javascript - how to split an array into anther paired array

Question

I want a very simple feature, I hope use short and beautiful code to do below

input:

[1,2,3,4,5,6,7,8,9,10]

output:

[[1,2],[3,4],[5,6],[7,8],[9,10]]

how to do this in javascript

Answer 1

配列を変更する別のフレーバーを次に示します（偶数の配列エントリを想定しています）。

var orig = [1,2,3,4,5,6,7,8,9,10];
for (var i = 0; i < orig.length; i+=2) {
    orig[i/2] = [orig[i], orig[i+1]];
}
orig.length /= 2;

Answer 2

function splitPairs(arr) {
  var newArr = new Array(Math.round(arr.length / 2));
  for (var i=0, l=arr.length; i<l; i+=2) {
    newArr[i>>1] = [arr[i], arr[i+1]];
  }
  return newArr;
}

Fiddle

Answer 3

2行：

function cut(ar)
{
    for(var i=0,l=ar.length,tmpar=[];i<l;i+=2)tmpar[tmpar.length]=[ar[i],ar[i+1]];
    return tmpar;
}

http://jsfiddle.net/7yd26/3/

また、配列内の要素の数が奇数の場合も機能します：http: //jsfiddle.net/7yd26/4/