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数组如何递归降维News
Senior Care News

数组如何递归降维

Array.prototype.myReduce = function () { let newArr = ; for (let item of this) { if (Array.isArray(item)) { newArr = newArr.concat(item.myRe...

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ES6语法处理数组多维展开News
Senior Care News

ES6语法处理数组多维展开

flat可以展开数组，里面可以接收一个参数，例如flat(3),就是展开3维数组。或者传入Infinity展开所有 let ar = ]]] let st = ar.flat(Infinity) console.log(st)

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ES6构造函数新增方法News
Senior Care News

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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React配置二级路由News
Senior Care News

React配置二级路由

在layout中配置二级路由只需要在Route下面嵌套Route即可，在需要显示的地方写 例如： 配置二级App.js <Route path='/Layout' element={<Layout />}> {/* 热映 */} <Route pa...

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数组扁平化处理News
Senior Care News

数组扁平化处理

有一个多维数组 const arr = ]], 6]; 要求转换成： 可以使用一下方法解决： 方法一： const arr = ]], 6]; const flattenedArr = arr.flat(Infinity); console.log(flattenedArr);...

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数组快速去重的方法News
Senior Care News

数组快速去重的方法

一.使用 Set 数据结构：Set 是 ES6 中的一种数据结构，它只能存储唯一的值，可以通过将数组转换为 Set 来去除重复项，然后再将 Set 转换回数组。 const arr = ; const uniqueArr = ; 二.使用 Array.prototype.fil...

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