feat: add jq.md (#27)
This commit is contained in:
jaywcjlove
13
README.md
13
README.md
@@ -42,7 +42,7 @@ Quick Reference
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[MySQL](./docs/mysql.md)<!--rehype:style=background: rgb(103 61 156/var(\-\-bg\-opacity));&class=tag&data-lang=SQL-->
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[MATLAB](./docs/matlab.md)<!--rehype:style=background: rgb(0 118 168/var(\-\-bg\-opacity));&class=contributing-->
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[Python](./docs/python.md)<!--rehype:style=background: rgb(240 81 57/var(\-\-bg\-opacity));-->
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[PostgreSQL](./docs/postgres.md)<!--rehype:style=background: rgb(43 109 163/var(\-\-bg\-opacity));-->
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[PostgreSQL](./docs/postgres.md)<!--rehype:style=background: rgb(43 109 163/var(\-\-bg\-opacity));&class=tag&data-lang=SQL-->
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[Rust](./docs/rust.md)<!--rehype:style=background: rgb(71 71 71/var(\-\-bg\-opacity));-->
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[Swift](./docs/swift.md)<!--rehype:style=background: rgb(240 81 57/var(\-\-bg\-opacity));-->
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[SwiftUI](./docs/swiftui.md)<!--rehype:style=background: rgb(10 127 247/var(\-\-bg\-opacity));&class=tag&data-lang=swift-->
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@@ -86,16 +86,16 @@ Quick Reference
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[Gmail](./docs/gmail.md)<!--rehype:style=background: rgb(234 67 54/var(\-\-bg\-opacity));-->
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[nginx](./docs/nginx.md)<!--rehype:style=background: rgb(0 153 0/var(\-\-bg\-opacity));-->
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[Semver](./docs/semver.md)<!--rehype:style=background: rgb(106 111 141/var(\-\-bg\-opacity));-->
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[Sketch](./docs/sketch.md)<!--rehype:style=background: rgb(223 148 0/var(\-\-bg\-opacity));-->
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[Sketch](./docs/sketch.md)<!--rehype:style=background: rgb(223 148 0/var(\-\-bg\-opacity));&class=tag&data-lang=macOS-->
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[Sublime Text](./docs/sublime-text.md)<!--rehype:style=background: rgb(223 148 0/var(\-\-bg\-opacity));-->
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[VSCode](./docs/vscode.md)<!--rehype:style=background: rgb(91 163 230/var(\-\-bg\-opacity));-->
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[Vim](./docs/vim.md)<!--rehype:style=background: rgb(9 150 8/var(\-\-bg\-opacity));-->
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[WebStorm](./docs/webstorm.md)<!--rehype:style=background: rgb(32 148 220/var(\-\-bg\-opacity));-->
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[XPath](./docs/xpath.md)<!--rehype:style=background: rgb(91 163 230/var(\-\-bg\-opacity));-->
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[Xcode](./docs/xcode.md)<!--rehype:style=background: rgb(24 151 233/var(\-\-bg\-opacity));-->
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[Xcode](./docs/xcode.md)<!--rehype:style=background: rgb(24 151 233/var(\-\-bg\-opacity));&class=tag&data-lang=macOS-->
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<!--rehype:class=home-card-->
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## Linux 命令
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## 命令
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[Ansible](./docs/ansible.md)<!--rehype:style=background: rgb(238 0 0/var(\-\-bg\-opacity));&class=contributing tag&data-lang=RedHad&data-info=👆看看还缺点儿什么？-->
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[Awk](./docs/awk.md)<!--rehype:style=background: rgb(16 185 129/var(\-\-bg\-opacity));-->
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@@ -110,8 +110,9 @@ Quick Reference
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[Find](./docs/find.md)<!--rehype:style=background: rgb(16 185 129/var(\-\-bg\-opacity));-->
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[FFmpeg](./docs/ffmpeg.md)<!--rehype:style=background: rgb(0 193 9/var(\-\-bg\-opacity));&class=contributing-->
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[Htop](./docs/htop.md)<!--rehype:style=background: rgb(16 185 129/var(\-\-bg\-opacity));-->
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[Home Brew](./docs/homebrew.md)<!--rehype:style=background: rgb(252 185 87/var(\-\-bg\-opacity));-->
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[Home Brew](./docs/homebrew.md)<!--rehype:style=background: rgb(252 185 87/var(\-\-bg\-opacity));&class=tag&data-lang=macOS-->
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[Netstat](./docs/netstat.md)<!--rehype:style=background: rgb(16 185 129/var(\-\-bg\-opacity));-->
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[jq](./docs/jq.md)<!--rehype:style=background: rgb(16 185 129/var(\-\-bg\-opacity));&class=tag&data-lang=JSON-->
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[Lsof](./docs/lsof.md)<!--rehype:style=background: rgb(16 185 129/var(\-\-bg\-opacity));-->
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[Netcat](./docs/netcat.md)<!--rehype:style=background: rgb(4 92 135/var(\-\-bg\-opacity));-->
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[Sed](./docs/sed.md)<!--rehype:style=background: rgb(16 185 129/var(\-\-bg\-opacity));-->
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@@ -122,7 +123,7 @@ Quick Reference
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## 其它
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[Quick Reference](./docs/quickreference.md)<!--rehype:style=background: rgb(16 185 129/var(\-\-bg\-opacity));-->
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[Quick Reference](./docs/quickreference.md)<!--rehype:style=background: rgb(16 185 129/var(\-\-bg\-opacity));&class=tag&data-lang=排版说明-->
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[Github Actions](./docs/github-actions.md)<!--rehype:style=background: rgb(121 184 255/var(\-\-bg\-opacity));-->
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[Colors Named](./docs/colors-named.md)<!--rehype:style=background: rgb(16 185 129/var(\-\-bg\-opacity));&class=tag&data-lang=CSS-->
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[HTTP 状态码](./docs/http-status-code.md)<!--rehype:style=background: rgb(16 185 129/var(\-\-bg\-opacity));-->
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236
docs/jq.md
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236
docs/jq.md
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jq 备忘清单
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===
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这个快速参考备忘单提供了使用 [jq](https://stedolan.github.io/jq/) 命令的各种方法。
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入门
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----
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### 介绍
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jq 就像用于 JSON 数据的 [sed](./sed.md) - 您可以使用它来切片、过滤、映射和转换结构化数据
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- [jq 官网](https://stedolan.github.io/jq/) _(stedolan.github.io)_
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- [jq 命令使用](https://jaywcjlove.github.io/linux-command/c/jq.html) _(jaywcjlove.github.io)_
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安装
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```bash
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$ sudo apt-get install jq # Debian& Ubuntu
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$ sudo dnf install jq # Fedora
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$ sudo zypper install jq # openSUSE
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$ sudo pacman -S jq # Arch
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$ brew install jq # macOS & Homebrew
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$ port install jq # macOS & MacPorts
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```
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语法
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```bash
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$ jq [options] <jq filter> [file...]
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$ jq [options] --args <jq filter> [strings...]
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$ jq [options] --jsonargs <jq filter> [JSON_TEXTS...]
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```
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<!--rehype:className=wrap-text -->
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### 选项
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<!--rehype:wrap-class=col-span-2-->
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:- | -
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:- | -
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`-c` | 紧凑而不是漂亮的输出
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`-n` | 使用`null`作为单个输入值
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`-e` | 根据输出设置退出状态代码
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`-s` | 将所有输入读取（吸取）到数组中；应用过滤器
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`-r` | 输出原始字符串，而不是JSON文本
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`-R` | 读取原始字符串，而不是JSON文本
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`-C` | 为 JSON 着色
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`-M` | 单色（不要为JSON着色）
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`-S` | 在输出上排序对象的键
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`--tab` | 使用制表符进行缩进
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`--arg a v` | 将变量 `$a` 设置为 value `<v>`
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`--argjson a v` | 将变量 `$a` 设置为 JSON value `<v>`
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`--slurpfile a f` | 将变量 `$a` 设置为从`<f>`读取的JSON文本数组
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`--rawfile a f` | 将变量 `$a` 设置为包含`<f>`内容的字符串
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`--args` | 其余参数是字符串参数，而不是文件
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`--jsonargs` | 其余的参数是JSON参数，而不是文件
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`--` | 终止参数处理
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学习示例
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---
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### 获取一个键的值
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```bash
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$ echo '{"foo": 42, "bar": "less interesting data"}' | jq '.foo'
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```
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<!--rehype:className=wrap-text -->
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输出结果
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```bash
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42
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```
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### 数组运算
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```bash
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$ echo '[{"name":"JSON", "good":true}, {"name":"XML", "good":false}]' | jq '.[1]'
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```
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<!--rehype:className=wrap-text -->
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输出结果
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```bash
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{
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"name": "XML",
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"good": false
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}
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```
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### 构造一个数组/对象
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```bash
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$ echo '{"user":"stedolan","titles":["JQ Primer", "More JQ"]}' | jq '{user, title: .titles[]}'
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```
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<!--rehype:className=wrap-text -->
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输出结果
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```bash
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{
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"user": "stedolan",
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"title": "JQ Primer"
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}
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{
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"user": "stedolan",
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"title": "More JQ"
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}
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```
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### 计算一个值的长度
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```bash
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$ echo '[[1,2], "string", {"a":2}, null]' | jq '.[] | length'
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```
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<!--rehype:className=wrap-text -->
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输出结果
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```bash
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2
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6
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1
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0
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```
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### 取出数组中的键
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```bash
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$ echo '{"abc": 1, "abcd": 2, "Foo": 3}' | jq 'keys'
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```
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<!--rehype:className=wrap-text -->
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输出结果
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```bash
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[
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"Foo",
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"abc",
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"abcd"
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]
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```
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### 使用多个过滤器
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```bash
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$ echo '{ "foo": 42, "bar": "something else", "baz": true}' | jq '.foo, .bar'
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```
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<!--rehype:className=wrap-text -->
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输出结果
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```bash
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42
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"something else"
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```
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### 管道传递给下一个过滤器
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```bash
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$ echo '[{"name":"JSON", "good":true}, {"name":"XML", "good":false}]' | jq '.[] | .name'
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```
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<!--rehype:className=wrap-text -->
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输出结果
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```bash
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"JSON"
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"XML"
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```
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### 条件语句判断
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```bash
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$ echo '[1,5,3,0,7]' | jq 'map(select(. >= 2))'
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```
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<!--rehype:className=wrap-text -->
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输出结果
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```bash
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[
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5,
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3,
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7
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]
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```
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### 每个输入调用过滤器
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```bash
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$ echo '[1,2,3]' | jq 'map(.+1)'
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```
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输出结果
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```bash
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[
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2,
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3,
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4
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]
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```
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### 条件判断
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```bash
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$ echo '2' | jq 'if . == 0 then "zero" elif . == 1 then "one" else "many" end'
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```
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<!--rehype:className=wrap-text -->
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输出结果
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```bash
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"many"
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```
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### 字符串插入值并进行运算
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```bash
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$ echo '42' | jq '"The input was \(.), which is one less than \(.+1)"'
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```
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<!--rehype:className=wrap-text -->
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输出结果
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```bash
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"The input was 42, which is one less than 43"
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```
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<!--rehype:className=wrap-text -->
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另见
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----
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- [jq 官网](https://stedolan.github.io/jq/) _(stedolan.github.io)_
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- [jq 命令使用](https://jaywcjlove.github.io/linux-command/c/jq.html) _(jaywcjlove.github.io)_
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