1 | var arrayFilter = require('./_arrayFilter'),
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2 | arrayMap = require('./_arrayMap'),
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3 | baseProperty = require('./_baseProperty'),
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4 | baseTimes = require('./_baseTimes'),
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5 | isArrayLikeObject = require('./isArrayLikeObject');
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6 |
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7 | /* Built-in method references for those with the same name as other `lodash` methods. */
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8 | var nativeMax = Math.max;
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9 |
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10 | /**
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11 | * This method is like `_.zip` except that it accepts an array of grouped
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12 | * elements and creates an array regrouping the elements to their pre-zip
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13 | * configuration.
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14 | *
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15 | * @static
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16 | * @memberOf _
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17 | * @since 1.2.0
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18 | * @category Array
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19 | * @param {Array} array The array of grouped elements to process.
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20 | * @returns {Array} Returns the new array of regrouped elements.
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21 | * @example
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22 | *
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23 | * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
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24 | * // => [['a', 1, true], ['b', 2, false]]
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25 | *
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26 | * _.unzip(zipped);
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27 | * // => [['a', 'b'], [1, 2], [true, false]]
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28 | */
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29 | function unzip(array) {
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30 | if (!(array && array.length)) {
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31 | return [];
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32 | }
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33 | var length = 0;
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34 | array = arrayFilter(array, function(group) {
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35 | if (isArrayLikeObject(group)) {
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36 | length = nativeMax(group.length, length);
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37 | return true;
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38 | }
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39 | });
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40 | return baseTimes(length, function(index) {
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41 | return arrayMap(array, baseProperty(index));
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42 | });
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43 | }
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44 |
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45 | module.exports = unzip;
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