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39 lines
1.0 KiB
39 lines
1.0 KiB
var apply = require('./_apply'), |
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arrayMap = require('./_arrayMap'), |
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unzip = require('./unzip'); |
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/** |
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* This method is like `_.unzip` except that it accepts `iteratee` to specify |
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* how regrouped values should be combined. The iteratee is invoked with the |
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* elements of each group: (...group). |
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* |
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* @static |
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* @memberOf _ |
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* @since 3.8.0 |
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* @category Array |
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* @param {Array} array The array of grouped elements to process. |
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* @param {Function} [iteratee=_.identity] The function to combine |
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* regrouped values. |
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* @returns {Array} Returns the new array of regrouped elements. |
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* @example |
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* |
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* var zipped = _.zip([1, 2], [10, 20], [100, 200]); |
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* // => [[1, 10, 100], [2, 20, 200]] |
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* |
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* _.unzipWith(zipped, _.add); |
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* // => [3, 30, 300] |
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*/ |
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function unzipWith(array, iteratee) { |
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if (!(array && array.length)) { |
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return []; |
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} |
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var result = unzip(array); |
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if (iteratee == null) { |
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return result; |
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} |
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return arrayMap(result, function(group) { |
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return apply(iteratee, undefined, group); |
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}); |
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} |
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module.exports = unzipWith;
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