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
It was always complicated to flatten an array in JS. Not anymore! ES2019 introduced a new method that flattens arrays with Array.flat()...
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...
方法/步骤 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...
Array.flat()函数是JavaScript中用于将嵌套数组扁平化为一维数组的方法。本文将详细探讨该函数的用法、原理、性能以及在实际应用中的使用场景。
js flat array All In One flat array 使用js 编写一个程序将数组扁平化并去除其中重复部分数据,最终得到一个升序且不重复的数组; 已知如下数组: constarr = [ [1,2,2], [3,4,5,5], [6,7,8,9, [11,12, [12,13, [14] ] ] ],10]; ...
vararray1=[1, ,3, ,5];vararray2=array1.flat();//array2:[1,3,5] 尽管原始数组占用了五个位置,而第二个和第四个位置的值未定义,但是flat()函数从函数完成后返回的新数组中删除了这两个数组项。结果,新数组只包含三个数组项,它们的值不为undefined。
// array with empty slotsletarray_with_holes = [1, ,3]; // removes holes in the arrayletflattedArray = array_with_holes.flat(); console.log(flattedArray);// [ 1, 3 ] Run Code Output [ 1, 3 ] Also Read: JavaScript Array flatMap()...
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 ...
JavaScript built-in: Array: flat Global usage 94.31% + 0% = 94.31% IE ❌ 6 - 10: Not supported ❌ 11: Not supported Edge ❌ 12 - 18: Not supported ✅ 79 - 136: Supported ✅ 137: Supported Firefox ❌ 2 - 61: Not supported ✅ 62 - 138: Supported ✅ 139: Supported...