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ES6构造函数新增方法
1.Arry.from(),将两类对象转为真正的数组,可以接收第二个参数用来处理元素。 <script> let a = { 0: '1', 1: '2', 2: '3', length: 3, } let s = Array.from(a, v => { re...
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1.Arry.from(),将两类对象转为真正的数组,可以接收第二个参数用来处理元素。 <script> let a = { 0: '1', 1: '2', 2: '3', length: 3, } let s = Array.from(a, v => { re...
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