chore: update workflows config.

released v1.20.0
feat: add latex.md #47
2025-06-17 20:51:21 +08:00 · 2022-11-13 23:26:22 +08:00 · 2022-11-13 23:25:29 +08:00 · 2022-11-13 23:20:45 +08:00 · 2022-11-13 16:19:51 +08:00 · 2022-11-13 14:20:13 +08:00
22 changed files with 2877 additions and 401 deletions
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -18,11 +18,26 @@ jobs:

      - name: Generate Contributors Images
        uses: jaywcjlove/github-action-contributors@main
+        id: contributors
        with:
          filter-author: (renovate\[bot\]|renovate-bot|dependabot\[bot\])
          output: dist/CONTRIBUTORS.svg
          avatarSize: 42

+      - name: Modify CONTRIBUTING.md
+        uses: jaywcjlove/github-action-modify-file-content@main
+        with:
+          path: CONTRIBUTING.md
+          body: |
+            ${{steps.contributors.outputs.htmlTable}}
+
+      - name: Modify README.md
+        uses: jaywcjlove/github-action-modify-file-content@main
+        with:
+          path: README.md
+          body: |
+            ${{steps.contributors.outputs.htmlList}}
+
      - name: Create Tag
        id: create_tag
        uses: jaywcjlove/create-tag-action@main
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@ -83,4 +83,49 @@ npm run build  # 编译输出 HTML
 npm run start  # 监听 md 文件编译输出 HTML
 ```

- 或者你也可以使用 `pnpm` 或者 `yarn` 做为包管理器
+或者你也可以使用 `pnpm` 或者 `yarn` 做为包管理器
+
+
+## 贡献
+
+请参阅[贡献指南](./CONTRIBUTING.md)了解如何开始。一如既往，感谢我们出色的贡献者！
+
+<!--GAMFC--><a href="https://github.com/jaywcjlove" title="小弟调调™">
+  <img src="https://avatars.githubusercontent.com/u/1680273?v=4" width="42;" alt="小弟调调™"/>
+</a>
+<a href="https://github.com/Jack-Zhang-1314" title="fw_qaq">
+  <img src="https://avatars.githubusercontent.com/u/82551626?v=4" width="42;" alt="fw_qaq"/>
+</a>
+<a href="https://github.com/catcto" title="喵仙人">
+  <img src="https://avatars.githubusercontent.com/u/5467932?v=4" width="42;" alt="喵仙人"/>
+</a>
+<a href="https://github.com/demigodliu" title="DemigodLiu">
+  <img src="https://avatars.githubusercontent.com/u/30372735?v=4" width="42;" alt="DemigodLiu"/>
+</a>
+<a href="https://github.com/JetSquirrel" title="JetSquirrel">
+  <img src="https://avatars.githubusercontent.com/u/20291255?v=4" width="42;" alt="JetSquirrel"/>
+</a>
+<a href="https://github.com/gaoxiaoduan" title="coderduan">
+  <img src="https://avatars.githubusercontent.com/u/69953511?v=4" width="42;" alt="coderduan"/>
+</a>
+<a href="https://github.com/hweining" title="hweining">
+  <img src="https://avatars.githubusercontent.com/u/8973985?v=4" width="42;" alt="hweining"/>
+</a>
+<a href="https://github.com/liliangrong777" title="liliangrong777">
+  <img src="https://avatars.githubusercontent.com/u/58727146?v=4" width="42;" alt="liliangrong777"/>
+</a>
+<a href="https://github.com/onewesong" title="onewesong">
+  <img src="https://avatars.githubusercontent.com/u/17920822?v=4" width="42;" alt="onewesong"/>
+</a>
+<a href="https://github.com/ryanhex53" title="ryanhex53">
+  <img src="https://avatars.githubusercontent.com/u/360426?v=4" width="42;" alt="ryanhex53"/>
+</a>
+<a href="https://github.com/zxx-457" title="zxx-457">
+  <img src="https://avatars.githubusercontent.com/u/114141362?v=4" width="42;" alt="zxx-457"/>
+</a><!--GAMFC-END-->
+
+上图贡献者列表，由 [contributors](https://github.com/jaywcjlove/github-action-contributors) 自动生成贡献者图片。
+
+## License
+
+MIT © [Kenny Wong](https://github.com/jaywcjlove)
--- a/README.md
+++ b/README.md
@ -23,6 +23,7 @@ Quick Reference
 [CMake](./docs/cmake.md)<!--rehype:style=background: rgb(92 107 192/var(\-\-bg\-opacity));&class=contributing-->
 [Django](./docs/djiango.md)<!--rehype:style=background: rgb(12 75 51/var(\-\-bg\-opacity));&class=contributing tag&data-lang=Python-->
 [FFmpeg](./docs/ffmpeg.md)<!--rehype:style=background: rgb(0 193 9/var(\-\-bg\-opacity));&class=contributing-->
+[LaTeX](./docs/latex.md)<!--rehype:style=background: rgb(0 128 128/var(\-\-bg\-opacity));&class=contributing-->
 [MATLAB](./docs/matlab.md)<!--rehype:style=background: rgb(0 118 168/var(\-\-bg\-opacity));&class=contributing-->
 [Vue 3 ](./docs/vue.md)<!--rehype:style=background: rgb(64 184 131/var(\-\-bg\-opacity));&class=contributing-->
 <!--rehype:class=home-card-->
@ -31,6 +32,7 @@ Quick Reference

 [Bash](./docs/bash.md)<!--rehype:style=background: rgb(72 143 223/var(\-\-bg\-opacity));-->
 [C](./docs/c.md)<!--rehype:style=background: rgb(92 107 192/var(\-\-bg\-opacity));-->
+[Dart](./docs/dart.md)<!--rehype:style=background: rgb(64 196 255/var(\-\-bg\-opacity));-->
 [Docker](./docs/docker.md)<!--rehype:style=background: rgb(72 143 223/var(\-\-bg\-opacity));-->
 [Dockerfile](./docs/dockerfile.md)<!--rehype:style=background: rgb(0 72 153/var(\-\-bg\-opacity));&class=tag&data-lang=Docker-->
 [Django](./docs/djiango.md)<!--rehype:style=background: rgb(12 75 51/var(\-\-bg\-opacity));&class=contributing tag&data-lang=Python-->
@ -39,12 +41,14 @@ Quick Reference
 [INI](./docs/ini.md)<!--rehype:style=background: rgb(57 59 60/var(\-\-bg\-opacity));-->
 [JSON](./docs/json.md)<!--rehype:style=background: rgb(57 59 60/var(\-\-bg\-opacity));-->
 [Java](./docs/java.md)<!--rehype:style=background: rgb(211 55 49/var(\-\-bg\-opacity));&class=contributing&data-info=👆看看还缺点儿什么？-->
+[LaTeX](./docs/latex.md)<!--rehype:style=background: rgb(0 128 128/var(\-\-bg\-opacity));&class=contributing-->
 [Markdown](./docs/markdown.md)<!--rehype:style=background: rgb(103 61 156/var(\-\-bg\-opacity));-->
-[MySQL](./docs/mysql.md)<!--rehype:style=background: rgb(103 61 156/var(\-\-bg\-opacity));&class=tag&data-lang=SQL-->
+[MySQL](./docs/mysql.md)<!--rehype:style=background: rgb(1 117 143/var(\-\-bg\-opacity));&class=tag&data-lang=SQL-->
 [MATLAB](./docs/matlab.md)<!--rehype:style=background: rgb(0 118 168/var(\-\-bg\-opacity));&class=contributing-->
-[Python](./docs/python.md)<!--rehype:style=background: rgb(240 81 57/var(\-\-bg\-opacity));-->
+[PHP](./docs/php.md)<!--rehype:style=background: rgb(79 91 147/var(\-\-bg\-opacity));-->
+[Python](./docs/python.md)<!--rehype:style=background: rgb(43 91 132/var(\-\-bg\-opacity));-->
 [PostgreSQL](./docs/postgres.md)<!--rehype:style=background: rgb(43 109 163/var(\-\-bg\-opacity));&class=tag&data-lang=SQL-->
-[Ruby](./docs/ruby.md)<!--rehype:style=background: rgb(71 71 71/var(\-\-bg\-opacity));-->
+[Ruby](./docs/ruby.md)<!--rehype:style=background: rgb(204 52 45/var(\-\-bg\-opacity));-->
 [Rust](./docs/rust.md)<!--rehype:style=background: rgb(71 71 71/var(\-\-bg\-opacity));-->
 [Swift](./docs/swift.md)<!--rehype:style=background: rgb(240 81 57/var(\-\-bg\-opacity));-->
 [SwiftUI](./docs/swiftui.md)<!--rehype:style=background: rgb(10 127 247/var(\-\-bg\-opacity));&class=tag&data-lang=swift-->
@ -147,17 +151,50 @@ Quick Reference
 [`我有一张备忘单(速查表)`](https://github.com/jaywcjlove/reference/blob/main/CONTRIBUTING.md)<!--rehype:class=home-button text-grey&target=__blank-->
 <!--rehype:style=margin-top:3rem-->

-<!--rehype:ignore:start-->
-## 贡献
+## 感谢所有贡献者
+<!--rehype:wrap-style=text-align: center;max-width: 650px;margin: 0 auto;&class=home-title-reset-->

-请参阅[贡献指南](./CONTRIBUTING.md)了解如何开始。一如既往，感谢我们出色的贡献者！
+请参阅 [Quick Reference](./docs/quickreference.md) 了解如何开始。一如既往，感谢我们出色的贡献者！
+<!--rehype:style=padding-bottom:1rem;-->

-<a href="https://github.com/jaywcjlove/reference/graphs/contributors">
-  <img src="https://jaywcjlove.github.io/reference/CONTRIBUTORS.svg" />
+<!--GAMFC--><a href="https://github.com/jaywcjlove" title="小弟调调™">
+  <img src="https://avatars.githubusercontent.com/u/1680273?v=4" width="42;" alt="小弟调调™"/>
 </a>
+<a href="https://github.com/Jack-Zhang-1314" title="fw_qaq">
+  <img src="https://avatars.githubusercontent.com/u/82551626?v=4" width="42;" alt="fw_qaq"/>
+</a>
+<a href="https://github.com/catcto" title="喵仙人">
+  <img src="https://avatars.githubusercontent.com/u/5467932?v=4" width="42;" alt="喵仙人"/>
+</a>
+<a href="https://github.com/demigodliu" title="DemigodLiu">
+  <img src="https://avatars.githubusercontent.com/u/30372735?v=4" width="42;" alt="DemigodLiu"/>
+</a>
+<a href="https://github.com/JetSquirrel" title="JetSquirrel">
+  <img src="https://avatars.githubusercontent.com/u/20291255?v=4" width="42;" alt="JetSquirrel"/>
+</a>
+<a href="https://github.com/gaoxiaoduan" title="coderduan">
+  <img src="https://avatars.githubusercontent.com/u/69953511?v=4" width="42;" alt="coderduan"/>
+</a>
+<a href="https://github.com/hweining" title="hweining">
+  <img src="https://avatars.githubusercontent.com/u/8973985?v=4" width="42;" alt="hweining"/>
+</a>
+<a href="https://github.com/liliangrong777" title="liliangrong777">
+  <img src="https://avatars.githubusercontent.com/u/58727146?v=4" width="42;" alt="liliangrong777"/>
+</a>
+<a href="https://github.com/onewesong" title="onewesong">
+  <img src="https://avatars.githubusercontent.com/u/17920822?v=4" width="42;" alt="onewesong"/>
+</a>
+<a href="https://github.com/ryanhex53" title="ryanhex53">
+  <img src="https://avatars.githubusercontent.com/u/360426?v=4" width="42;" alt="ryanhex53"/>
+</a>
+<a href="https://github.com/zxx-457" title="zxx-457">
+  <img src="https://avatars.githubusercontent.com/u/114141362?v=4" width="42;" alt="zxx-457"/>
+</a><!--GAMFC-END-->

-上图贡献者列表，由 [contributors](https://github.com/jaywcjlove/github-action-contributors) 自动生成贡献者图片。
+贡献者列表，由 [contributors](https://github.com/jaywcjlove/github-action-contributors) 自动生成
+<!--rehype:style=padding-top:1rem;-->

+<!--rehype:ignore:start-->
 ## License

 MIT © [Kenny Wong](https://github.com/jaywcjlove)
--- a/docs/cron.md
+++ b/docs/cron.md
@ -92,8 +92,9 @@ Min  Hour Day  Mon  Weekday
 `问号(?)`  | 可以代替“*”并允许用于月份和星期几。使用仅限于 cron 表达式中的 `月份中的某天` 或 `星期几`。
 <!--rehype:className=show-header auto-wrap-->

-## Also see
+另见
+----

-* [Devhints](https://devhints.io/cron) _(devhints.io)_
-* [Crontab Generator](https://crontab-generator.org/) _(crontab-generator.org)_
-* [Crontab guru](https://crontab.guru/) _(crontab.guru)_
+- [Devhints](https://devhints.io/cron) _(devhints.io)_
+- [Crontab Generator](https://crontab-generator.org/) _(crontab-generator.org)_
+- [Crontab guru](https://crontab.guru/) _(crontab.guru)_
--- a/docs/css.md
+++ b/docs/css.md
@ -250,10 +250,10 @@ p:first-child {
 :- | :-
 `div.classname` | 具有特定类名的 div
 `div#idname`    | 具有特定 ID 的 div
-`div p`         | div 中的段落
-`div > p`       | div 子节点中的所有 `P` 标签
-`div + p`       | div 之后的 `P` 标签
-`div ~ p`       | div 前面的 `P` 标签
+`div p`         | div 中的所有段落
+`div > p`       | 父元素是 div 的 `P` 标签
+`div + p`       | div 之后的第一个同级 `P` 标签
+`div ~ p`       | div 之后所有的同级 `P` 标签

 另见: [相邻兄弟](https://developer.mozilla.org/zh-CN/docs/Web/CSS/Adjacent_sibling_combinator) / [通用兄弟](https://developer.mozilla.org/zh-CN/docs/Web/CSS/General_sibling_combinator) / [子](https://developer.mozilla.org/zh-CN/docs/Web/CSS/Child_combinator) 选择器

--- a/docs/dart.md
+++ b/docs/dart.md
@ -0,0 +1,598 @@
+Dart 备忘清单
+===
+
+包含最重要概念、功能、方法等的 [Dart](https://dart.dev/) 备忘单。初学者的完整快速参考
+
+入门
+-----
+
+### 安装 Dart
+<!--rehype:wrap-class=row-span-2-->
+
+#### Windows
+
+```bash
+C:\> choco install dart-sdk # Windows
+```
+
+#### Linux
+
+执行以下一次性设置
+
+```bash
+$ sudo apt-get update
+$ sudo apt-get install apt-transport-https
+$ wget -qO- https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo gpg --dearmor -o /usr/share/keyrings/dart.gpg
+$ echo 'deb [signed-by=/usr/share/keyrings/dart.gpg arch=amd64] https://storage.googleapis.com/download.dartlang.org/linux/debian stable main' | sudo tee /etc/apt/sources.list.d/dart_stable.list
+```
+
+安装 Dart SDK
+
+```bash
+$ sudo apt-get update
+$ sudo apt-get install dart
+```
+
+#### Mac
+
+```bash
+$ brew tap dart-lang/dart
+$ brew install dart
+```
+
+### hello.dart
+
+```dart
+// 应用执行开始的顶级函数
+void main() {
+    print("Hello World!"); // 打印到控制台
+}
+```
+
+每个应用程序都有一个 `main()` 函数
+
+#### Windows
+
+```bash
+$ dart compile exe hellow.dart
+$ time ./hello.exe
+Hello World!
+```
+
+### 变量
+
+```dart
+int x = 2; // 显式键入
+var p = 5; // 类型推断 - 具有类型推断的通用var
+dynamic z = 8; // 变量可以采用任何类型
+z = "cool"; // cool
+
+// 如果您从不打算更改变量，请使用 final 或 const
+// 像这样的东西：
+final email = "temid@gmail.com";
+// 与 var 相同，但不能重新分配
+final String email = "temid@gmail.com";
+// 你不能改变价值
+const qty = 5; // 编译时常数
+```
+
+### 数据类型
+<!--rehype:wrap-class=row-span-2-->
+
+```dart
+// 整数，范围 -2^63 到 2^63 - 1
+int age = 20;
+// 浮点数字
+
+double height = 1.85;
+// 您还可以将变量声明为 num
+// x 可以同时具有 int 和 double 值
+num x = 1;
+num += 2.5;
+print(num); // 打印: 3.5
+
+String name = "Nicola";
+bool isFavourite = true;
+bool isLoaded = false;
+```
+
+### 注释
+
+```dart
+// 这是一条正常的单行注释
+/// 这是一个文档注释，用于文档库，
+/// 类及其成员。 IDE 和 dartdoc 等工具
+/// doc 特别注释。
+/* 也支持此类注释 */
+```
+
+### 字符串插值
+
+```dart
+// 可以对字符串类型使用单引号或双引号
+var firstName = 'Nicola';
+var lastName = "Tesla";
+// 可以用 $ 将变量嵌入到字符串中
+String fullName = "$firstName $lastName";
+// 与 + 连接
+var name = "Albert " + "Einstein";
+String upperCase = '${firstName.toUpperCase()}';
+print(upperCase); // 打印: NICOLA
+```
+<!--rehype:className=wrap-text -->
+
+### 导入 Imports
+
+```dart
+// 导入核心库
+import 'dart:math';
+// 从外部包导入库
+import 'package:test/test.dart';
+// 导入文件
+import 'path/to/my_other_file.dart';
+```
+
+操作符
+-------
+
+### 算术运算符
+<!--rehype:wrap-class=row-span-2-->
+
+```dart
+print(2 + 3);  // 打印: 5
+print(2 - 3);  // 打印: -1
+print(2 * 3);  // 打印: 6
+print(5 / 2);  // 打印: 2.5 - 结果是 double
+print(5 ~/ 2); // 打印: 2 - 结果是n int
+print(5 % 2);  // 打印: 1 - 余
+int a = 1, b;
+```
+
+----
+
+```dart
+// 增
+b = ++a; // 前增量 - 在 b 获得其值之前增加 a
+b = a++; // 后增量 - 在 b 获得它的值之后增加 a
+// 递
+b = --a; // 前减量 - 在 b 获得它的值之前减少 a
+b = a--; // 后减量 - 在 b 获得它的值之后递减 a
+```
+
+### 逻辑运算符
+<!--rehype:wrap-class=col-span-2-->
+
+```dart
+// !expr 反转表达式（将 false 更改为 true，反之亦然）
+// ||  逻辑或
+// &&  逻辑与
+bool isOutOfStock = false;
+int quantity = 3;
+if (!isOutOfStock && (quantity == 2 || quantity == 3)) {
+  // ...Order the product...
+}
+```
+
+### 等式和关系运算符
+
+```dart
+print(2 == 2); // 打印: true - 平等的
+print(2 != 3); // 打印: true - 不相等
+print(3 > 2);  // 打印: true - 比...更棒
+print(2 < 3);  // 打印: true - 少于
+print(3 >= 3); // 打印: true - 大于或等于
+print(2 <= 3); // 打印: true - 小于或等于
+```
+
+控制流：条件
+------
+
+### if 和 else if
+
+```dart
+if(age < 18){
+    print("Teen");
+} else if( age > 18 && age <60){
+    print("Adult");
+} else {
+    print("Old");
+}
+```
+
+### switch case
+
+```dart
+enum Pet {dog, cat}
+Pet myPet = Pet.dog;
+switch(myPet){
+    case Pet.dog:
+        print('My Pet is Dog.');
+        break;
+    case Pet.cat:
+        print('My Pet is Cat.');
+        break;
+    default:
+        print('I don\'t have a Pet');
+}
+// 打印: My Pet is Dog.
+```
+
+控制流：循环
+-----
+
+### while 循环
+
+```dart
+while (!dreamsAchieved) {
+  workHard();
+}
+```
+
+循环迭代之前的 `while` 循环检查条件
+
+### do-while 循环
+
+```dart
+do {
+  workHard();
+} while (!dreamsAchieved);
+```
+
+`do-while` 循环在执行循环内的语句后验证条件
+
+### for 循环
+
+```dart
+for(int i=0; i< 10; i++){
+    print(i);
+}
+var numbers = [1,2,3];
+// 列表的 for-in 循环
+for(var number in numbers){
+    print(number);
+}
+```
+
+Collections
+------------
+
+### Lists
+<!--rehype:wrap-class=col-span-2-->
+
+```dart
+// 有序的对象组
+var list = [1, 2, 3];
+print(list.length); //Print: 3
+print(list[1]); //Print: 2
+// 列表声明和初始化的其他方式
+List<String> cities = <String>["New York", "Mumbai", "Tokyo"];
+// 创建一个编译时常量的列表
+const constantCities = const ["New York", "Mumbai", "Tokyo"];
+```
+
+### Maps
+<!--rehype:wrap-class=row-span-2-->
+
+```dart
+// 映射是关联键和值的对象
+var person = Map<String, String>();
+// 要初始化地图，请执行以下操作：
+person['firstName'] = 'Nicola';
+person['lastName'] = 'Tesla';
+print(person);
+// 打印: {firstName:Nicola, lastName:Tesla}
+print(person['lastName']);
+// 打印: Tesla
+
+var nobleGases = {
+  // Key: Value
+  2: 'helium',
+  10: 'neon',
+  18: 'argon',
+};
+```
+
+### Sets
+<!--rehype:wrap-class=col-span-2-->
+
+```dart
+// Dart 中的集合是唯一项的无序集合
+var halogens = {'fluorine', 'chlorine', 'bromine', 'iodine', 'astatine'};
+// 创建一个空集
+var names = <String>{};
+Set<String> names = {}; // 这也有效
+//var names = {}; // 创建地图，而不是集合
+```
+
+函数
+------
+
+### 函数示例
+
+```dart
+// dart 中的函数是对象并且有一个类型
+int add(int a, int b){
+    return a+b;
+}
+// 函数可以分配给变量
+int sum = add(2,3); // 回报：5
+// 可以作为参数传递给其他函数
+int totalSum = add(2, add(2,3)); // 返回：7
+```
+
+### 箭头语法 (=>)
+
+```dart
+// 只包含一个表达式的函数，您可以使用简写语法
+bool isFav(Product product) => favProductsList.contains(product);
+```
+<!--rehype:className=wrap-text-->
+
+### Anonymous (lambda) functions
+
+```dart
+// 没有名字的小单行函数
+int add(a,b) => a+b;
+// lambda 函数大多作为参数传递给其他函数
+const list = [
+  'apples', 'bananas', 'oranges'
+];
+
+list.forEach(
+  (item) =>
+    print('${list.indexOf(item)}: $item')
+);
+// 打印: 0: apples 1: bananas 2: oranges
+```
+<!--rehype:className=wrap-text-->
+
+类和对象
+----------
+
+### 类 Class
+
+```dart
+class Cat {
+    String name;
+    // 方法
+    void voice(){
+        print("Meow");
+    }
+}
+```
+
+### 对象 Object
+
+```dart
+// 类的实例
+// 在 myCat 下面是 Cat 类的对象
+void main(){
+    Cat myCat = Cat();
+    myCat.name = "Kitty";
+    myCat.voice(); // 打印: Meow
+}
+```
+
+### 构造函数
+
+```dart
+class Cat {
+    String name;
+    Cat(this.name);
+}
+void main(){
+    Cat myCat = Cat("Kitty");
+    print(myCat.name); // 打印: Kitty
+}
+```
+
+### 抽象类
+
+```dart
+// 抽象类——不能实例化的类
+// 这个类被声明为抽象的，因此不能被实例化
+abstract class AbstractContainer {
+  // 定义构造函数、字段、方法...
+  void updateChildren(); // 抽象方法
+}
+```
+
+### Getters Setters
+
+```dart
+// 提供对对象属性的读写访问
+class Cat {
+    String name;
+    // getter
+    String get catName {
+        return name;
+    }
+    // setter
+    void set catName(String name){
+        this.name = name;
+    }
+}
+```
+
+隐式接口
+------------
+
+### 一个基本的界面
+<!--rehype:wrap-class=col-span-2-->
+
+```dart
+// 一个人。隐式接口包含 greet()。
+class Person {
+  // 在接口中，但仅在此库中可见。
+  final String _name;
+  // 不在接口中，因为这是一个构造函数。
+  Person(this._name);
+  // 在接口中
+  String greet(String who) => 'Hello, $who. I am $_name.';
+}
+// Person 接口的实现。
+class Impostor implements Person {
+  String get _name => '';
+  String greet(String who) => 'Hi $who. Do you know who I am?';
+}
+String greetBob(Person person) => person.greet('Bob');
+void main() {
+  print(greetBob(Person('Kathy')));
+  // 打印: Hello, Bob. I am Kathy.
+  print(greetBob(Impostor()));
+  // 打印: Hi Bob. Do you know who I am?
+}
+```
+
+### 扩展类
+
+```dart
+class Phone {
+    void use(){
+        _call();
+        _sendMessage();
+    }
+}
+// 使用 extends 创建子类
+class SmartPhone extends Phone {
+    void use(){
+        // 使用 super 来引用超类
+        super.use();
+        _takePhotos();
+        _playGames();
+    }
+}
+```
+
+异常
+-----
+
+### Throw
+
+```dart
+// 抛出 throws 或引发 raises 和异常 exception
+throw IntegerDivisionByZeroException();
+// 你也可以抛出任意对象
+throw "Product out of stock!";
+```
+
+### Catch
+
+```dart
+try {
+    int c = 3/0;
+    print(c);
+} on IntegerDivisionByZeroException {
+    // 一个特定的异常
+    print('Can not divide integer by 0.')
+} on Exception catch (e) {
+    // 任何其他异常情况
+    print('Unknown exception: $e');
+} catch (e) {
+    // 没有指定类型，处理所有
+    print('Something really unknown: $e');
+}
+```
+
+### Finally
+
+```dart
+// 确保某些代码无论是否抛出异常都能运行
+try {
+  cookFood();
+} catch (e) {
+  print('Error: $e'); // 先处理异常
+} finally {
+  cleanKitchen();     // 然后清理
+}
+```
+
+Futures
+------------
+
+### Async Await
+
+```dart
+// 异步函数：它们在设置可能耗时的操作后返回
+// async 和 await 关键字支持异步编程
+Future<String> login() {
+  String userName="Temidjoy";
+  return
+    Future.delayed(
+      Duration(seconds: 4), () => userName
+    );
+}
+// 异步
+main() async {
+  print('Authenticating please wait...');
+  print(await userName());
+}
+```
+
+各种各样的
+------------
+
+### Null 和 Null 感知
+<!--rehype:wrap-class=col-span-2-->
+
+```dart
+int x; // 任何对象的初始值为 null
+// ?? 空感知运算符
+x ??=6;   // ??= 赋值运算符，仅当变量当前为 null 时才为其赋值
+print(x); // 打印: 6
+x ??=3;
+print(x); // 打印: 6 - 结果仍然是 6
+print(null ?? 10); // 打印: 10。如果不为空，则显示左侧的值，否则返回右侧的值
+```
+
+### 三元运算符
+
+```dart
+// 条件 ? 条件如果为真 : 条件如果为假
+bool isAvailable;
+isAvailable ? orderproduct() : addToFavourite();
+```
+<!--rehype:className=wrap-text-->
+
+### 条件属性访问
+<!--rehype:wrap-class=col-span-2-->
+
+```dart
+userObject?.userName
+// 上面的代码片段等效于以下代码：
+(userObject != null) ? userObject.userName : null
+// 您可以将 ? 的多种用途链接起来。一起在一个表达式中
+userObject?.userName?.toString()
+// 如果 userObject 或 userObject.userName 为 null，则前面的代码返回 null 并且从不调用 toString()
+```
+
+### 级联符号 (..)
+<!--rehype:wrap-class=row-span-2-->
+
+```dart
+// 允许您对同一对象进行一系列操作
+// 而不是这样做
+var user = User();
+user.name = "Nicola";
+user.email = "nicola@g.c";
+user.age = 24;
+// 你可以这样做
+var user = User()
+  ..name = "Nicola"
+  ..email = "nicola@g.c"
+  ..age = 24;
+```
+
+### 扩展运算符 (...)
+
+```dart
+// 将多个值插入到集合中
+var list = [1, 2, 3];
+var list2 = [0, ...list];
+print(list2.length); // 打印: 4
+```
+
+另见
+----
+
+- [Dart 官方文档](https://dart.dev/) _(dart.dev)_
--- a/docs/ffmpeg.md
+++ b/docs/ffmpeg.md
@ -121,33 +121,17 @@ $ ffmpeg -i movie.webm movie.mp4
 ---
 <!--rehype:body-class=cols-2-->

-### 裁剪
-<!--rehype:wrap-class=row-span-2-->
+### 剪切视频部分
+<!--rehype:wrap-class=col-span-2-->

 ```bash
-$ ffmpeg -i <input> -filter:v "crop=640:480:100:25" <output>
-```
-<!--rehype:className=wrap-text -->
-
-通过从输入视频中复制偏移 `x=100px` `y=25px` 的相应窗口来创建 `640x480` 大小的输出视频
-
-```bash
-# 裁剪到宽度 360，高度 640
-$ ffmpeg -i input.mov -filter:v 'crop=360:640:0:0' -codec:a copy output.mov
-```
-<!--rehype:className=wrap-text -->
-
-裁剪到宽度 360，高度 640，从坐标 (10, 20) 开始
-
-```bash
-$ ffmpeg -i input.mov -filter:v 'crop=360:640:10:20' -codec:a copy output.mov
-```
-<!--rehype:className=wrap-text -->
-
-### 缩放
-
-```bash
-$ ffmpeg -i <输入> -vf scale=640:480 <输出>
+# 从1分45秒开始剪切2分35秒
+$ ffmpeg -i <input> -ss 00:01:45 -t 00:02:35 -vcodec copy -acodec copy <output>
+# 从1分45秒开始剪切到第4分20秒，与上一行等效
+$ ffmpeg -i <input> -ss 00:01:45 -to 00:04:20 -codec copy <output>
+$ ffmpeg -ss 00:00:30 -i orginalfile.mpg -t 00:00:05 -vcodec copy -acodec copy newfile.mpg
+# 从 4.5 秒开始的 5 秒长的视频
+$ ffmpeg -i in.mp4 -ss 4.5 -t 5 out.mp4
 ```
 <!--rehype:className=wrap-text -->

@ -165,20 +149,6 @@ $ ffmpeg -r 1 -i input.m2v -r 24 output.avi

 将输入文件的帧速率(仅对原始格式有效)强制为 1 fps，将输出文件的帧速率强制为 24 fps

-### 剪切视频部分
-<!--rehype:wrap-class=col-span-2-->
-
-```bash
-# 从1分45秒开始剪切2分35秒
-$ ffmpeg -i <input> -ss 00:01:45 -t 00:02:35 -vcodec copy -acodec copy <output>
-# 从1分45秒开始剪切到第4分20秒，与上一行等效
-$ ffmpeg -i <input> -ss 00:01:45 -to 00:04:20 -codec copy <output>
-$ ffmpeg -ss 00:00:30 -i orginalfile.mpg -t 00:00:05 -vcodec copy -acodec copy newfile.mpg
-# 从 4.5 秒开始的 5 秒长的视频
-$ ffmpeg -i in.mp4 -ss 4.5 -t 5 out.mp4
-```
-<!--rehype:className=wrap-text -->
-
 ### H265 2-pass 编码
 <!--rehype:wrap-class=row-span-2-->

@ -212,14 +182,6 @@ $ ffmpeg -i <input> -c copy -metadata:s:v:0 rotate=90 <output>

 不要为旋转重新编码，而是简单地为旋转角度添加一个视频元数据字段

-### 放慢视频速度
-
-```bash
-$ ffmpeg -i in.mp4 -filter:v "setpts=4.0*PTS" out.mp4
-```
-
-使用过滤器减慢视频。 此示例将视频减慢四倍
-
 ### 缩放到特定宽度

 ```bash
@ -240,23 +202,6 @@ $ ffmpeg -i file.mp4 -vn -c copy output.aac

 `-vn` (过滤视频)，使用 `-c copy`，不会重新解码和编码，加快速度。

-### 创建缩略图
-<!--rehype:wrap-class=row-span-2-->
-
-在 10 秒时创建一个缩略图
-
-```bash
-$ ffmpeg -ss 10 -i <input file> -vframes 1 -vcodec png -an thumb.png
-```
-<!--rehype:className=wrap-text -->
-
-例如，要每 `n` 秒创建一次缩略图，请使用 `-vf fps=1/n`
-
-```bash
-$ ffmpeg -i <input file> -vf fps=1/60 thumbnails/thumb%03d.png
-```
-<!--rehype:className=wrap-text -->
-
 ### 提取视频流

 ```bash
@ -289,6 +234,13 @@ $ ffmpeg -i file.aac -acodec mp3 -ar 44100 -ab 128000 output.mp3
 ```
 <!--rehype:className=wrap-text -->

+### 将输入文件转码为 DVD PAL 格式
+
+```bash
+$ ffmpeg -y -threads 8 -i inFile -target pal-dvd -ac 2 -aspect 16:9 -acodec mp2 -ab 224000 -vf pad=0:0:0:0 outFile
+```
+<!--rehype:className=wrap-text -->
+
 ### -map 命令
 <!--rehype:wrap-class=col-span-2 row-span-2-->

@ -399,10 +351,19 @@ $ ffmpeg -hide_banner -loglevel error -stats -f gdigrab -framerate 60 \
 $ ffmpeg -f avfoundation -i 1:0 -preset ultrafast out.mkv
 ```

-### 将输入文件转码为 DVD PAL 格式
+### 合并音频与图片
+
+合并多个音频，自定义背景图片，生成视频音乐

 ```bash
-$ ffmpeg -y -threads 8 -i inFile -target pal-dvd -ac 2 -aspect 16:9 -acodec mp2 -ab 224000 -vf pad=0:0:0:0 outFile
+# mylist.txt >>>
+file '1.mp3'
+file '2.mp3'
+file '3.mp3'
+
+# OBS: 46500 = 25:50 minutes * 60 * 30fps
+# echo "00:25:50" | awk -F: '{ print (($1 * 3600) + ($2 * 60) + $3) * 30 }'
+$ ffmpeg -y -loop 1 -i cover.jpg -f concat -i mylist.txt -c:v libx264 -r 30 -pix_fmt yuv420p -vframes 46500 -c:a aac -b:a 192k -strict experimental -shortest output.mp4
 ```
 <!--rehype:className=wrap-text -->

@ -569,7 +530,7 @@ $ ffmpeg -i audioS.mp4 -i videoS.mp4 -c copy -map 0:a -map 1:v outFile.mp4

 ### 合并视频

-<!--rehype:wrap-class=col-span-2 row-span-3-->
+<!--rehype:wrap-class=col-span-3 row-span-3-->

 合并相同规格(解码/分辨率/帧率)视频

@ -618,29 +579,44 @@ $ ffmpeg -f concat -i mylist.txt -c:v copy -c:a flac -strict -2 output.mp4
 ```
 <!--rehype:className=wrap-text -->

-### 合并音频与图片
+视频过滤器
+---

-合并多个音频，自定义背景图片，生成视频音乐
+### 格式
+
+如果一个 fliter 有多个参数，需要使用 `,` 分隔

 ```bash
-# mylist.txt >>>
-file '1.mp3'
-file '2.mp3'
-file '3.mp3'
+$ ffmpeg -i test.avi -c:v libx264 -vf "scale=1024:-1,transpose=1,crop=iw/3:ih/3" output.mp4
+```

-# OBS: 46500 = 25:50 minutes * 60 * 30fps
-# echo "00:25:50" | awk -F: '{ print (($1 * 3600) + ($2 * 60) + $3) * 30 }'
-$ ffmpeg -y -loop 1 -i cover.jpg -f concat -i mylist.txt -c:v libx264 -r 30 -pix_fmt yuv420p -vframes 46500 -c:a aac -b:a 192k -strict experimental -shortest output.mp4
+### 缩放
+<!--rehype:wrap-class=row-span-2-->
+
+```bash
+$ ffmpeg -i input.mp4 -vf "scale=640:480" out.mp4
+# -1 → 指根据另一个参数帮我们推断
+$ ffmpeg -i input.mp4 -vf "scale=720:-1" out.mp4
+# 宽度和高度
+ffmpeg -i input.mp4 -vf "scale=w=800:h=600" output.mp4
+# in_w\in_h 输入尺寸
+ffmpeg -i input.mkv -vf "scale=w=1/2*in_w:h=1/2*in_h" output.mkv
 ```
 <!--rehype:className=wrap-text -->

-### 添加水印
+### 裁剪
+<!--rehype:wrap-class=row-span-2-->

-在视频左上方 20,20 的位置插入 logo.png 图片
+从左上角开始，复制 `x=0px` `y=0px` 的相应窗口来创建 `1280x720` 大小的输出视频

 ```bash
-# -b:v 548k 可选参数，设置视频比特率，默认 200k 最好设置与原视频一致
-ffmpeg -i 1.mp4 -acodec copy -b:v 548k -vf "movie=logo.png[watermark];[in][watermark]overlay=20:20" output.mp4
+ffmpeg -i input.mp4 -vf "crop=w=1280:h=720:x=0:y=0" output.mp4
+```
+
+裁剪到宽度 360，高度 640，从坐标 (10, 20) 开始
+
+```bash
+$ ffmpeg -i input.mov -vf 'crop=360:640:10:20' output.mov
 ```
 <!--rehype:className=wrap-text -->

@ -654,6 +630,94 @@ ffmpeg -i 1.mp4 -b:v 548k -vf delogo=x=10:y=10:w=120:h=45:show=1 output.mp4
 ```
 <!--rehype:className=wrap-text -->

+### 创建缩略图
+<!--rehype:wrap-class=row-span-2-->
+
+在 10 秒时创建一个缩略图
+
+```bash
+$ ffmpeg -ss 10 -i <input file> -vframes 1 -vcodec png -an thumb.png
+```
+<!--rehype:className=wrap-text -->
+
+例如，要每 `n` 秒创建一次缩略图，请使用 `-vf fps=1/n`
+
+```bash
+$ ffmpeg -i <input file> -vf fps=1/60 thumbnails/thumb%03d.png
+```
+<!--rehype:className=wrap-text -->
+
+### 添加水印
+
+在视频左上方 20,20 的位置插入 logo.png 图片
+
+```bash
+# -b:v 548k 可选参数，设置视频比特率，默认 200k 最好设置与原视频一致
+ffmpeg -i 1.mp4 -acodec copy -b:v 548k -vf "movie=logo.png[watermark];[in][watermark]overlay=20:20" output.mp4
+```
+<!--rehype:className=wrap-text -->
+
+### 视频旋转
+
+```bash
+# 顺时针旋转 90
+$ ffmpeg -i input.avi -vf "rotate=90*PI/180" out.mp4 
+# 顺时针旋转 180，翻转 90
+$ ffmpeg -i input.mp4 -vf "rotate=PI" out.mp4
+```
+
+### 更改视频播放速度
+
+```bash
+# 加速 2 倍
+$ ffmpeg -i input.mkv -vf "setpts=0.5*PTS" output.mkv 
+# 减速 2 倍
+$ ffmpeg -i input.mp4 -vf "setpts=2*PTS" output.mp4
+```
+
+### 添加背景音乐
+
+```bash
+# -t 10 文件时长，单位为秒，建议取值原始视频总时长
+$ ffmpeg -i 1.mp4 -i test.mp3 \
+  -filter_complex "[1:a]aloop=loop=-1:size=2e+09[out];[out][0:a]amix" \
+  -t 10 out.mp4
+```
+
+音频过滤器
+---
+
+### 调节音量
+
+```bash
+# 增大音量
+$ ffmpeg -i test.mp4 -af "volumn=1.5" out.mp4
+```
+
+### 更改音频速度
+<!--rehype:wrap-class=row-span-2-->
+
+```bash
+$ ffmpeg -i input.wav -af "atempo=0.75" output.wav 
+# 加速 4 倍
+$ ffmpeg -i input.mp3 -af "atempo=2.0,atempo=2.0" ouutput.mp3
+```
+
+`atempo` 它只接受 `0.5`(半速) 到 `2` (倍速)之间的值。为了越过这个限制，你可以链式使用这个过滤器
+
+### 统一视频的音量
+
+```bash
+$ ffmpeg -i test.mp4 -af "loudnorm=I=-5:LRA=1" out.mp4
+```
+
+### 重新映射通道数
+
+```bash
+# 使左右耳的声音同时出现
+$ ffmpeg -i input.mp3 -af "channelmap=1-0|1-1" output.mp3
+```
+
 另见
 ---

--- a/docs/latex.md
+++ b/docs/latex.md
@ -0,0 +1,421 @@
+LaTeX 备忘清单
+===
+
+本备忘单总结了 [LaTeX](https://www.latex-project.org/) 常用显示数学符号的参考列表和一些 [KaTeX](https://katex.org/) 的应用示例。
+
+入门
+---
+
+### 介绍
+
+[LaTeX](https://www.latex-project.org/) 基于 TEX 的排版系统，适用于生成高印刷质量的科技和数学、物理文档。
+
+- [LaTeX 官网](https://www.latex-project.org/) _(latex-project.org)_
+- [KaTeX 官网](https://katex.org/) _(katex.org)_
+
+而 [KaTeX](https://katex.org/) 只处理 LaTeX 的数学符号的一个更小的子集，用于 web 上展示
+
+### 示例
+
+```KaTeX
+% \f is defined as #1f(#2) using the macro
+f\relax(x) = \int_{-\infty}^\infty
+    f\hat\xi\,e^{2 \pi i \xi x}
+    \,d\xi
+```
+
+---
+
+```LaTeX
+% \f is defined as #1f(#2) using the macro
+f\relax(x) = \int_{-\infty}^\infty
+    f\hat\xi\,e^{2 \pi i \xi x}
+    \,d\xi
+```
+
+### 行内展示
+
+```markdown
+基于 KaTeX 在一行
+展示示例： `KaTeX:\int_0^\infty x^2 dx`
+```
+
+基于 KaTeX 在一行展示示例： `KaTeX:\int_0^\infty x^2 dx`
+
+Supported Functions
+---
+
+### Accents
+<!--rehype:wrap-class=col-span-2 row-span-2-->
+
+:- | :- | :-
+:- | :- | :-
+`KaTeX:a'` <pur>`a'`</pur> | `KaTeX:\tilde{a}` <pur>`\tilde{a}`</pur> | `KaTeX:\mathring{g}` <pur>`\mathring{g}`</pur>
+`KaTeX:a''` <pur>`a''`</pur> | `KaTeX:\widetilde{ac}` <pur>`\widetilde{ac}`</pur> | `KaTeX:\overgroup{AB}` <pur>`\overgroup{AB}`</pur>
+`KaTeX:a^{\prime}` <pur>`a^{\prime}`</pur> | `KaTeX:\utilde{AB}` <pur>`\utilde{AB}`</pur> | `KaTeX:\undergroup{AB}` <pur>`\undergroup{AB}`</pur>
+`KaTeX:\acute{a}` <pur>`\acute{a}`</pur> | `KaTeX:\vec{F}` <pur>`\vec{F}`</pur> | `KaTeX:\Overrightarrow{AB}` <pur>`\Overrightarrow{AB}`</pur>
+`KaTeX:\bar{y}` <pur>`\bar{y}`</pur> | `KaTeX:\overleftarrow{AB}` <pur>`\overleftarrow{AB}`</pur> | `KaTeX:\overrightarrow{AB}` <pur>`\overrightarrow{AB}`</pur>
+`KaTeX:\breve{a}` <pur>`\breve{a}`</pur> | `KaTeX:\underleftarrow{AB}` <pur>`\underleftarrow{AB}`</pur> | `KaTeX:\underrightarrow{AB}` <pur>`\underrightarrow{AB}`</pur>
+`KaTeX:\check{a}` <pur>`\check{a}`</pur> | `KaTeX:\overleftharpoon{ac}` <pur>`\overleftharpoon{ac}`</pur> | `KaTeX:\overrightharpoon{ac}` <pur>`\overrightharpoon{ac}`</pur>
+`KaTeX:\dot{a}` <pur>`\dot{a}`</pur> | `KaTeX:\overleftrightarrow{AB}` <pur>`\overleftrightarrow{AB}`</pur> | `KaTeX:\overbrace{AB}` <pur>`\overbrace{AB}`</pur>
+`KaTeX:\ddot{a}` <pur>`\ddot{a}`</pur> | `KaTeX:\underleftrightarrow{AB}` <pur>`\underleftrightarrow{AB}`</pur> | `KaTeX:\underbrace{AB}` <pur>`\underbrace{AB}`</pur>
+`KaTeX:\grave{a}` <pur>`\grave{a}`</pur> | `KaTeX:\overline{AB}` <pur>`\overline{AB}`</pur> | `KaTeX:\overlinesegment{AB}` <pur>`\overlinesegment{AB}`</pur>
+`KaTeX:\hat{\theta}` <pur>`\hat{\theta}`</pur> | `KaTeX:\underline{AB}` <pur>`\underline{AB}`</pur> | `KaTeX:\underlinesegment{AB}` <pur>`\underlinesegment{AB}`</pur>
+`KaTeX:\widehat{ac}` <pur>`\widehat{ac}`</pur> | `KaTeX:\widecheck{ac}` <pur>`\widecheck{ac}`</pur> | `KaTeX:\underbar{X}` <pur>`\underbar{X}`</pur>
+
+### \text｛…｝中的强调功能
+
+:- | :- | :-
+:- | :- | :-
+`KaTeX:\'{a}` <pur>`\'{a}`</pur> | `KaTeX:\~{a}` <pur>`\~{a}`</pur> |
+`KaTeX:\.{a}` <pur>`\.{a}`</pur> | `KaTeX:\H{a}` <pur>`\H{a}`</pur> |
+``KaTeX:\\\`{a}`` <pur><code>\\&#96;{a}</code></pur> | `KaTeX:\={a}` <pur>`\={a}`</pur> |
+`KaTeX:\"{a}` <pur>`\"{a}`</pur> | `KaTeX:\v{a}` <pur>`\v{a}`</pur> |
+`KaTeX:\^{a}` <pur>`\^{a}`</pur> | `KaTeX:\u{a}` <pur>`\u{a}`</pur> |
+`KaTeX:\r{a}` <pur>`\r{a}`</pur> |
+
+### Delimiter Sizing
+
+:-  |  :-
+:-  |  :-
+`KaTeX:\left(\LARGE{AB}\right)` | <pur>`\left(\LARGE{AB}\right)`</pur>
+`KaTeX:( \big( \Big( \bigg( \Bigg(`| <pur>`( \big( \Big( \bigg( \Bigg(`</pur>
+
+---
+
+:- | :- | :- | :- | :-
+:- | :- | :- | :- | :-
+`\left`   | `\big`  | `\bigl`  | `\bigm`  | `\bigr`
+`\middle` | `\Big`  | `\Bigl`  | `\Bigm`  | `\Bigr`
+`\right`  | `\bigg` | `\biggl` | `\biggm` | `\biggr`
+`` | `\Bigg` | `\Biggl` | `\Biggm` | `\Biggr`
+
+### 分隔符 Delimiters
+<!--rehype:wrap-class=col-span-3-->
+
+预览 | 方法 | 预览 | 方法 | 预览 | 方法 | 预览| 方法 | 预览 | 方法
+:- | :- | :- | :- | :- | :- | :- | :- | :- | :-
+| `KaTeX:()` | <pur>`()`</pur>                  | `KaTeX:\lparen \rparen` | <pur>`\lparen` `\rparen`</pur>           | `KaTex:⌈ ⌉` | <pur>`⌈ ⌉`</pur>       | `KaTex:\lceil \rceil` | <pur>`\lceil` `\rceil`</pur>              | `KaTex:\uparrow` | <pur>`\uparrow`</pur>             |
+| `KaTeX:[]` | <pur>`[]`</pur>                  | `KaTeX:\lbrack \rbrack` | <pur>`\lbrack` `\rbrack`</pur>           | `KaTex:⌊ ⌋` | <pur>`⌊ ⌋`</pur>       | `KaTex:\lfloor \rfloor` | <pur>`\lfloor` `\rfloor`</pur>          | `KaTex:\downarrow` | <pur>`\downarrow`</pur>         |
+| `KaTeX:\{ \}` | <pur>`{}`</pur>               | `KaTex:\lbrace \rbrace` | <pur>`\lbrace` `\rbrace`</pur>   | `KaTex:⎰⎱` | <pur>`⎰⎱`</pur>      | `KaTex:\lmoustache  \rmoustache` | <pur>`\lmoustache` `\rmoustache`</pur>  | `KaTex:\updownarrow` | <pur>`\updownarrow`</pur>     |
+| `KaTeX:⟨ ⟩` | <pur>`⟨⟩`</pur>                 | `KaTex:\langle \rangle` | <pur>`\langle` `\rangle`</pur>   | `KaTex:⟮ ⟯` | <pur>`⟮ ⟯`</pur>         | `KaTex:\lgroup \rgroup` | <pur>`\lgroup` `\rgroup`</pur>                   | `KaTex:\Uparrow` | <pur>`\Uparrow`</pur>             |
+| `KaTeX:∣`  | <pur>`\|`</pur>                  | `KaTex:\vert` | <pur>`\vert`</pur>                                 | `KaTex:┌ ┐` | <pur>`┌ ┐`</pur>       | `KaTex:\ulcorner \urcorner` | <pur>`\ulcorner` `\urcorner`</pur>   | `KaTex:\Downarrow` | <pur>`\Downarrow`</pur>         |
+| `KaTeX:\|` _(<red>MD语法冲突</red>)_ | <pur><code>\\&#124;</code></pur> | `KaTex:\Vert` | <pur>`\Vert`</pur>            | `KaTex:└ ┘` | <pur>`└ ┘`</pur>       | `KaTex:\llcorner \lrcorner` | <pur>`\llcorner` `\lrcorner`</pur>   | `KaTex:\Updownarrow` | <pur>`\Updownarrow`</pur>     |
+| `KaTeX:∣ ∣` | <pur>`\lvert` `\rvert`</pur>    | `KaTex:\lVert \rVert` | <pur>`\lVert` `\rVert`</pur>       |  | <pur>`\left.`</pur> |  | <pur>`\right.`</pur> | `KaTex:\backslash` | <pur>`\backslash`</pur> |
+| `KaTeX:\lang` `KaTeX:\rang` | <pur>`\lang` `\rang`<pur>   | `KaTeX:\lt \gt` | <pur>`\lt \gt`</pur>                 | `KaTex:⟦ ⟧` | <pur>`⟦ ⟧`</pur>  | `KaTex:\llbracket \rrbracket` | <pur>`\llbracket` `\rrbracket`</pur> | `KaTex:\lBrace \rBrace` | <pur>`\lBrace \rBrace`</pur> |
+<!--rehype:className=show-header left-align-->
+
+Environments
+---
+
+### Environments 1
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{matrix}
+   a & b \\
+   c & d
+\end{matrix}
+```
+
+```LaTeX
+\begin{matrix}
+   a & b \\
+   c & d
+\end{matrix}
+```
+
+### Environments 2
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{array}{cc}
+   a & b \\
+   c & d
+\end{array}
+```
+
+```LaTeX
+\begin{array}{cc}
+   a & b \\
+   c & d
+\end{array}
+```
+
+### Environments 3
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{pmatrix}
+   a & b \\
+   c & d
+\end{pmatrix}
+```
+
+```LaTeX
+\begin{pmatrix}
+   a & b \\
+   c & d
+\end{pmatrix}
+```
+
+### Environments 4
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{bmatrix}
+   a & b \\
+   c & d
+\end{bmatrix}
+```
+
+```LaTeX
+\begin{bmatrix}
+   a & b \\
+   c & d
+\end{bmatrix}
+```
+
+### Environments 5
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{vmatrix}
+   a & b \\
+   c & d
+\end{vmatrix}
+```
+
+```LaTeX
+\begin{vmatrix}
+   a & b \\
+   c & d
+\end{vmatrix}
+```
+
+### Environments 6
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{Vmatrix}
+   a & b \\
+   c & d
+\end{Vmatrix}
+```
+
+```LaTeX
+\begin{Vmatrix}
+   a & b \\
+   c & d
+\end{Vmatrix}
+```
+
+### Environments 7
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{Bmatrix}
+   a & b \\
+   c & d
+\end{Bmatrix}
+```
+
+```LaTeX
+\begin{Bmatrix}
+   a & b \\
+   c & d
+\end{Bmatrix}
+```
+
+### Environments 8
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\def\arraystretch{1.5}
+   \begin{array}{c:c:c}
+   a & b & c \\ \hline
+   d & e & f \\
+   \hdashline
+   g & h & i
+\end{array}
+```
+
+```LaTeX
+\def\arraystretch{1.5}
+   \begin{array}{c:c:c}
+   a & b & c \\ \hline
+   d & e & f \\
+   \hdashline
+   g & h & i
+\end{array}
+```
+
+### Environments 9
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+x = \begin{cases}
+   a &\text{if } b \\
+   c &\text{if } d
+\end{cases}
+```
+
+```LaTeX
+x = \begin{cases}
+   a &\text{if } b \\
+   c &\text{if } d
+\end{cases}
+```
+
+### Environments 10
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{rcases}
+   a &\text{if } b \\
+   c &\text{if } d
+\end{rcases}⇒…
+```
+
+```LaTeX
+\begin{rcases}
+   a &\text{if } b \\
+   c &\text{if } d
+\end{rcases}⇒…
+```
+
+### Environments 11
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{smallmatrix}
+   a & b \\
+   c & d
+\end{smallmatrix}
+```
+
+```LaTeX
+\begin{smallmatrix}
+   a & b \\
+   c & d
+\end{smallmatrix}
+```
+
+### Environments 12
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\sum_{
+\begin{subarray}{l}
+   i\in\Lambda\\
+   0<j<n
+\end{subarray}}
+```
+
+```LaTeX
+\sum_{
+\begin{subarray}{l}
+   i\in\Lambda\\
+   0<j<n
+\end{subarray}}
+```
+
+### Environments 12
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{equation}
+\begin{split}  a &=b+c\\
+      &=e+f
+\end{split}
+\end{equation}
+```
+<!--rehype:style=flex:1;-->
+
+```LaTeX
+\begin{equation}
+\begin{split}  a &=b+c\\
+      &=e+f
+\end{split}
+\end{equation}
+```
+
+### Environments 12
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{align}
+   a&=b+c \\
+   d+e&=f
+\end{align}
+```
+<!--rehype:style=flex:1;-->
+
+```LaTeX
+\begin{align}
+   a&=b+c \\
+   d+e&=f
+\end{align}
+```
+
+### Environments 12
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{gather}
+   a=b \\
+   e=b+c
+\end{gather}
+```
+<!--rehype:style=flex:1;-->
+
+```LaTeX
+\begin{gather}
+   a=b \\
+   e=b+c
+\end{gather}
+```
+
+### Environments 12
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{alignat}{2}
+   10&x+&3&y=2\\
+   3&x+&13&y=4
+\end{alignat}
+```
+<!--rehype:style=flex:1;-->
+
+```LaTeX
+\begin{alignat}{2}
+   10&x+&3&y=2\\
+   3&x+&13&y=4
+\end{alignat}
+```
+
+### Environments 12
+<!--rehype:body-style=display: flex;flex-direction: row;justify-content: flex-start;-->
+
+```KaTeX
+\begin{CD}
+   A @>a>> B \\
+@VbVV @AAcA \\
+   C @= D
+\end{CD}
+```
+<!--rehype:style=flex:1;-->
+
+```LaTeX
+\begin{CD}
+   A @>a>> B \\
+@VbVV @AAcA \\
+   C @= D
+\end{CD}
+```
+
+另见
+----
+
+- [LaTeX 官网](https://www.latex-project.org/) _(latex-project.org)_
+- [KaTeX 官网](https://katex.org/) _(katex.org)_
--- a/docs/php.md
+++ b/docs/php.md
@ -0,0 +1,972 @@
+PHP 备忘清单
+===
+
+这份 [PHP](https://www.php.net/manual/zh/index.php) 备忘单为快速查找最常用代码的正确语法提供了参考
+
+入门
+------
+
+### hello.php
+
+```php
+<?php // 以 PHP 开放标签开头
+echo "Hello World\n";
+print("Hello quickref.me");
+?>
+```
+
+PHP 运行命令
+
+```shell
+$ php hello.php
+```
+
+### 变量 Variables
+
+```php
+$boolean1 = true;
+$boolean2 = True;
+$int = 12;
+$float = 3.1415926;
+unset($float);  // 删除变量
+$str1 = "How are you?";
+$str2 = 'Fine, thanks';
+```
+
+查看: [Types](#php-类型)
+
+### 字符串 Strings
+
+```php
+$url = "quickref.me";
+echo "I'm learning PHP at $url";
+// 连接字符串
+echo "I'm learning PHP at " . $url;
+$hello = "Hello, ";
+$hello .= "World!";
+echo $hello;   # => Hello, World!
+```
+
+查看: [Strings](#php-字符串)
+
+### 数组 Arrays
+
+```php
+$num = [1, 3, 5, 7, 9];
+$num[5] = 11;
+unset($num[2]);    // 删除变量
+print_r($num);     # => 1 3 7 9 11
+echo count($num);  # => 5
+```
+
+查看: [Arrays](#php-数组)
+
+### 运算符 Operators
+
+```php
+$x = 1;
+$y = 2;
+$sum = $x + $y;
+echo $sum;   # => 3
+```
+
+查看: [Operators](#php-运算符)
+
+### Include
+<!--rehype:wrap-class=row-span-3-->
+
+#### vars.php
+
+```php
+<?php // 以 PHP 开放标签开头。
+$fruit = 'apple';
+echo "I was imported";
+return 'Anything you like.';
+?>
+```
+
+#### test.php
+
+```php
+<?php
+include 'vars.php';
+echo $fruit . "\n";   # => apple
+/* 与 include 相同，
+如果不能包含则导致错误*/
+require 'vars.php';
+// 也有效
+include('vars.php');
+require('vars.php');
+// 通过 HTTP 包含
+include 'http://x.com/file.php';
+// 包含和返回语句
+$result = include 'vars.php';
+echo $result;  # => Anything you like.
+?>
+```
+
+### 功能 Functions
+
+```php
+function add($num1, $num2 = 1) {
+    return $num1 + $num2;
+}
+echo add(10);    # => 11
+echo add(10, 5); # => 15
+```
+
+查看: [Functions](#php-函数)
+
+### 注释 Comments
+
+```php
+# 这是一个单行 shell 样式的注释
+// 这是一行 c++ 风格的注释
+/* 这是一个多行注释
+    另一行注释 */
+```
+
+### 常数 Constants
+
+```php
+const MY_CONST = "hello";
+echo MY_CONST;   # => hello
+
+# => MY_CONST is: hello
+echo 'MY_CONST is: ' . MY_CONST; 
+```
+
+### 类 Classes
+
+```php
+class Student {
+  public function __construct($name) {
+      $this->name = $name;
+  }
+}
+$alex = new Student("Alex");
+```
+
+查看: [Classes](#php-类)
+
+PHP 类型
+------
+
+### 布尔值 Boolean
+<!--rehype:wrap-class=row-span-2-->
+
+```php
+$boolean1 = true;
+$boolean2 = TRUE;
+$boolean3 = false;
+$boolean4 = FALSE;
+$boolean5 = (boolean) 1;   # => true
+$boolean6 = (boolean) 0;   # => false
+```
+
+布尔值不区分大小写
+
+### 整数 Integer
+<!--rehype:wrap-class=row-span-2-->
+
+```php
+$int1 = 28;    # => 28
+$int2 = -32;   # => -32
+$int3 = 012;   # => 10 (octal)
+$int4 = 0x0F;  # => 15 (hex)
+$int5 = 0b101; # => 5  (binary)
+# => 2000100000 (decimal, PHP 7.4.0)
+$int6 = 2_000_100_000;
+```
+
+另见: [Integers](https://www.php.net/manual/en/language.types.integer.php)
+
+### 字符串 Strings
+
+```php
+echo 'this is a simple string';
+```
+
+查看: [Strings](#php-字符串)
+
+### 数组 Arrays
+
+```php
+$arr = array("hello", "world", "!");
+```
+
+查看: [Arrays](#php-数组)
+
+### 浮点数 Float (Double)
+
+```php
+$float1 = 1.234;
+$float2 = 1.2e7;
+$float3 = 7E-10;
+$float4 = 1_234.567;  // as of PHP 7.4.0
+var_dump($float4);    // float(1234.567)
+$float5 = 1 + "10.5";   # => 11.5
+$float6 = 1 + "-1.3e3"; # => -1299
+```
+
+### Null
+
+```php
+$a = null;
+$b = 'Hello php!';
+echo $a ?? 'a is unset'; # => a is unset
+echo $b ?? 'b is unset'; # => Hello php
+$a = array();
+$a == null    # => true
+$a === null   # => false
+is_null($a)   # => false
+```
+
+### 可迭代对象 Iterables
+
+```php
+function bar(): iterable {
+  return [1, 2, 3];
+}
+function gen(): iterable {
+  yield 1;
+  yield 2;
+  yield 3;
+}
+foreach (bar() as $value) {
+  echo $value;   # => 123
+} 
+```
+
+PHP 字符串
+------
+
+### 字符串 String
+
+```php
+# => '$String'
+$sgl_quotes = '$String';
+# => 'This is a $String.'
+$dbl_quotes = "This is a $sgl_quotes.";
+# => a    tab character.
+$escaped   = "a \t tab character.";
+# => a slash and a t: \t
+$unescaped = 'a slash and a t: \t';
+```
+
+### 多行 Multi-line
+
+```php
+$str = "foo";
+// 未插值的多行
+$nowdoc = <<<'END'
+Multi line string
+$str
+END;
+// 将执行字符串插值
+$heredoc = <<<END
+Multi line
+$str
+END;
+```
+
+### 操作 Manipulation
+
+```php
+$s = "Hello Phper";
+echo strlen($s);       # => 11
+echo substr($s, 0, 3); # => Hel
+echo substr($s, 1);    # => ello Phper
+echo substr($s, -4, 3);# => hpe
+echo strtoupper($s);   # => HELLO PHPER
+echo strtolower($s);   # => hello phper
+echo strpos($s, "l");      # => 2
+var_dump(strpos($s, "L")); # => false
+```
+
+另见: [字符串函数](https://www.php.net/manual/en/ref.strings.php)
+
+PHP 数组
+------
+
+### 定义
+<!--rehype:wrap-class=row-span-2-->
+
+```php
+$a1 = ["hello", "world", "!"]
+$a2 = array("hello", "world", "!");
+$a3 = explode(",", "apple,pear,peach");
+```
+
+#### 混合 int 和 string 键
+
+```php
+$array = array(
+    "foo" => "bar",
+    "bar" => "foo",
+    100   => -100,
+    -100  => 100,
+);
+var_dump($array);
+```
+
+#### 短数组语法
+
+```php
+$array = [
+    "foo" => "bar",
+    "bar" => "foo",
+];
+```
+
+### 多阵列
+
+```php
+$multiArray = [ 
+    [1, 2, 3],
+    [4, 5, 6],
+    [7, 8, 9],
+];
+print_r($multiArray[0][0]) # => 1
+print_r($multiArray[0][1]) # => 2
+print_r($multiArray[0][2]) # => 3
+```
+
+### 多类型
+<!--rehype:wrap-class=row-span-2-->
+
+```php
+$array = array(
+    "foo" => "bar",
+    42    => 24,
+    "multi" => array(
+         "dim" => array(
+             "a" => "foo"
+         )
+    )
+);
+# => string(3) "bar"
+var_dump($array["foo"]);
+# => int(24)
+var_dump($array[42]);    
+# =>  string(3) "foo"
+var_dump($array["multi"]["dim"]["a"]);
+```
+
+### 操作
+
+```php
+$arr = array(5 => 1, 12 => 2);
+$arr[] = 56;      // 附加
+$arr["x"] = 42;   // 用键添加
+sort($arr);       // 排序
+unset($arr[5]);   // 消除
+unset($arr);      // 移除所有
+```
+
+查看: [数组函数](https://www.php.net/manual/en/ref.array.php)
+
+### 索引迭代
+
+```php
+$array = array('a', 'b', 'c');
+$count = count($array);
+for ($i = 0; $i < $count; $i++) {
+    echo "i:{$i}, v:{$array[$i]}\n";
+}
+```
+
+### 价值迭代
+
+```php
+$colors = array('red', 'blue', 'green');
+foreach ($colors as $color) {
+    echo "Do you like $color?\n";
+}
+```
+
+### 关键迭代
+
+```php
+$arr = ["foo" => "bar", "bar" => "foo"];
+foreach ( $arr as $key => $value )
+{
+    echo "key: " . $key . "\n";
+    echo "val: {$arr[$key]}\n";
+}
+```
+
+### 串联阵列
+
+```php
+$a = [1, 2];
+$b = [3, 4];
+// PHP 7.4 以后
+# => [1, 2, 3, 4]
+$result = [...$a, ...$b];
+```
+
+### Into 函数
+
+```php
+$array = [1, 2];
+function foo(int $a, int $b) {
+  echo $a; # => 1
+    echo $b; # => 2
+}
+foo(...$array);
+```
+
+### Splat运算符
+
+```php
+function foo($first, ...$other) {
+  var_dump($first); # => a
+    var_dump($other); # => ['b', 'c']
+}
+foo('a', 'b', 'c' /*, ...*/ );
+// 或
+function foo($first, string ...$other){}
+```
+
+PHP 运算符
+-------
+
+### 算术
+
+:- | -
+:- | -
+`+`  | 添加
+`-`  | 减法
+`*`  | 乘法
+`/`  | 分配
+`%`  | 取模
+`**` | 求幂
+
+### 分配
+
+:- | -
+:- | -
+`a += b` | 如同 `a = a + b`
+`a -= b` | 如同 `a = a – b`
+`a *= b` | 如同 `a = a * b`
+`a /= b` | 如同 `a = a / b`
+`a %= b` | 如同 `a = a % b`
+
+### 比较
+
+:- | -
+:- | -
+`==`  | 平等的
+`===` | 完全相同的
+`!=`  | 不相等
+`<>`  | 不相等
+`!==` | 不相同
+`<`   | 少于
+`>`   | 比...更棒
+`<=`  | 小于或等于
+`>=`  | 大于或等于
+`<=>` | 小于/等于/大于
+
+### 逻辑的
+
+:- | -
+:- | -
+`and` | 和
+`or`  | 或者
+`xor` | 独家或
+`!`   | 不是
+`&&`  | 和
+`\|\|`  | 或者
+
+### 算术
+
+```php
+// 算术
+$sum        = 1 + 1; // 2
+$difference = 2 - 1; // 1
+$product    = 2 * 2; // 4
+$quotient   = 2 / 1; // 2
+// 速记算术
+$num = 0;
+$num += 1;       // 将 $num 增加 1
+echo $num++;     // 打印 1（评估后的增量）
+echo ++$num;     // 打印 3（评估前的增量）
+$num /= $float;  // 将商除并分配给 $num
+```
+
+### 按位
+
+:- | -
+:- | -
+`&`  | 和
+`|`  | 或（包括或）
+`^`  | 异或（异或）
+`~`  | 不是
+`<<` | 左移
+`>>` | 右移
+
+PHP 条件
+------
+
+### If elseif else
+
+```php
+$a = 10;
+$b = 20;
+if ($a > $b) {
+    echo "a is bigger than b";
+} elseif ($a == $b) {
+    echo "a is equal to b";
+} else {
+    echo "a is smaller than b";
+}
+```
+
+### Switch
+
+```php
+$x = 0;
+switch ($x) {
+    case '0':
+        print "it's zero";
+        break; 
+    case 'two':
+    case 'three':
+        // do something
+        break;
+    default:
+        // do something
+}
+```
+
+### 三元运算符
+
+```php
+# => Does
+print (false ? 'Not' : 'Does');
+$x = false;
+# => Does
+print($x ?: 'Does');
+$a = null;
+$b = 'Does print';
+# => a is unsert
+echo $a ?? 'a is unset';
+# => print
+echo $b ?? 'b is unset';
+```
+
+### 匹配
+
+```php
+$statusCode = 500;
+$message = match($statusCode) {
+  200, 300 => null,
+  400 => '未找到',
+  500 => '服务器错误',
+  default => '已知状态码',
+};
+echo $message; # => 服务器错误
+```
+
+查看: [Match](https://www.php.net/manual/en/control-structures.match.php)
+
+### 匹配表达式
+
+```php
+$age = 23;
+$result = match (true) {
+    $age >= 65 => 'senior',
+    $age >= 25 => 'adult',
+    $age >= 18 => 'young adult',
+    default => 'kid',
+};
+echo $result; # => young adult
+```
+
+PHP 循环
+------
+
+### while 循环
+
+```php
+$i = 1;
+# => 12345
+while ($i <= 5) {
+    echo $i++;
+}
+```
+
+### do while 循环
+
+```php
+$i = 1;
+# => 12345
+do {
+    echo $i++;
+} while ($i <= 5);
+```
+
+### for i 循环
+
+```php
+# => 12345
+for ($i = 1; $i <= 5; $i++) {
+    echo $i;
+}
+```
+
+### break 跳出循环
+
+```php
+# => 123
+for ($i = 1; $i <= 5; $i++) {
+    if ($i === 4) {
+        break;
+    }
+    echo $i;
+}
+```
+
+### continue 继续
+
+```php
+# => 1235
+for ($i = 1; $i <= 5; $i++) {
+    if ($i === 4) {
+        continue;
+    }
+    echo $i;
+}
+```
+
+### foreach 循环
+
+```php
+$a = ['foo' => 1, 'bar' => 2];
+# => 12
+foreach ($a as $k) {
+    echo $k;
+}
+```
+
+查看: [Array iteration](#关键迭代)
+
+PHP 函数
+------
+
+### 返回值
+
+```php
+function square($x)
+{
+    return $x * $x;
+}
+echo square(4);  # => 16
+```
+
+### 返回类型
+
+```php
+// 基本返回类型声明
+function sum($a, $b): float {/*...*/}
+function get_item(): string {/*...*/}
+class C {}
+// 返回一个对象
+function getC(): C { return new C; }
+```
+
+### 可空返回类型
+
+```php
+// 在 PHP 7.1 中可用
+function nullOrString(int $v) : ?string
+{
+    return $v % 2 ? "odd" : null;
+}
+echo nullOrString(3);       # => odd
+var_dump(nullOrString(4));  # => NULL
+```
+
+查看: [Nullable types](https://www.php.net/manual/en/migration71.new-features.php)
+
+### 无效函数
+
+```php
+// 在 PHP 7.1 中可用
+function voidFunction(): void
+{
+  echo 'Hello';
+  return;
+}
+voidFunction();  # => Hello
+```
+
+### 变量函数
+
+```php
+function bar($arg = '')
+{
+    echo "In bar(); arg: '$arg'.\n";
+}
+$func = 'bar';
+$func('test'); # => In bar(); arg: test
+```
+
+### 匿名函数
+
+```php
+$greet = function($name)
+{
+    printf("Hello %s\r\n", $name);
+};
+$greet('World'); # => Hello World
+$greet('PHP');   # => Hello PHP
+```
+
+### 递归函数
+
+```php
+function recursion($x)
+{
+    if ($x < 5) {
+        echo "$x";
+        recursion($x + 1);
+    }
+}
+recursion(1);  # => 1234
+```
+
+### 默认参数
+
+```php
+function coffee($type = "cappuccino")
+{
+    return "Making a cup of $type.\n";
+}
+# => 制作一杯卡布奇诺
+echo coffee();
+# => 制作一杯
+echo coffee(null);
+# => 制作一杯浓缩咖啡
+echo coffee("espresso");
+```
+
+### 箭头函数
+
+```php
+$y = 1;
+ 
+$fn1 = fn($x) => $x + $y;
+// 相当于按值使用 $y：
+$fn2 = function ($x) use ($y) {
+    return $x + $y;
+};
+echo $fn1(5);   # => 6
+echo $fn2(5);   # => 6
+```
+
+PHP 类
+------
+
+### 构造函数 Constructor
+
+```php
+class Student {
+    public function __construct($name) {
+        $this->name = $name;
+    }
+    public function print() {
+        echo "Name: " . $this->name;
+    }
+}
+$alex = new Student("Alex");
+$alex->print();    # => Name: Alex
+```
+
+### 继承 Inheritance
+
+```php
+class ExtendClass extends SimpleClass
+{
+    // 重新定义父方法
+    function displayVar()
+    {
+        echo "Extending class\n";
+        parent::displayVar();
+    }
+}
+$extended = new ExtendClass();
+$extended->displayVar();
+```
+
+### 类变量 Classes variables
+<!--rehype:wrap-class=row-span-2-->
+
+```php
+class MyClass
+{
+    const MY_CONST         = 'value';
+    static $staticVar      = 'static';
+    // 可见度
+    public static $var1    = 'pubs';
+    // 仅限类
+    private static $var2   = 'pris';
+    // 类和子类
+    protected static $var3 = 'pros';
+    // 类和子类
+    protected $var6        = 'pro';
+    // 仅限类
+    private $var7          = 'pri';  
+}
+```
+
+静态访问
+
+```php
+echo MyClass::MY_CONST;   # => value
+echo MyClass::$staticVar; # => static
+```
+
+### 魔术方法
+
+```php
+class MyClass
+{
+    // 对象被视为字符串
+    public function __toString()
+    {
+        return $property;
+    }
+    // 与 __construct() 相反
+    public function __destruct()
+    {
+        print "Destroying";
+    }
+}
+```
+
+### 接口
+
+```php
+interface Foo 
+{
+    public function doSomething();
+}
+interface Bar
+{
+    public function doSomethingElse();
+}
+class Cls implements Foo, Bar 
+{
+    public function doSomething() {}
+    public function doSomethingElse() {}
+}
+```
+
+各种各样的
+------
+
+### 基本错误处理
+
+```php
+try {
+    // 做一点事
+} catch (Exception $e) {
+    // 处理异常
+} finally {
+    echo "Always print!";
+}
+```
+
+### PHP 8.0 中的异常
+
+<!--rehype:wrap-class=col-span-2-->
+```php {.wrap}
+$nullableValue = null;
+try {
+  $value = $nullableValue ?? throw new InvalidArgumentException();
+} catch (InvalidArgumentException) { // 变量是可选的
+    // 处理我的异常
+    echo "print me!";
+}
+```
+
+### 自定义异常
+
+<!--rehype:wrap-class=row-span-2-->
+```php
+class MyException extends Exception {
+    // 做一点事
+}
+```
+
+用法
+
+```php
+try {
+    $condition = true;
+    if ($condition) {
+        throw new MyException('bala');
+    }
+} catch (MyException $e) {
+    // 处理我的异常
+}
+```
+
+### Nullsafe 运算符
+<!--rehype:wrap-class=row-span-2-->
+
+```php
+// 从 PHP 8.0.0 开始，这一行：
+$result = $repo?->getUser(5)?->name;
+// 相当于下面的代码：
+if (is_null($repo)) {
+    $result = null;
+} else {
+    $user = $repository->getUser(5);
+    if (is_null($user)) {
+        $result = null;
+    } else {
+        $result = $user->name;
+    }
+}
+```
+
+另见: [Nullsafe 运算符](https://wiki.php.net/rfc/nullsafe_operator)
+
+### 常用表达
+
+```php
+$str = "Visit Quickref.me";
+echo preg_match("/qu/i", $str); # => 1
+```
+
+查看: [PHP中的正则表达式](./regex.md#php中的正则表达式)
+
+### fopen() 模式
+
+:- | -
+:- | -
+`r`  | 读
+`r+` | 读写，前置
+`w`  | 写入，截断
+`w+` | 读写，截断
+`a`  | 写，追加
+`a+` | 读写，追加
+
+### 运行时定义的常量
+
+```php
+define("CURRENT_DATE", date('Y-m-d'));
+// 一种可能的表示
+echo CURRENT_DATE;   # => 2021-01-05
+# => CURRENT_DATE is: 2021-01-05
+echo 'CURRENT_DATE is: ' . CURRENT_DATE; 
+```
+
+另见
+----
+
+- [PHP 官方中文文档](https://www.php.net/manual/zh/index.php) _(php.net)_
+- [Learn X in Y minutes](https://learnxinyminutes.com/docs/php/) _(learnxinyminutes.com)_
--- a/docs/postgres.md
+++ b/docs/postgres.md
@ -623,7 +623,7 @@ $ sudo systemctl restart postgresql

 另见：[复制](https://www.postgresql.org/docs/current/sql-copy.html)

-Also see
--------
+另见
+----

 - [Posgres-cheatsheet](https://gist.github.com/apolloclark/ea5466d5929e63043dcf#posgres-cheatsheet) _(gist.github.com)_
--- a/docs/python.md
+++ b/docs/python.md
@ -1232,3 +1232,10 @@ else:                    # try/except 块的可选子句。 必须遵循除块
 finally:                 # 在所有情况下执行
    print("我们可以在这里清理资源")
 ```
+
+另见
+----
+
+- [Python](https://www.python.org/)  _(python.org)_
+- [Learn X in Y minutes](https://learnxinyminutes.com/docs/python/) _(learnxinyminutes.com)_
+- [Regex in python](./regex.md#python-中的正则表达式) _(quickref.me)_
--- a/docs/quickreference.md
+++ b/docs/quickreference.md
@ -8,7 +8,7 @@ Quick Reference 备忘清单

 ### 本地编译预览

-简单的将仓库克隆下来本地调试页面展示。
+将仓库克隆到本地调试页面。请参阅[贡献指南](https://github.com/jaywcjlove/reference/blob/main/CONTRIBUTING.md)了解如何开始

 #### 克隆仓库

@ -22,12 +22,101 @@ git clone git@github.com:jaywcjlove/reference.git
 ```shell
 npm i         # 安装依赖
 npm run build # 编译输出 HTML
-npm run start # 监听 md 文件编译输出 HTML
 ```

 HTML 存放在仓库根目录下的 `dist` 目录中，将 `dist/index.html` 静态页面在浏览器中打开预览。

+```shell
+npm run start # 监听 md 文件编译输出 HTML
+```
+
+### 目录结构
+
+```bash
+.
+├── CONTRIBUTING.md   # 贡献说明
+├── Dockerfile
+├── LICENSE
+├── README.md   # Home(首页) 内容
+├── dist        # 编译后的静态资源目录
+├── docs        # Markdown 文档（速查表）
+│   ├── bash.md
+│   ├── ....
+│   └── yaml.md
+├── package.json
+└── scripts     # MD 转 HTML 的编译脚本
+    ├── assets  # LOGO 图标文件资源
+    ├── ....
+    └── watch.mjs
+```
+
+### 添加一个备忘清单
+
+一个简单的备忘清单包含 `页面大标题<h1>`，放在大标题下面的 `介绍` 文本，`<h2>` 分类标题，`<h3>` 内容为 `卡片`
+
+```markdown
+备忘清单 (页面大标题)
+===
+
+这是您可以在当前清单上使用的样式参考！备忘清单介绍
+
+入门 (分类标题)
+---
+
+### 介绍 (卡片)
+
+卡片内容
+```
+
+上面 markdown 内容存放到 `docs` 目录中，命名为 `xxx.md`
+
+### 首页导航
+<!--rehype:wrap-class=col-span-2-->
+
+首页(`README.md`)存放在仓库的根目录，通过这个 `README.md` 自动生成首页导航，下面是导航实例：
+
+```markdown
+## Linux 命令
+
+[Cron](./docs/cron.md)<!--rehype:style=background: rgb(239 68 68/var(\-\-bg\-opacity));-->
+<!--rehype:class=home-card-->
+```
+
+首页导航图标存放在 `scripts/assets` 目录中，如果你的备忘清单定义为 `docs/cron.md`，那么你的图标就定义为 `cron.svg` 存放到 `scripts/assets` 目录中，重新编译首页当行菜单就拥有了图标。
+
+- 图标存放在 [`scripts/assets`](https://github.com/jaywcjlove/reference/blob/main/scripts/assets) 目录中
+- 图片名称与清单名称保持一致 `cron.md` -> `cron.svg` (注意大小写)
+- SVG 图标尺寸 `<svg height="1em" width="1em"`
+- SVG 图标颜色使用继承颜色值 `<svg fill="currentColor"`
+- 使用 `<!--rehype:class=home-card-->` 标识卡片样式
+
+### 首页提示配置
+
+```markdown
+[Django](./docs/djiango.md)<!--rehype:style=background: rgb(12 75 51/var(\-\-bg\-opacity));&class=contributing-->
+```
+<!--rehype:className=wrap-text-->
+
+添加 `contributing` 类名，会在卡片下方默认添加 `👆待完善需要您的参与`
+
+```markdown
+class=tag&data-info=👆看看还缺点儿什么？
+```
+
+上面示例将默认提示更改为： `👆看看还缺点儿什么？`
+
+```markdown
+[Django](./docs/djiango.md)<!--rehype:style=background: rgb(12 75 51/var(\-\-bg\-opacity));&class=tag&data-lang=Python-->
+```
+<!--rehype:className=wrap-text-->
+
+添加 `class=tag&data-lang=Python` 类名和参数，会在卡片右上角标记 _`Python`_
+
+Markdown 语法注释
+---
+
 ### 介绍
+<!--rehype:wrap-class=row-span-2-->

 在备忘清单采用 `HTML 注释语法`，标识网站布局和一些样式，目的是为了在 `GitHub` 中也是正常毫无瑕疵的预览 [`Markdown`](./markdown.md)。

@ -38,12 +127,12 @@ HTML 存放在仓库根目录下的 `dist` 目录中，将 `dist/index.html` 静
 卡片 Markdown 内容展示，下面注释语法为文字内容改变样式
 <!--rehype:style=color: red;-->
 ```
-<!--rehype:className=wrap-text -->
+<!--rehype:className=wrap-text-->

-使用 `col-span-2` 类标识，卡片占 `2` 列位置
+上面基础示例，使用 `col-span-2` 类标识，卡片占 `2` 列位置，参考现有备忘清单的源代码是一个好习惯！

 ### 注释语法介绍
-<!--rehype:wrap-class=row-span-3&style=color:black;background-color: #d7a100;-->
+<!--rehype:wrap-class=row-span-4&style=color:black;background-color: #d7a100;-->

 - 在某个 [`Markdown`](./markdown.md) 语法下方或者后面，添加 HTML注释
 - 以 `<!--rehype:` 开始，`-->` 结束，包裹参数内容
@ -57,7 +146,7 @@ HTML 存放在仓库根目录下的 `dist` 目录中，将 `dist/index.html` 静
 #### 示例

 ```markdown
-### H2 部分
+## H2 部分
 <!--rehype:body-class=cols-2-->

 ### H3 部分
@ -70,7 +159,7 @@ HTML 存放在仓库根目录下的 `dist` 目录中，将 `dist/index.html` 静
 ### 标题
 <!--rehype:wrap-class=row-span-3&style=color:red;-->
 ```
-<!--rehype:className=wrap-text -->
+<!--rehype:className=wrap-text-->

 #### 参数说明

@ -96,7 +185,7 @@ _我是红色_<!--rehype:style=color: red;-->
 **加粗变大红色**
 <!--rehype:style=color: red;font-size: 18px-->
 ```
-<!--rehype:className=wrap-text -->
+<!--rehype:className=wrap-text-->

 上面添加注释样式，文字 _加粗变大红色_<!--rehype:style=color: red;font-size: 18px--> 变`红`并且`大`了

@ -106,7 +195,7 @@ _我是红色_<!--rehype:style=color: red;-->
 \```js
 function () {}
 \```
-<!--rehype:className=wrap-text -->
+<!--rehype:className=wrap-text-->
 ```

 如果代码块内容太长，使用强制换行类(`wrap-text`)解决
@ -149,11 +238,11 @@ export const Student = (
 添加注释配置 `<!--rehype:tooltips-->` 添加一个 Tooltips 提示。

 ### H3 部分(卡片)背景颜色
-<!--rehype:wrap-style=background: #00c69357;-->
+<!--rehype:wrap-style=background: #8dffd42e;-->

 ```markdown
 ### H3 部分(卡片)背景颜色
-<!--rehype:wrap-style=background: #00c69357;-->
+<!--rehype:wrap-style=background: #8dffd42e;-->
 ```
 <!--rehype:className=wrap-text -->

@ -214,35 +303,6 @@ const school = <div>学校</div>;
 `<del>` 或 `~~删除~~` | <del>~~红色~~</del>
 <!--rehype:className=shortcuts-->

-### 注释类配置
-<!--rehype:wrap-class=col-span-2 row-span-2-->
-
-类 | 说明
---- | ----
-`<!--rehype:className=wrap-text-->` | 强制换行
-`<!--rehype:className=show-header-->` | 展示表格表头
-`<!--rehype:className=shortcuts-->` | 快捷键样式
-`<!--rehype:className=auto-wrap-->` | 隐藏表头强制小尺寸自动换行
-`<!--rehype:className=style-list-arrow-->` | 列表箭头样式展示表格
-`<!--rehype:className=style-list-->` | 列表样式展示表格
-`<!--rehype:className=left-align-->` | 表格末尾列左对齐
-`<!--rehype:className=style-none-->` | \<li> 没有标记
-`<!--rehype:className=style-timeline-->` | 时间轴样式
-`<!--rehype:className=style-arrow-->` | 箭头标记
-
-### 隐藏卡片标题
-<!--rehype:style=display:none;&wrap-style=padding-top: 0;-->
-
-```
-隐藏卡片标题，在 H3 标题下面添加注释样式
-```
-
-```markdown {2}
-### 隐藏卡片标题
-<!--rehype:style=display:none;&wrap-style=padding-top: 0;-->
-```
-<!--rehype:className=wrap-text -->
-
 ### HTML 代码预览

 ```
@ -259,6 +319,35 @@ const school = <div>学校</div>;

 上面的 [`markdown`](./markdown.md) 代码在 `meta` 位置添加 `preview` 标识，[HTML](./html.md) 代码将被执行预览

+### 隐藏卡片标题
+<!--rehype:style=display:none;&wrap-style=padding-top: 0;-->
+
+```
+隐藏卡片标题，在 H3 标题下面添加注释样式
+```
+
+```markdown {2}
+### 隐藏卡片标题
+<!--rehype:style=display:none;&wrap-style=padding-top: 0;-->
+```
+<!--rehype:className=wrap-text -->
+
+### 注释类配置
+<!--rehype:wrap-class=col-span-2-->
+
+类 | 说明
+---- | ----
+`<!--rehype:className=wrap-text-->` | 强制换行
+`<!--rehype:className=show-header-->` | 展示表格表头
+`<!--rehype:className=shortcuts-->` | 快捷键样式
+`<!--rehype:className=auto-wrap-->` | 隐藏表头强制小尺寸自动换行
+`<!--rehype:className=style-list-arrow-->` | 列表箭头样式展示表格
+`<!--rehype:className=style-list-->` | 列表样式展示表格
+`<!--rehype:className=left-align-->` | 表格末尾列左对齐
+`<!--rehype:className=style-none-->` | \<li> 没有标记
+`<!--rehype:className=style-timeline-->` | 时间轴样式
+`<!--rehype:className=style-arrow-->` | 箭头标记
+
 ### KaTeX 数学渲染

 ```KaTeX
--- a/docs/regex.md
+++ b/docs/regex.md
@ -452,7 +452,7 @@ M(?(?=.*?\bher\b)s|r)\.

 表达式 | 匹配示例
 :- | -
-`.ar` | The `car` `par`ked in the `gar`age.
+`.ar` | The `car` <pur>`par`</pur>ked in the `gar`age.
 `ar[.]` | A garage is a good place to park a c`ar`.
 <!--rehype:className=show-header-->

@ -474,7 +474,7 @@ M(?(?=.*?\bher\b)s|r)\.

 表达式 | 匹配示例
 :- | -
-`[a-z]*` | T`he` `car` `parked` `in` `the` `garage` #21.
+`[a-z]*` | T`he` <pur>`car`</pur> `parked` <pur>`in`</pur> `the` <pur>`garage`</pur> #21.
 `\s*cat\s*` | The fat `cat` sat on the con`cat`enation.

 表达式 `[a-z]*` 匹配一个行中所有以小写字母开头的字符串。
@ -503,7 +503,7 @@ M(?(?=.*?\bher\b)s|r)\.
 `[0-9]{2,3}` | The number was 9.`999`7 but we rounded it off to `10`.0.
 `[0-9]{2,}` | The number was 9.`9997` but we rounded it off to `10`.0.
 `[0-9]{3}` | The number was 9.`999`7 but we rounded it off to 10.0.
-<!--rehype:className=show-header-->
+<!--rehype:className=style-list-arrow-->

 ### `(...)` 特征标群

@ -616,7 +616,7 @@ M(?(?=.*?\bher\b)s|r)\.
 表达式 | 匹配示例
 :- | -
 `The` | The `fat` cat sat on the mat.
-`/The/gi` | The `fat` `cat` `sat` on the `mat`.
+`/The/gi` | `The` fat cat sat on `the` mat.
 <!--rehype:className=show-header-->

 修饰语 `i` 用于忽略大小写，`g` 表示全局搜索。
@ -722,7 +722,7 @@ False
 函数 | 说明
 :-|-
 `re.findall`  | 返回包含所有匹配项的列表
-`re.finditer` | 返回一个可迭代的匹配对象（每个匹配一个）
+`re.finditer` | 返回一个可迭代的匹配对象<br/> _(每个匹配一个)_
 `re.search`   | 如果字符串中的任何位置存在匹配项，则返回 Match 对象
 `re.split`    | 返回一个列表，其中字符串在每次匹配时被拆分
 `re.sub`      | 用字符串替换一个或多个匹配项
--- a/docs/rust.md
+++ b/docs/rust.md
@ -19,6 +19,7 @@ fn main() {
 ```shell
 $ rustc Hello_World.rs
 $ ./Hello_World
+
 Hello, World!
 ```

@ -142,25 +143,55 @@ foo!(3);

 ### 结构体

+结构体是一个使用关键字 `struct` 定义的标称型(nominal)结构体类型
+
 ```rust
 struct Point { x: i32, y: i32 }
 let p = Point { x: 10, y: 11 };
 let px: i32 = p.x;
 ```

-结构体是一个使用关键字 `struct` 定义的标称型(nominal)结构体类型
-
-### 枚举
+#### 元祖结构体

 ```rust
-enum Foo {
-  Bar,       // 0
-  Baz = 123, // 123
-  Quux,      // 124
-}
+struct Color (i32, i32, i32);
+let black = Color(0,0,0);
+```

-let baz_discriminant = Foo::Baz as u32;
-assert_eq!(baz_discriminant, 123);
+#### 单元结构体
+
+不关心该类型的内容, 只关心它的行为。
+
+```rust
+struct Solution;
+impl Solution{
+    // ...
+}
+```
+
+### 语句与表达式
+
+在 rust 中，语句无需返回值，而表达式总要返回值
+
+#### 语句
+
+```rust
+let a = "hello".to_string();
+let b = a + " world";
+println!("{}", b);
+```
+
+#### 表达式
+
+```rust
+fn main(){
+    let x = {
+        let a = "hello".to_string();
+        a + " world"
+    };
+    println!("{}", x);
+    // hello world
+}
 ```

 Rust 类型
@ -220,6 +251,9 @@ println!("社区的名称是 {community_name}，它有 {no_of_members} 个成员
 查看: [字符串](#rust-字符串)

 ### 数组
+<!--rehype:wrap-class=row-span-2-->
+
+这里介绍的是固定长度的数组。rust 中常用的是集合类型 vec 表示的[动态数组](#rust-动态数组)

 ```rust
 ┌─────┬─────┬─────┬─────┬─────┬─────┐
@ -234,28 +268,8 @@ println!("社区的名称是 {community_name}，它有 {no_of_members} 个成员
 let array: [i64; 6] = [92,97,98,99,98,94];
 ```

-### 多维数组
-<!--rehype:wrap-class=row-span-2-->
-
-```rust
-     j0   j1   j2   j3   j4   j5
-   ┌────┬────┬────┬────┬────┬────┐
-i0 | 1  | 2  | 3  | 4  | 5  | 6  |
-   ├────┼────┼────┼────┼────┼────┤
-i1 | 6  | 5  | 4  | 3  | 2  | 1  |
-   └────┴────┴────┴────┴────┴────┘
-```
-
 ----

-```rust
-let array: [[i64; 6] ;2] = [
-            [1,2,3,4,5,6],
-            [6,5,4,3,2,1]];
-```
-
-### 可变数组
-
 ```rust
 let mut array: [i32 ; 3] = [2,6,10];
 array[1] = 4;
@ -273,14 +287,6 @@ let mut slices: &[i64] = &array[0..3]
 println!("切片的元素是：{slices:?}");
 ```

-### 向量
-
-```rust
-let some_vector = vec![1,2,3,4,5]; 
-```
-
-使用 `vec!` 宏声明向量
-
 ### 元组

 ```rust
@ -411,8 +417,28 @@ println!("{:?}", element2);
   }
   ```

+### 多维数组
+
+```rust
+     j0   j1   j2   j3   j4   j5
+   ┌────┬────┬────┬────┬────┬────┐
+i0 | 1  | 2  | 3  | 4  | 5  | 6  |
+   ├────┼────┼────┼────┼────┼────┤
+i1 | 6  | 5  | 4  | 3  | 2  | 1  |
+   └────┴────┴────┴────┴────┴────┘
+```
+
+----
+
+```rust
+let arr = vec![
+    vec![1, 2, 3, 4, 5, 6],
+    vec![6, 5, 4, 3, 2, 1]
+];
+```
+
 ### 常用方法
-<!--rehype:wrap-class=col-span-3-->
+<!--rehype:wrap-class=col-span-2-->

 -|:-
 -|:-
@ -429,6 +455,86 @@ println!("{:?}", element2);
 `drain(range)`            | 删除 `vec` 中指定范围的元素,同时返回一个迭代该范围所有元素的迭代器
 `split_off(index)`        | 切分 `vec`，索引左边的元素保留在原 `vec` 中(含索引)，索引右边的元素(不含索引)在返回的 `vec` 中

+枚举
+--------
+
+### 在结构体中使用枚举
+
+```rust
+enum IpAddrKind {
+  V4,
+  V6,
+}
+struct IpAddr {
+  kind: IpAddrKind,
+  address: String,
+}
+
+fn main(){
+    let ip = IpAddr{
+        kind: IpAddrKind::V4,
+        address: String::from("127.0.0.1")
+    };
+}
+```
+
+### 枚举的变体
+
+```rust
+enum IpAddrKind {
+  V4(u8, u8, u8, u8),
+  V6(String),
+}
+
+fn main() {
+  let home = IpAddrKind::V4(127, 0, 0, 1);
+  let loopback = IpAddrKind::V6(String::from("::1"));
+}
+```
+
+----
+
+```rust
+enum Message{
+  Quit,
+  Move {x:i32, y:i32},
+  Write(String),
+  ChangeColor(i32, i32, i32),
+}
+fn main(){
+  let q = Message::Quit;
+  let m = Message::Move {x:10, y:20};
+  let w = Message:: Write(String::from("hello"));
+  let c = Message::ChangeColor(10, 20, 30);
+}
+```
+
+### 模式匹配结构体
+
+```rust
+#[derive(Debug)]
+enum Grade {
+    A,
+    B,
+    C,
+}
+enum Subject {
+    Math(Grade),
+    English(Grade),
+}
+
+fn subject_grade(sub: Subject) {
+  match sub {
+    Subject::Math(grade) => println!("The Math is {:?}", grade),
+    Subject::English(grade) => println!("The Math is {:?}", grade),
+  }
+}
+
+fn main() {
+    subject_grade(Subject::Math(Grade::A));
+}
+```
+
 Rust 运算符
 -----------

@ -535,29 +641,7 @@ let mut l = k;
 Rust 流程控制
 ------------

-### If表达式
-
-```rust
-let case1: i32 = 81;
-let case2: i32 = 82;
-if case1 < case2 {
-  println!("case1 大于 case2");
-}
-```
-
-### If...Else 表达式
-
-```rust
-let case3 = 8;
-let case4 = 9;
-if case3 >= case4 {
-  println!("case3 优于 case4");
-} else {
-  println!("case4 大于 case3");
-}
-```
-
-### If...Else...if...Else 表达式
+### If 表达式

 ```rust
 let foo = 12;
@ -573,101 +657,30 @@ if foo == bar {
 }
 ```

-### If...let 表达式
-<!--rehype:wrap-class=row-span-3-->
-
-```rust
-let mut arr1:[i64 ; 3] = [1,2,3];
-if let[1,2,_] = arr1{
-    println!("与数组一起使用");
-}
-let mut arr2:[&str; 2] = ["one", "two"];
-if let["Apple", _] = arr2{
-    println!("也适用于 str 数组");
-}
-```
-
----
-
-```rust
-let tuple_1 = ("India", 7, 90, 90.432);
-if let(_, 7, 9, 78.99) = tuple_1{
-    println!("也适用于元组");
-}
-let tuple_2 = ( 9, 7, 89, 12, "Okay");
-if let(9, 7,89, 12, blank) = tuple_2 {
-    println!("一切{blank}伴侣？");
-}
-let tuple_3 = (89, 90, "Yes");
-if let(9, 89, "Yes") = tuple_3{
-    println!("模式确实匹配");
-}
-else {
-    println!("模式不匹配");
-}
-```
-
-### 匹配表达式
-<!--rehype:wrap-class=row-span-3-->
-
-```rust
-let day_of_week = 2;
-match day_of_week {
-  1 => {
-    println!("兄弟们今天是星期一");
-  },
-  2 => {
-    println!("兄弟们今天是星期二");
-  },
-  3 => {
-    println!("兄弟们今天是星期三");
-  },
-  4 => {
-    println!("兄弟们今天是星期四");
-  },
-  5 => {
-    println!("兄弟们今天是星期五");
-  },
-  6 => {
-    println!("兄弟们今天是星期六");
-  },
-  7 => {
-    println!("兄弟们今天是星期天");
-  },
-  _ => {
-    println!("默认!")
-  }
-};
-```
-
-### 嵌套...If 表达式
-
-```rust
-let nested_conditions = 89;
-if nested_conditions == 89 {
-    let just_a_value = 98;
-    if just_a_value >= 97 {
-        println!("大于 97");
-    }
-}
-```
-
 ### For 循环
+<!--rehype:wrap-class=col-span-2-->

 ```rust
-for mut i in 0..15 {
-  i-=1;
-  println!("i 的值为：{i}");
+let mut vec = [1, 2, 3];
+for v in &mut vec {
+  *v -= 1;
+  println!("v 的值为：{v}");
 }
 ```

+使用方法                      | 等价使用方式                         | 所有权
+:-|:-:|:-
+for item in collection      | for item in collection.into_iter() | 转移所有权
+for item in &collection     | for item in collection.iter()      | 不可变借用
+for item in &mut collection | for item in collection.iter_mut()  | 可变借用
+
 ### While 循环

 ```rust
 let mut check =  0;
 while check < 11{
  println!("check 是：{check}");
-  check+=1;
+  check += 1;
  println!("递增后：{check}");
  if check == 10{
    break; // 停止 while
@ -675,7 +688,7 @@ while check < 11{
 }
 ```

-### Loop 关键字
+### Loop 循环

 ```rust
 loop {
@ -685,19 +698,6 @@ loop {

 无限循环表示

-### Break 中断语句
-
-```rust
-let mut i = 1;
-loop {
-  println!("i 是 {i}");
-  if i > 100 {
-    break;
-  }
-  i *= 2;
-}
-```
-
 ### Continue 继续声明

 ```rust
@ -711,118 +711,279 @@ for (v, c) in (0..10+1).enumerate(){
 }
 ```

+### Break 中断语句
+
+`break` 可以单独使用，也可以带一个返回值
+
+```rust
+let mut i = 1;
+let res = loop {
+  println!("i 是 {i}");
+  if i > 100 {
+    break i - 100;
+  }
+  i *= 2;
+}
+
+println!("{res}"); // 28
+```
+
+Rust 模式匹配
+--------
+
+### match
+<!--rehype:wrap-class=row-span-2-->
+
+match 模式匹配，使用 `a | b` 表示匹配 a **或** b，使用 `_`，表示匹配剩余所有选项
+
+```rust
+fn main(){
+    let grade = Grade::A;
+    match grade {
+        Grade::A => println!("Good"),
+        Grade::B => println!("Not bad"),
+        Grade::C | Grade::D => println!("Come on"),
+        _ => println!("emmm"),
+    }
+}
+
+enum Grade {
+    A,
+    B,
+    C,
+    D,
+    E,
+    F,
+}
+```
+
+#### `matches!` 宏
+
+它可以将一个表达式跟模式进行匹配，然后返回匹配的结果 `true` 或 `false`
+
+```rust
+assert!(matches!('x' ',A'..='Z' | 'a'..='z'));
+assert!(matches!(Some(101), Some(x) if x > 100));
+```
+
+### if let 匹配
+
+match 表达式需要匹配所有的枚举才能结束，但通常我们只需要匹配我们需要的值
+
+```rust
+let x = 3;
+match Some(x) {
+    Some(3) => println!("I guess that x is 3"),
+    _ => ()
+}
+```
+
+使用 `if let`
+
+```rust
+let x = 3;
+if let Some(3) = Some(x) {
+    println!("I guess that x is 3");
+}
+```
+
+### while let
+
+```rust
+let mut stack = vec![];
+
+stack.push(1);
+stack.push(2);
+stack.push(3);
+
+while let Some(top) = stack.pop() {
+    println!("{}", top);
+}
+```
+
+### 其它模式匹配
+
+#### for 循环迭代器
+
+```rust
+for (i, v) in collection.iter().enumerate(){}
+```
+
+#### let
+
+```rust
+let (x, _, y) = (1, 2, 3);
+println!("{x},{y}");
+```
+
+### 函数中的模式匹配
+
+```rust
+fn add((x, y): (i32, i32)) -> i32 {
+    x + y
+}
+fn main(){
+  let sum = add(1, 2);
+  println!("{sum}");
+}
+```
+
+### 忽略参数
+<!--rehype:wrap-class=row-span-2-->
+
+#### 使用 `..` 忽略剩余参数
+
+```rust
+struct Point {
+    x: i32,
+    y: i32,
+    z: i32,
+}
+
+let origin = Point { x: 0, y: 0, z: 0 };
+
+match origin {
+    Point { x, .. } => println!("x is {}", x),
+}
+```
+
+#### 使用 `_` 忽略部分参数
+
+```rust
+let hello = ('h', 'e', 'l', 'l', 'o');
+
+match hello {
+    (h, _, _, l, o) => {
+        println!("char: {}, {}, {}", h, l, o)
+    },
+}
+```
+
+### 匹配命名变量
+
+以下代码，只要给定的 x 是 Some 类型，但 Some 中的值不是 1，都会匹配到 y
+
+```rust
+let x = Some(10);
+match x {
+    Some(1) => println!("x = 1"),
+    Some(y) => println!("y = {:?}", y),
+    _ => println!("None"),
+}// y = 10
+```
+
+### `@` 绑定
+<!--rehype:wrap-class=row-span-2-->
+
+`@` 运算符允许为一个字段绑定另外一个变量。
+
+```rust
+let grade = 'A';
+match grade {
+    good @ 'A'..='C' => println!("your grade is {}", good),
+    _ => println!("Come on"),
+}
+```
+
+----
+
+```rust
+#[derive(Debug)]
+struct Point {
+    x: i32,
+    y: i32,
+}
+fn main(){
+    let p @ Point {x: px, y: py } = Point {x: 10, y: 23};
+    println!("x: {}, y: {}", px, py);
+    println!("{:?}", p);
+}
+```
+
+----
+
+如果使用 `|`，需要使用 `()`，进行多个模式的绑定
+
+```rust
+match 1 {
+    num @ (1 | 2) => {
+        println!("{}", num);
+    }
+    _ => {}
+}
+```
+
+### 使用匹配守卫
+
+```rust
+let x = Some(2);
+match x {
+    Some(1) => println!("x = 1"),
+    Some(y) if y == 2 => println!("y = {:?}", y),
+    _ => println!("No match"),
+}// y = 2
+```
+
 Rust 函数
 --------

-### 基本函数
+### 函数命名
+
+rust 的函数使用蛇形命名法（snake case）

 ```rust
 fn print_message(){
  println!("Hello, Quick Reference!");
 }
-fn main(){
-  // 在 Rust 中调用函数
-  print_message();
-}
 ```

-### 按值传递
+### 参数值
+
+rust 需要为函数的参数标明确定的类型

 ```rust
-fn main()
-{
-  let x:u32 = 10;
-  let y:u32 = 20;
-  
-  // => 200
-  println!("计算: {}", cal_rect(x, y));
+fn another_fn(a:u8, b: &str){
+    println!("我是 u8:{}", a);
+    println!("我是 &str:{}", b);
 }
-fn cal_rect(x:u32, y:u32) -> u32
-{
-  x * y
+
+fn main(){
+    another_fn(10, "hello")
 }
 ```

-### 通过引用传递
+### 返回值
+
+如果不指定返回值，rust 默认返回 `()` 类型

 ```rust
-fn main(){
-  let mut by_ref = 3;      // => 3
-  power_of_three(&mut by_ref);
-  println!("{by_ref}");  // => 9
-}
-fn power_of_three(by_ref: &mut i32){
-  // 取消引用很重要
-  *by_ref = *by_ref * *by_ref;
-  println!("{by_ref}");  // => 9
-}
+// 在 bin 中的入口函数默认返回 ()
+fn main(){}
 ```

-### 返回
+----
+
+使用 `->` 指定返回值，如果**表达式**在最后一行，无需使用 return

 ```rust
-fn main(){
-  let (mut radius, mut pi) = (3.0, 3.14);
-  let(area, _perimeter) = calculate (
-      &mut radius,
-      &mut pi
-  );
-  println!("圆的面积和周长为：{area} & {_perimeter}");
-}
-fn calculate(radius : &mut f64, pi: &mut f64) -> (f64, f64){
-  let perimeter = 2.0 * *pi * *radius;
-  let area = *pi * *radius * *radius;
-  return (area, perimeter);
+fn add(a:i32, b:i32) -> i32 {
+    if a + b < 100 {
+        return a - b;
+    }
+    a + b
 }
 ```
+
+### 永不返回 `!`
+
+```rust
+fn dead_end() -> ! {
+    panic!("panic!!!!!");
+}
+```
+
 <!--rehype:className=wrap-text -->

-### 数组作为参数
-
-```rust
-fn main(){
-  let mut array: [i32 ; 5] = [1,2,3,4,6];
-  print_arrays(array);
-  println!("元素：{array:?}");
-}
-fn print_arrays(mut array:[i32; 5]) {
-  array[0] = 89;
-  array[1] = 90;
-  array[2] = 91;
-  array[3] = 92;
-  array[4] = 93;
-  println!("元素：{array:?}");
-}
-```
-
-### 返回数组
-
-```rust
-fn main(){
-  let mut arr:[i32; 5] = [2,4,6,8,10];
-  multiply(arr);
-  println!("数组是：{:?}", multiply(arr));
-}
-fn multiply (mut arr: [i32 ; 5]) -> [i32 ; 5]{
-  arr[2] = 90;
-  for mut i in 0..5 {
-      arr[i] = arr[i] * arr[2];
-  }
-  return arr;
-}
-```
-<!--rehype:className=wrap-text -->
-
-### 泛型函数
-
-```rust
-use std::fmt::Debug;
-fn foo<T>(x: &[T]) where T: Debug {
-    // 省略细节
-}
-foo(&[1, 2]);
-```
-
 杂项
 -----

--- a/docs/typescript.md
+++ b/docs/typescript.md
@ -10,8 +10,8 @@ TypeScript 备忘清单

 TypeScript 是具有类型语法的 JavaScript。Interface 是为了匹配它们的运行时行为而构建的。

- [JavaScript 备忘清单](./javascript.md)
- [TypeScript 官网](https://www.typescriptlang.org/)
+- [JavaScript 备忘清单](./javascript.md) _(jaywcjlove.github.io)_
+- [TypeScript 官网](https://www.typescriptlang.org/)  _(typescriptlang.org)_

 ### 内置类型基元

@ -1264,3 +1264,52 @@ class Select<T> extends React.Component<SelectProps<T>, any> {}
 // 使用
 const Form = () => <Select<string> items={['a', 'b']} />;
 ```
+
+各种各样的技巧
+---
+
+### keyof 取 interface 的键
+<!--rehype:wrap-class=row-span-2-->
+
+```ts
+interface Point {
+    x: number;
+    y: number;
+}
+ 
+// type keys = "x" | "y"
+type keys = keyof Point;
+```
+
+### 索引签名
+
+```ts
+interface NumberOrString {
+  [index: string]: string | number;
+  length: number;
+  name: string;
+}
+```
+
+### 从数组中提取类型
+
+```ts
+type Point = { x: number; y: number; }
+type Data = Point[];
+// Data 是个数组，提取里面的元素类型
+type PointDetail = Data[number];
+// type PointDetail = { x: number; y: number; }
+```
+
+### 只读元组类型
+
+```ts
+const point = [3, 4] as const
+// type 'readonly [3, 4]'
+```
+
+另见
+----
+
+- [JavaScript 备忘清单](./javascript.md)
+- [TypeScript 官网](https://www.typescriptlang.org/) _(typescriptlang.org)_
--- a/docs/vim.md
+++ b/docs/vim.md
@ -408,7 +408,7 @@ Vim 搜索和替换
 `?foo`   | 向后搜索
 `/\v\d+` | 使用 [regex](./regex.md) 搜索
 `n`      | 下一个匹配的搜索模式
-`N`      | 上一场比赛
+`N`      | 上一个匹配的搜索
 `*`      | 向前搜索当前单词
 `#`      | 向后搜索当前单词

--- a/package.json
+++ b/package.json
@ -1,6 +1,6 @@
 {
  "name": "@wcj/reference",
-  "version": "1.19.0",
+  "version": "1.20.0",
  "description": "为开发人员分享快速参考备忘单(主要是方便自己)。",
  "author": "jaywcjlove",
  "license": "MIT",
--- a/scripts/assets/dart.svg
+++ b/scripts/assets/dart.svg
@ -0,0 +1,3 @@
+<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg" fill="currentColor" height="1em" width="1em">
+  <path d="M4.105 4.105S9.158 1.58 11.684.316a3.079 3.079 0 0 1 1.481-.315c.766.047 1.677.788 1.677.788L24 9.948v9.789h-4.263V24H9.789l-9-9C.303 14.5 0 13.795 0 13.105c0-.319.18-.818.316-1.105l3.789-7.895zm.679.679v11.787c.002.543.021 1.024.498 1.508L10.204 23h8.533v-4.263L4.784 4.784zm12.055-.678c-.899-.896-1.809-1.78-2.74-2.643-.302-.267-.567-.468-1.07-.462-.37.014-.87.195-.87.195L6.341 4.105l10.498.001z"/>
+</svg>
--- a/scripts/assets/latex.svg
+++ b/scripts/assets/latex.svg
--- a/scripts/assets/php.svg
+++ b/scripts/assets/php.svg
@ -0,0 +1,3 @@
+<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg" fill="currentColor" height="1em" width="1em">
+  <path d="M7.01 10.207h-.944l-.515 2.648h.838c.556 0 .97-.105 1.242-.314.272-.21.455-.559.55-1.049.092-.47.05-.802-.124-.995-.175-.193-.523-.29-1.047-.29zM12 5.688C5.373 5.688 0 8.514 0 12s5.373 6.313 12 6.313S24 15.486 24 12c0-3.486-5.373-6.312-12-6.312zm-3.26 7.451c-.261.25-.575.438-.917.551-.336.108-.765.164-1.285.164H5.357l-.327 1.681H3.652l1.23-6.326h2.65c.797 0 1.378.209 1.744.628.366.418.476 1.002.33 1.752a2.836 2.836 0 0 1-.305.847c-.143.255-.33.49-.561.703zm4.024.715.543-2.799c.063-.318.039-.536-.068-.651-.107-.116-.336-.174-.687-.174H11.46l-.704 3.625H9.388l1.23-6.327h1.367l-.327 1.682h1.218c.767 0 1.295.134 1.586.401s.378.7.263 1.299l-.572 2.944h-1.389zm7.597-2.265a2.782 2.782 0 0 1-.305.847c-.143.255-.33.49-.561.703a2.44 2.44 0 0 1-.917.551c-.336.108-.765.164-1.286.164h-1.18l-.327 1.682h-1.378l1.23-6.326h2.649c.797 0 1.378.209 1.744.628.366.417.477 1.001.331 1.751zm-2.595-1.382h-.943l-.516 2.648h.838c.557 0 .971-.105 1.242-.314.272-.21.455-.559.551-1.049.092-.47.049-.802-.125-.995s-.524-.29-1.047-.29z"/>
+</svg>
--- a/scripts/style/style.css
+++ b/scripts/style/style.css
@ -162,14 +162,17 @@ menu {
  padding: 0;
 }

-yel {
-  color: var(--color-prettylights-syntax-variable);
+yel,
+yel code {
+  color: var(--color-prettylights-syntax-variable) !important;
 }
-red {
-  color: var(--color-danger-fg);
+red,
+red code {
+  color: var(--color-danger-fg) !important;
 }
-pur {
-  color: var(--color-prettylights-syntax-entity);
+pur,
+pur code {
+  color: var(--color-prettylights-syntax-entity) !important;
 }

 :is(.h3wrap-body, .wrap-body) p > code,
--- a/scripts/utils/getTocsTree.mjs
+++ b/scripts/utils/getTocsTree.mjs
@ -107,7 +107,7 @@ export function getTocsTree(arr = [], result = []) {
              {
                type: 'element',
                tagName: 'div',
-                properties: { class: 'wrap-body' },
+                properties: { class: ['wrap-body'] },
                children: [...header],
              },
            ],
@ -133,7 +133,12 @@ export function getTocsTree(arr = [], result = []) {
              children: [...resultChilds],
            });
          } else {
+            panle.children[0].children[1].properties?.class.push(bodyClass);
            panle.children[0].children[1].children = panle.children[0].children[1].children.concat(resultChilds);
+            if (panle.children[0].children[1].properties && bodyStyle) {
+              const initStyle = panle.children[0].children[1].properties?.style || '';
+              panle.children[0].children[1].properties.style = initStyle + bodyStyle;
+            }
          }
        }
      }
Author	SHA1	Message	Date
jaywcjlove	63739bff97	chore: update workflows config.	2022-11-13 23:26:22 +08:00
jaywcjlove	a4650ba20b	released v1.20.0	2022-11-13 23:25:29 +08:00
jaywcjlove	304fca65aa	feat: add `latex.md` #47	2022-11-13 23:20:45 +08:00
jaywcjlove	7dab4bc821	feat: add `dart.md` #58	2022-11-13 16:19:51 +08:00
fw_qaq	a3a03dc5cf	doc: add strcut and enum in the rust (#53 ) * content: add strcut and enum in the rust * update * update	2022-11-13 14:20:13 +08:00
github-actions[bot]	c4027826df	doc: modify README.md.	2022-11-13 06:19:40 +00:00
github-actions[bot]	ec5de21ad8	doc: modify CONTRIBUTING.md.	2022-11-13 06:19:39 +00:00
jaywcjlove	2d29bce40d	feat: add `php.md` #57	2022-11-13 14:18:33 +08:00
jaywcjlove	45916503c1	doc: update `ffmpeg.md` #56	2022-11-13 03:53:34 +08:00
jaywcjlove	7dab833cb5	doc: update `quickreference.md`.	2022-11-13 03:46:04 +08:00
github-actions[bot]	2787e80dd2	doc: modify README.md.	2022-11-12 18:48:34 +00:00
github-actions[bot]	51377308ab	doc: modify CONTRIBUTING.md.	2022-11-12 18:48:34 +00:00
jaywcjlove	5660ad20dd	chore: update contributors.	2022-11-13 02:47:29 +08:00
fw_qaq	0917f70be8	doc: add fliter in the ffmpeg (#56 )	2022-11-13 00:09:24 +08:00
fw_qaq	dcbdaea754	typo: fix typo content in the vim (#52 )	2022-11-12 18:01:57 +08:00
jaywcjlove	144f263ad0	doc: update `typescript.md`.	2022-11-12 14:28:27 +08:00
jaywcjlove	ef5a27f5a1	doc: update `typescript.md`.	2022-11-12 14:26:09 +08:00
DemigodLiu	82457e896e	fix: 修正选择器的真正含义 update css.md (#51 )	2022-11-12 12:38:48 +08:00
jaywcjlove	d796def71c	website: update style.	2022-11-12 09:18:22 +08:00
jaywcjlove	8cb9a8eaa4	doc: update regex.md	2022-11-12 09:17:56 +08:00
jaywcjlove	739697937d	doc: fix error in regex.md	2022-11-12 01:22:29 +08:00
jaywcjlove	4ce6660ca8	doc: update rust.md #50 #49	2022-11-12 00:53:33 +08:00
fw_qaq	5677612d9d	doc: add some content in the rust.md (#50 )	2022-11-12 00:40:56 +08:00