一些看似奇怪的代码
1. [github.com/jumpjumpbean/go-activiti-rest](https://github.com/jumpjumpbean/go-activiti-rest/blob/master/client.go#L101)
```go
// NewRequest constructs a request
// Convert payload to a JSON
func (c *ActClient) NewRequest(method, url string, payload interface{}) (*http.Request, error) {
var buf io.Reader
if payload != nil {
var b []byte
b, err := json.Marshal(&payload)
if err != nil {
return nil, err
}
buf = bytes.NewBuffer(b)
}
return http.NewRequest(method, url, buf)
}
```
> 此处`json.Marshal(&payload)`个人认为不需要&取地址符号
经过查阅资料得到一个说法，`只不过指针更快，且能节省内存空间`
2. [github.com/Leizhenpeng/feishu-chatGpt](https://github.com/Leizhenpeng/feishu-chatGpt/blob/master/code/services/gpt3.go#L79)
```go
if response.StatusCode/2 != 100 {
return "", fmt.Errorf("gtp api %s", response.Status)
}
```
> 除2xx外均认为是失败，巧妙使用int除法特性找齐2xx状态码