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a-cheatsheets's Issues

理解 koa 中间件核心 

#!/usr/bin/env node

// 中间件 a
function* a(next) {
  yield 1;

  // 执行下一个中间件
  yield* next;

  yield '继续执行A中间件';
}

// 中间件 b
function* b(next) {
  yield 2;
  yield 3;
}


var next = function* (){};
var i = [a, b].length;

// 通过next首尾相连
while(i--) {
  next = [a, b][i].call(null, next);
}

// 包裹第一个middleware
function* start(ne) {
  yield* ne;
}


// 输出
console.log(start(next).next());
console.log(start(next).next());
console.log(start(next).next());
console.log(start(next).next());

结果:

➜  a-lab ./a
{ value: 1, done: false }
{ value: 2, done: false }
{ value: 3, done: false }
{ value: '继续执行A中间件', done: false }

macaca sendkeys

用sendkeys方法后，打印了一下html，没有显示输入的值，sendkeys后没有刷新源码，取不到输入的值

How to Commit

  • feat：新功能（feature）
  • fix：修补bug
  • docs：文档（documentation）
  • style： 格式（不影响代码运行的变动）
  • refactor：重构（即不是新增功能，也不是修改bug的代码变动）
  • test：增加测试
  • chore：构建过程或辅助工具的变动

flexbox @mixin 

@mixin flexbox() {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
}

@mixin flex($values) {
  -webkit-box-flex: $values;
  -moz-box-flex:  $values;
  -webkit-flex:  $values;
  -ms-flex:  $values;
  flex:  $values;
}

@mixin order($val) {
  -webkit-box-ordinal-group: $val;  
  -moz-box-ordinal-group: $val;     
  -ms-flex-order: $val;     
  -webkit-order: $val;  
  order: $val;
}

@mixin flexAlignItems($val) {
  -webkit-box-align: $val;
  -moz-align-items: $val;
  -webkit-align-items: $val;
  box-align: $val;
  align-items: $val;
}

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