Created
June 23, 2018 06:37
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Splitting a JS array into N arrays
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| function chunkify(a, n, balanced) { | |
| if (n < 2) | |
| return [a]; | |
| var len = a.length, | |
| out = [], | |
| i = 0, | |
| size; | |
| if (len % n === 0) { | |
| size = Math.floor(len / n); | |
| while (i < len) { | |
| out.push(a.slice(i, i += size)); | |
| } | |
| } | |
| else if (balanced) { | |
| while (i < len) { | |
| size = Math.ceil((len - i) / n--); | |
| out.push(a.slice(i, i += size)); | |
| } | |
| } | |
| else { | |
| n--; | |
| size = Math.floor(len / n); | |
| if (len % size === 0) | |
| size--; | |
| while (i < size * n) { | |
| out.push(a.slice(i, i += size)); | |
| } | |
| out.push(a.slice(size * n)); | |
| } | |
| return out; | |
| } |
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