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Add support for thisArg in zipWith.

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jdalton
2015-04-18 11:24:11 -07:00
parent a08a3c6096
commit 936a1c2764
2 changed files with 47 additions and 3 deletions
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17
lodash.src.js
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@@ -6069,7 +6069,9 @@
* @memberOf _
* @category Array
* @param {...Array} [arrays] Arrays to be zipped with accumulator.
* @param {Function} accumulator Function used to reduce zipped elements.
* @param {Function|Object|string} [iteratee=_.identity] The function used
* to reduce zipped elements.
* @param {*} [thisArg] The `this` binding of `iteratee`.
* @returns {Array} Returns new array of accumulated groups.
* @example
*
@@ -6077,7 +6079,18 @@
* // => [11, 22, 33]
*/
var zipWith = restParam(function(arrays) {
var iteratee = arrays.pop();
var length = arrays.length,
iteratee = arrays[length - 2],
thisArg = arrays[length - 1];
if (length > 2 && !isArray(iteratee)) {
length -= 2;
} else {
iteratee = (length > 1 && !isArray(thisArg)) ? (--length, thisArg) : undefined;
thisArg = undefined;
}
arrays.length = length;
iteratee = getCallback(iteratee, thisArg, 4);
return arrayMap(unzip(arrays), function(array) {
return arrayReduce(array, iteratee, undefined, true);
});