tui-code-snippet/array/zip.js

TOAST UI Utility: CodeSnippet

/**
 * @fileoverview Zip together multiple lists into a single array.
 * @author NHN FE Development Lab <dl_javascript@nhn.com>
 */

'use strict';

var forEach = require('../collection/forEach');

/**
 * Zip together multiple lists into a single array.
 * @param {...Array} ...Arrays - Arrays to be zipped
 * @returns {Array}
 * @memberof module:array
 * @example
 * // ES6
 * import zip from 'tui-code-snippet/array/zip';
 * 
 * // CommonJS
 * const zip = require('tui-code-snippet/array/zip');
 *
 * const result = zip([1, 2, 3], ['a', 'b', 'c'], [true, false, true]);
 * console.log(result[0]); // [1, 'a', true]
 * console.log(result[1]); // [2, 'b', false]
 * console.log(result[2]); // [3, 'c', true]
 */
function zip() {
  var arr2d = Array.prototype.slice.call(arguments);
  var result = [];

  forEach(arr2d, function(arr) {
    forEach(arr, function(value, index) {
      if (!result[index]) {
        result[index] = [];
      }
      result[index].push(value);
    });
  });

  return result;
}

module.exports = zip;