Javascript 将数组拆分为长度为 N 的块

Split array into chunks of N length

提问by mrdaliri

How to split an array (which has 10 items) into 4 chunks, which contain a maximum of nitems.

如何将数组（有 10 个项目）拆分为 4 个块，其中最多包含n项目。

var a = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'];
//a function splits it to four arrays.
console.log(b, c, d, e);

And it prints:

它打印：

['a', 'b', 'c']
['d', 'e', 'f']
['j', 'h', 'i']
['j']

The above assumes n = 3, however, the value should be dynamic.

n = 3然而，上述假设值应该是动态的。

Thanks

谢谢

回答by ZER0

It could be something like that:

它可能是这样的：

var arrays = [], size = 3;

while (a.length > 0)
    arrays.push(a.splice(0, size));

console.log(arrays);

See spliceArray's method.

参见spliceArray 的方法。

回答by Mirodil

Maybe this code helps:

也许这段代码有帮助：

var chunk_size = 10;
var arr = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17];
var groups = arr.map( function(e,i){ 
     return i%chunk_size===0 ? arr.slice(i,i+chunk_size) : null; 
}).filter(function(e){ return e; });
console.log({arr, groups})