time-to-botec

Benchmark sampling in different programming languages
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unzip.js (1282B)

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