使用underscore.js以块形式分割JavaScript数组 [英] Split javascript array in chunks using underscore.js

问题描述

我需要将一个javascript数组拆分为 n 大小的块。

p>

  [a1，a2，a3，a4，a5，a6，a7 ，a8，a9，a10，a11，a12，a13，bb，b，b，c，c， b 
和一个 n 等于4，输出应该是这样的： 
 
 
  [[a1，a2，a3，a4]，
 [a5，a6，a7，a8]，
 [ a9，a10，a11，a12]，
 [a13] 
] 
  
我知道此问题的纯JavaScript 解决方案，但由于我已经在使用 underscore.js ，我想知道下划线是否为此提供了更好的解决方案。
 
 
 
编辑：
 
 
 
我创建了 jsPerf test 检查下划线解决方案的速度。
解决方案
查看lodash' chunk ： https://lodash.com/docs#chunk  
  var data = [a1，a2，a3，a4，a5，a6，a7，a8，a9，a10，a11，a12， A13]; 
 _.chunk（data，3）; 
 // [
 // [a1，a2，a3]，
 // [a4，a5，a6]，
 // [a7，a8，a9]，
 // [a10，a11，a12]，
 // [a13] 
 //] 
  
 
I need to split a javascript array into n sized chunks.

E.g.: Given this array
["a1", "a2", "a3", "a4", "a5", "a6", "a7", "a8", "a9", "a10", "a11", "a12", "a13"]
and a n equals to 4, the output should be this:
[ ["a1", "a2", "a3", "a4"],
  ["a5", "a6", "a7", "a8"],
  ["a9", "a10", "a11", "a12"],
  ["a13"]
]
I aware of pure javascript solutions for this problem, but since I am already using underscore.js I am wondering if underscore provides a better solution for this.

Edit:

I created a jsPerf test to check how much slower the underscore solution is.
解决方案
Take a look at lodash' chunk: https://lodash.com/docs#chunk
var data = ["a1", "a2", "a3", "a4", "a5", "a6", "a7", "a8", "a9", "a10", "a11", "a12", "a13"];
_.chunk(data, 3); 
// [
//  ["a1", "a2", "a3"],
//  ["a4", "a5", "a6"],
//  ["a7", "a8", "a9"],
//  ["a10", "a11", "a12"],
//  ["a13"]
// ]


                        
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