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Optimize _.reduce and _.reduceRight.

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jdalton
2015-03-11 00:42:31 -07:00
parent 56c5ebcb71
commit b535c4f321
1 changed files with 8 additions and 4 deletions
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12
lodash.src.js
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@@ -6641,8 +6641,10 @@
* // => { 'a': 3, 'b': 6 } (iteration order is not guaranteed) * // => { 'a': 3, 'b': 6 } (iteration order is not guaranteed)
*/ */
function reduce(collection, iteratee, accumulator, thisArg) { function reduce(collection, iteratee, accumulator, thisArg) {
var func = isArray(collection) ? arrayReduce : baseReduce; var initFromArray = arguments.length < 3;
return func(collection, getCallback(iteratee, thisArg, 4), accumulator, arguments.length < 3, baseEach); return (typeof iteratee == 'function' && typeof thisArg == 'undefined' && isArray(collection))
? arrayReduce(collection, iteratee, accumulator, initFromArray)
: baseReduce(collection, getCallback(iteratee, thisArg, 4), accumulator, initFromArray, baseEach);
} }
/** /**
@@ -6668,8 +6670,10 @@
* // => [4, 5, 2, 3, 0, 1] * // => [4, 5, 2, 3, 0, 1]
*/ */
function reduceRight(collection, iteratee, accumulator, thisArg) { function reduceRight(collection, iteratee, accumulator, thisArg) {
var func = isArray(collection) ? arrayReduceRight : baseReduce; var initFromArray = arguments.length < 3;
return func(collection, getCallback(iteratee, thisArg, 4), accumulator, arguments.length < 3, baseEachRight); return (typeof iteratee == 'function' && typeof thisArg == 'undefined' && isArray(collection))
? arrayReduceRight(collection, iteratee, accumulator, initFromArray)
: baseReduce(collection, getCallback(iteratee, thisArg, 4), accumulator, initFromArray, baseEachRight);
} }
/** /**