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Optimize _.chunk.

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John-David Dalton
2014-11-08 19:34:37 -08:00
parent a2330fb630
commit 1b842f86ca
1 changed files with 3 additions and 2 deletions
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lodash.js
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@@ -3370,12 +3370,13 @@
* // => [['a', 'b', 'c'], ['d']] * // => [['a', 'b', 'c'], ['d']]
*/ */
function chunk(array, size, guard) { function chunk(array, size, guard) {
size = (guard || size == null) ? 1 : nativeMax(+size || 1, 1);
var index = 0, var index = 0,
length = array ? array.length : 0, length = array ? array.length : 0,
resIndex = -1, resIndex = -1,
result = []; result = Array(ceil(length / size));
size = (guard || size == null) ? 1 : nativeMax(+size || 1, 1);
while (index < length) { while (index < length) {
result[++resIndex] = slice(array, index, (index += size)); result[++resIndex] = slice(array, index, (index += size));
} }