JavaScript 实例 按照一个可指定的深度递归遍历数组: letnestedArray=[ 1,2,[3,4,[5,6]]];letflatArray=nestedArray.flat();console.log(flatArray);//输出: [1, 2, 3, 4, [5, 6]]//指定深度为2letdeeplyNestedArray=[1,2,[ 3,4,[5,6]]];letdeeply
In this article we show how to flatten arrays using theflatmethod in JavaScript. Array flattening Array flattening is the process of reducing the dimensionality of a nested array. Theflatmethod creates a new array with all sub-array elements concatenated into it recursively up to the specified de...
1 第一步,通过快捷方式打开HBuilder工具,新建静态页面flat.html,如下图所示:2 第二步,在下方插入一个标签,声明一个数组a,并打印结果,如下图所示:3 第三步,保存代码并在浏览器中预览,打开浏览器控制台,查看打印结果,如下图所示:4 第四步,接着返回HBuilder,在数组a后面调用flat()方法,打印调用...
The Array forEach() Method Syntax array.flat(depth) Parameters ParameterDescription depthOptional. How deep a nested array should be flattened. Default is 1. Return Value TypeDescription An arrayThe flattened array. Array Tutorials: Array Tutorial ...
In this article we show how to map and flatten arrays using the flatMap method in JavaScript. Array flatMap operationThe flatMap method is a combination of map and flat operations. It first maps each element using a mapping function, then flattens the result into a new array. This is ...
It was always complicated to flatten an array in JS. Not anymore! ES2019 introduced a new method that flattens arrays with Array.flat()...
在JavaScript中,处理多维数组时,我们经常需要将其扁平化为一维数组。Array.prototype.flat方法正是为此目的而设计的。它允许我们以一种简洁的方式将嵌套数组“拉平”到单一层级。 工作原理 Array.prototype.flat方法返回一个新数组,该数组是通过将当前数组中的子数组(嵌套数组)递归地“拉平”到指定深度而生成的。如果不...
Notes: Theflat()method: does not change the original array. removes empty slots in arrays. Example 1: Using flat() Method // 3 nested arrayletnumbers = [1,2, [3,4, [5,6, [7,8]]]; // reducing nesting by flattening the array to depth 2letflattenArray = numbers.flat(2); /...
var array2 = array1.flat(0); // array2: [1,2, [3,4],[[5, 6]],[[[7, 8]]],[[[9, 10]]] 使用深度参数值0调用flat()函数。这意味着原始数组中包含的任何数组都不会被展平,并且新数组的单个数组项和嵌套数组的组成与原始数组完全相同。 负深度...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 constmappedArray=array.flatMap((item,index,origArray)=>{// ...return[value1,value2,...,valueN];}[,thisArg]); 回调函数在原数组中的每个iteam上被调用,有3个参数:当前项、索引和原数组。然后,回调函数返回的数组被扁平化了1层,得到的项目被添加...