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Simplify _.sum.

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jdalton
2015-06-18 07:45:03 -07:00
parent 535eec5366
commit 4bcb99a6b9
1 changed files with 8 additions and 12 deletions
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20
lodash.src.js
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@@ -1606,18 +1606,20 @@
} }
/** /**
* A specialized version of `_.sum` for arrays without support for iteratees. * A specialized version of `_.sum` for arrays without support for callback
* shorthands and `this` binding..
* *
* @private * @private
* @param {Array} array The array to iterate over. * @param {Array} array The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {number} Returns the sum. * @returns {number} Returns the sum.
*/ */
function arraySum(array) { function arraySum(array, iteratee) {
var length = array.length, var length = array.length,
result = 0; result = 0;
while (length--) { while (length--) {
result += +array[length] || 0; result += +iteratee(array[length]) || 0;
} }
return result; return result;
} }
@@ -11948,15 +11950,9 @@
if (thisArg && isIterateeCall(collection, iteratee, thisArg)) { if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
iteratee = undefined; iteratee = undefined;
} }
var callback = getCallback(), iteratee = getCallback(iteratee, thisArg, 3);
noIteratee = iteratee == null; return iteratee.length == 1
? arraySum(isArray(collection) ? collection : toIterable(collection), iteratee)
if (!(noIteratee && callback === baseCallback)) {
noIteratee = false;
iteratee = callback(iteratee, thisArg, 3);
}
return noIteratee
? arraySum(isArray(collection) ? collection : toIterable(collection))
: baseSum(collection, iteratee); : baseSum(collection, iteratee);
} }