将数组拆分为给定大小的块 [英] Splitting an array up into chunks of a given size

问题描述

我编写了一个带有两个参数的函数:(1)数组，(2)块的大小.

I have written a function which takes two parameters: (1) an Array, (2) size of the chunk.

function chunkArrayInGroups(arr, size) {

  var myArray = [];

  for(var i = 0; i < arr.length; i += size) {
    myArray.push(arr.slice(i,size));
  }

  return myArray;
}

我想将此数组拆分为给定大小的块.

I want to split this array up into chunks of the given size.

chunkArrayInGroups(["a", "b", "c", "d"], 2)  

应返回: [["a"，"b"]，["c"，"d"]] .

我回来了: [["a"，"b"]，[]]

推荐答案

您误解了 切片 参数表示.第二个是索引，直到要获得子数组为止(不包括在内).这不是长度.

You misunderstood what the slice parameters mean. The second one is the index until which (not included) you want to get the subarray. It's not a length.

array.slice(from, to); // not array.slice(from, length)

function chunkArrayInGroups(arr, size) {
  var myArray = [];
  for(var i = 0; i < arr.length; i += size) {
    myArray.push(arr.slice(i, i+size));
  }
  return myArray;
}
console.log(chunkArrayInGroups(["a", "b", "c", "d"], 2));

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