如何从数组中获取子数组? [英] How to get subarray from array?

问题描述

我有 var ar = [1, 2, 3, 4, 5] 并且想要一些函数 getSubarray(array, fromIndex, toIndex)，调用的结果getSubarray(ar, 1, 3) 是新的数组 [2, 3, 4].

I have var ar = [1, 2, 3, 4, 5] and want some function getSubarray(array, fromIndex, toIndex), that result of call getSubarray(ar, 1, 3) is new array [2, 3, 4].

推荐答案

看一看 Array.slice(begin, end)

const ar  = [1, 2, 3, 4, 5];

// slice from 1..3 - add 1 as the end index is not included

const ar2 = ar.slice(1, 3 + 1);

console.log(ar2);

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