array-flatten用于对数组进行降维. 使用# Copy Highlighter-hljs const{ flatten } =require("array-flatten");// 降维数组 console.log(flatten([1, [2,666, [3, [4, [5],6],7],8],9])); 附录源码# Copy Highlighter-hljs // 指定深度展开 functionflattenWithDepth(array, result, depth) { for...
Array.isArray(val)?acc.concat(flattenDeep(val)):acc.concat(val), [], ); } flattenDeep(arr1); // [1, 2, 3, 1, 2, 3, 4, 2, 3, 4] lodash lodash.flatten lodash.flattendeep lodash.flattendepth https://www.npmjs.com/package/lodash.flatten https://www.npmjs.com/package/loda...
baseFlatten(array, 1) : []//如果数组长度为0返回空数组,否则调用baseFlatten展开数组一层} exportdefaultflatten 下面是baseFlatten import isFlattenable from './isFlattenable.js'/** * The base implementation of `flatten` with support for restricting flattening. * * @private * @param {Array} arra...
使用 array.flatmap()最简单的方法是将包含项目的数组扁平化 const arrays = [[2, 4], [6]];const flatten = arrays.flatMap(item => item);console.log(flatten); // logs [2, 4, 6]1.2.3.事例地址：https://jsfiddle.net/dmitri_pavlutin/5rwvcz17/ 但是array.flatMap()除了简单的扁平化之外...
Flatten nested arrays. 🚨 Notice: Code using node.js >= 11 should use the native Array.flat() method instead. 🚨 Installation npm install array-flatten --save Usage import { flatten } from "array-flatten"; flatten([1, [2, [3, [4, [5], 6], 7], 8], 9]); //=> [1, ...
flatten(problem);// [1,2,3,4,5,6,7,8,9] 案例08 针对 promise 或 async 函数的使用备注 如果使用 promise 或 async 函数作为 forEach() 等类似方法的 callback 参数,最好对造成的执行顺序影响多加考虑,否则容易出现错误。
The Array.flat() method is used to flatten an array. With the help of this method, we can un-nest (flatten) the nested array within a single line.
console.log(flatten); // logs [2, 4, 6] 1. 2. 3. 事例地址:https://jsfiddle.net/dmitri_pavlutin/5rwvcz17/ 但是array.flatMap()除了简单的扁平化之外,还可以做更多的事情。通过控制从回调中返回的数组项的数量: 通过返回一个空数组从结果数组中删除该项 ...
function flattenDeep(arr) { return arr.reduce( (acc, val) => Array.isArray(val) ? acc.concat(flattenDeep(val)) : acc.concat(val), [], ); } flattenDeep(arr1); // [1, 2, 3, 1, 2, 3, 4, 2, 3, 4] 1. 2. 3.
Array.flat(n)是ES10扁平数组的api,n表示维度,n值为Infinity时维度为无限大 2.开始篇 functionflatten(arr){while(arr.some(item=>Array.isArray(item))){arr=[].concat(...arr);}returnarr;}flatten([1,[2,3]])//[1,2,3]flatten([1,[2,3,[4,5]])//[1,2,3,4,5] ...