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67 lines
2.0 KiB
JavaScript
67 lines
2.0 KiB
JavaScript
/**
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* lodash 3.1.0 (Custom Build) <https://lodash.com/>
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* Build: `lodash modern modularize exports="npm" -o ./`
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* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <https://lodash.com/license>
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*/
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var arrayMap = require('lodash._arraymap'),
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arrayMax = require('lodash._arraymax');
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/**
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* The base implementation of `_.property` without support for deep paths.
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*
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* @private
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* @param {string} key The key of the property to get.
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* @returns {Function} Returns the new function.
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*/
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function baseProperty(key) {
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return function(object) {
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return object == null ? undefined : object[key];
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};
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}
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/**
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* Gets the "length" property value of `object`.
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*
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* **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792)
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* in Safari on iOS 8.1 ARM64.
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*
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* @private
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* @param {Object} object The object to query.
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* @returns {*} Returns the "length" value.
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*/
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var getLength = baseProperty('length');
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/**
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* This method is like `_.zip` except that it accepts an array of grouped
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* elements and creates an array regrouping the elements to their pre-`_.zip`
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* configuration.
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*
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* @static
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* @memberOf _
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* @category Array
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* @param {Array} array The array of grouped elements to process.
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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(['fred', 'barney'], [30, 40], [true, false]);
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* // => [['fred', 30, true], ['barney', 40, false]]
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*
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* _.unzip(zipped);
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* // => [['fred', 'barney'], [30, 40], [true, false]]
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*/
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function unzip(array) {
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var index = -1,
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length = (array && array.length && arrayMax(arrayMap(array, getLength))) >>> 0,
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result = Array(length);
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while (++index < length) {
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result[index] = arrayMap(array, baseProperty(index));
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}
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return result;
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}
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module.exports = unzip;
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