常用函数

// map|slice|array 中是否包含某个值
func Contains(array interface{}, val interface{}) (index int) {
   index = -1
   switch reflect.TypeOf(array).Kind() {
   case reflect.Slice: {
      s := reflect.ValueOf(array)
      for i := 0; i < s.Len(); i++ {
         if reflect.DeepEqual(val, s.Index(i).Interface()) {
            index = i
            return
         }
      }
   }
   }
   return
}

// 打乱map顺序
func Shuffle(slice []map[string]string) {
   r := rand.New(rand.NewSource(time.Now().Unix()))
   for len(slice) > 0 {
      n := len(slice)
      randIndex := r.Intn(n)
      slice[n-1], slice[randIndex] = slice[randIndex], slice[n-1]
      slice = slice[:n-1]
   }
}

//判断是不是一个数字
func IsNumber(v interface{}) bool{
   result,_ := regexp.MatchString( "\\d+" ,fmt.Sprint(v))
   return result
}

//md5加密
func GetMd5String(s string) string {
   h := md5.New()
   h.Write([]byte(s))
   return hex.EncodeToString(h.Sum(nil))
}

//进行zlib压缩
func DoZlibCompress(src []byte) []byte {
   var in bytes.Buffer
   w := zlib.NewWriter(&in)
   w.Write(src)
   w.Close()
   return in.Bytes()
}

//进行zlib解压缩
func DoZlibUnCompress(compressSrc []byte) []byte {
   b := bytes.NewReader(compressSrc)
   var out bytes.Buffer
   r, _ := zlib.NewReader(b)
   io.Copy(&out, r)
   return out.Bytes()
}

//gzip 压缩
func GzipEncode(in []byte) ([]byte, error) {
   var (
      buffer bytes.Buffer
      out    []byte
      err    error
   )
   writer := gzip.NewWriter(&buffer)
   _, err = writer.Write(in)
   if err != nil {
      writer.Close()
      return out, err
   }
   err = writer.Close()
   if err != nil {
      return out, err
   }

   return buffer.Bytes(), nil
}

// gzip 解压
func GzipDecode(in []byte) ([]byte, error) {
   reader, err := gzip.NewReader(bytes.NewReader(in))
   if err != nil {
      var out []byte
      return out, err
   }
   defer reader.Close()

   return ioutil.ReadAll(reader)
}

// base64 encode
base64.StdEncoding.EncodeToString([]byte(txt))

// base64 decode
base64.RawURLEncoding.DecodeString(decodeStr)