> ## Documentation Index
> Fetch the complete documentation index at: https://docs.xray.cool/llms.txt
> Use this file to discover all available pages before exploring further.
# versionLess
> `versionLess`函数主要是用来比较一个**版本字符串**是否小于所给出的**版本字符串**
## 函数原型
`func (s1 string) versionLess(s2 string) bool`
### 参数介绍
| 参数名称 | 参数介绍 |
| ---- | ------------ |
| s1 | 需要进行比较的版本字符串 |
| s2 | 需要进行判断的版本字符串 |
## 举例
| 待转换数据 | 转换语句 | 输出结果 |
| --------------- | -------------------------------------------- | ------- |
| `1.8.1` | `"1.8.1".versionLess("1.8.2")` | `true` |
| `1.8.1.1-alpha` | `"1.8.1.1-alpha".versionLess("1.8.1-alpha")` | `false` |
* **Response**
```HTTP theme={null}
HTTP/1.1 200 OK
Server: nginx
Date: Sat, 07 Jan 2023 10:41:06 GMT
Content-Type: text/html; charset=utf-8
Connection: close
Vary: Accept-Encoding
Cache-Control: no-cache
Content-Length: 85
123
1.8.1
```
* 匹配语句：`"(?P\\d\\.\\d\\.\\d\\.)".submatch(response.body_string)["version"].versionLess("1.8.2")`
* 输出结果：`true`