    }
    return slice
}

func removeZero(slice []interface{}) []interface{}{
    if len(slice) == 0 {
        return slice
    }
    for i, v := range slice {
        if ifZero(v) {
            slice = append(slice[:i], slice[i+1:]...)
            return removeZero(slice)
            break
        }
    }
    return slice
}

//判断一个值是否为零值，只支持string,float,int,time 以及其各自的指针，"%"和"%%"也属于零值范畴，场景是like语句
func IfZero(arg interface{}) bool {
    if arg == nil {
        return true
    }
    switch v := arg.(type) {
    case int, int32, int16, int64:
        if v == 0 {
            return true
        }
    case float32:
        r:=float64(v)
        return math.Abs(r-0)<0.0000001
    case float64:
        return math.Abs(v-0)<0.0000001
    case string:
        if v == "" || v == "%%" || v == "%" {
            return true
        }
    case *string, *int, *int64, *int32, *int16, *int8, *float32, *float64, *time.Time:
        if v == nil {
            return true
        }
    case time.Time:
        return v.IsZero()
    default:
        return false
    }
    return false
}