从生命周期上看The const keyword is used to define compile time constants,I.e, the value of the const variable is known at compile time. Whereas ‘val’ is used ...

applyuse ES6123456789101112131415161718192021222324Function.prototype.myCall = function(obj, ...args) { if (obj === null || obj === undefined) & ...

Future forms Future simple:I will go to beijing tomorrow.(decide now) Present continuous for future:I am meeting Tom at the station at six.(decide i ...

javascript原型链的介绍我们经常会这么写 12345678function Person () { this.name = 'John';}var person = new Person();Person.prototype.say = function()
...

golang中 Print Sprint Fprint的对比1234567891011121314151617181920212223242526272829303132package mainimport ( "fmt" "os")type po ...

箭头函数的写法123var fun = () => { return 1;} 等于 123function fun() { return 1;} 普通函数中的this this总是代表它的直接调用者, 例如 obj.function ,那么func ...

准备调试代码index.ts123456let sum: number = 0;for (let i = 1; i <= 100; i++) { sum += i;}console.log('Sum is %s', sum); 编写相应的 tsconfig.jsonts ...

brew install 禁止update homebrew1export HOMEBREW_NO_AUTO_UPDATE=true

module.exports和exportsmodule变量代表当前模块。这个变量是一个对象，module对象会创建一个叫exports的属性，这个属性的默认值是一个空的对象： module.exports用法exports的方法和属性都可以被module.exports代替 1console.lo ...

需求定时清理指定目录下三天前的日志 delLogs.sh12345678910111213141516#!/bin/shto_clear_dir=(1 2 3 4 5)function cleanlog () { for item in ${to_clear_dir[@]& ...