将数组拆分为N长度的块

Question

如何将一个数组(有10个项目)拆分为4个包含最多n项目的块.

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);

它打印:

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

n = 3但是,上述假定值应该是动态的.

谢谢

Answer 1

它可能是这样的:

var arrays = [], size = 3;

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

console.log(arrays);

请参阅splice Array的方法.

Answer 2

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})