It was always complicated to flatten an array in JS. Not anymore! ES2019 introduced a new method that flattens arrays with Array.flat()...
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flatMap flatMap > flat + map https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flatMap varnew_array=arr.flatMap(functioncallback(currentValue[,index[,array]]){ // return element for new_array }[,thisArg]) flat https://developer.mozilla.org/en-US/docs...
Theflat()method concatenates sub-array elements. See Also: The Array map() Method The Array flatMap() Method The Array filter() Method The Array forEach() Method Syntax array.flat(depth) Parameters ParameterDescription depthOptional. How deep a nested array should be flattened. ...
These methods are fairly new and only works in the latest versions of modern browsers, and Node.js 11 and higher.The Array.flat() method creates a new array with all sub-array elements concatenated into it recursively up to the specified depth:...
Array.flatAll demos lodash lodash.flatten lodash.flattendeep lodash.flattendepth https://www.npmjs.com/package/lodash.flatten https://www.npmjs.com/package/lodash.flattendeep https://www.npmjs.com/package/lodash.flattendepth https://lodash.com/docs/4.17.15#flatten ...
const nestedArray = [['👍', '🐍'], ['👎', '🐘'], ['👏', '➡']]; const flatArray = [].concat(...nestedArray); console.log(flatArray) // [ '👍', '🐍', '👎', '🐘', '👏', '➡' ] Hey, if you've found this useful, please share the post to hel...
console.log(arr.flat()) // [0, 1, 2, 3, [4, 5], 6] console.log(arr.flat(Infinity)) 数组去重 一、利用ES6中的 Set 方法去重 注:Set为ES6新增的一个对象,允许存储任何类型(原始值或引用值)的唯一值 console.log(...new Set(arr)); // [1,0,2,9,8,3] ...
js array flat all in one array flat flatMap flatMap > flat + map var new_array = arr.flatMap(function callback(currentValue[, index[, array]]) { // return element for new_array }[, thisArg]) 1. 2. 3. flat var newArray = arr.flat([depth]); ...
掌握JS 原生 056: 数组实例方法 Array.prototype.flat() 数组的扁平化处理,将多维数组转换为一维数组。 106 0 00:44 App 掌握JS原生 071: 数组实例方法 Array.prototype.splice() 就地删除或替换或添加数组的元素。 95 0 00:34 App 掌握JS 原生 063: 数组实例方法 Array.prototype.map() 由原数组中的每...