学习类Class简记

类 ： class symbols objects decorators

1. class 一种原型链的语法糖

class Fruit {
    constructor(name, calories) {
        this.name = name
        this.calories = calories
        this.pieces = 1
    }
    chop () {
        this.pieces++
    }
    bite (person) {
        if (this.piecess < 1) return
        const calories = this.calories/this.pieces
        person.satiety += calories
        this.calories -= calories
        this.pieces--
    }
}

util.inherits(Banana,Fruit)

2.symbols 协议/命名冲突

const first = Symbol()
object.getOwnPropertySymbol()
Symbol.for(key) //获取symbols
Symbol.keyFor(symbol) // 来提取符号的key
Symbol.match() // 正则
Symbol.iterator

3.objects

Object.assign({}, options)
Object.is

Object.create()

4. js规范 保存函数功能的单一性 避免重复的代码

async/await > promise
Eslint - plugin - prettier

[1, 2, 3, 4]
.map(item => item*2)
.filter(item => item > 2)
.forEach(item => console.log(item))

赏

1分也是爱

微信