Lambda表达式

知识点1: 箭头函数

无参

function myConsole1 () {
  console.log(666)
}

let myConsole2 = function () {
  console.log(777)
}

// 箭头函数
let myConsole3 = () => {
  console.log(888)
}

// 箭头函数,函数体只有一行时可以省略{}
let myConsole4 = () => console.log(999)

export {myConsole1, myConsole2, myConsole3, myConsole4}

单参

let myConsole1 = function (value) {
  console.log(value)
}

// 箭头函数
let myConsole2 = (value) => {
  console.log(value)
}

export {myConsole1, myConsole2}

多参

let myCount1 = function (num1, num2) {
  let count = num1 + num2
  console.log(count)
}

// 箭头函数
let myCount2 = (num1, num2) => {
  let count = num1 + num2
  console.log(count)
}

export {myCount1, myCount2}

返回对象

hello.js

function obj1 () {
  return ({name: 'Jack1', age: 31})
}

let obj2 = function () {
  return ({name: 'Jack2', age: 32})
}

// 箭头函数
let obj3 = xxx => {
  return ({name: 'Jack3', age: 33})
}

export {obj1, obj2, obj3}

hello.vue

import {obj1, obj2, obj3} from '../../util/es6Test/hello'
export default {
  mounted () {
    console.log(obj1().name, obj1().age)
    console.log(obj2().name, obj2().age)
    console.log(obj3().name, obj3().age)
  }
}
posted @ 2019-04-14 23:49 bobi1234 阅读(...) 评论(...) 编辑 收藏