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40 lines
1.0 KiB
40 lines
1.0 KiB
5 years ago
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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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