| 1 | var apply = require('./_apply'),
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| 2 | arrayMap = require('./_arrayMap'),
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| 3 | unzip = require('./unzip');
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| 4 |
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| 5 | /**
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| 6 | * This method is like `_.unzip` except that it accepts `iteratee` to specify
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| 7 | * how regrouped values should be combined. The iteratee is invoked with the
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| 8 | * elements of each group: (...group).
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| 9 | *
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| 10 | * @static
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| 11 | * @memberOf _
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| 12 | * @since 3.8.0
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| 13 | * @category Array
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| 14 | * @param {Array} array The array of grouped elements to process.
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| 15 | * @param {Function} [iteratee=_.identity] The function to combine
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| 16 | * regrouped values.
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| 17 | * @returns {Array} Returns the new array of regrouped elements.
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| 18 | * @example
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| 19 | *
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| 20 | * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
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| 21 | * // => [[1, 10, 100], [2, 20, 200]]
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| 22 | *
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| 23 | * _.unzipWith(zipped, _.add);
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| 24 | * // => [3, 30, 300]
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| 25 | */
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| 26 | function unzipWith(array, iteratee) {
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| 27 | if (!(array && array.length)) {
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| 28 | return [];
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| 29 | }
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| 30 | var result = unzip(array);
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| 31 | if (iteratee == null) {
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| 32 | return result;
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| 33 | }
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| 34 | return arrayMap(result, function(group) {
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| 35 | return apply(iteratee, undefined, group);
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| 36 | });
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| 37 | }
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| 38 |
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| 39 | module.exports = unzipWith;
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