post-e-voting/source-code/scytl-cryptolib/cryptolib-js-zkproof/lib/array.js

/*
 * Copyright 2018 Scytl Secure Electronic Voting SA
 *
 * All rights reserved
 *
 * See our extended copyright notice in *file 'Copyright.txt' which is part of this source code package
 */
/* jshint node:true */
'use strict';

/**
 * Defines an equality method for Array objects. Only intended for internal use.
 *
 * @function equals
 * @private
 * @param {Array}
 *            array The Array object that should be checked against this Array
 *            object for equality.
 * @param {boolean}
 *            [checkOrder=false] If <code>true</code>, checks if the element
 *            order is the same in both Array objects.
 * @returns {boolean} <code>true</code> if the equality holds,
 *          <code>false</code> otherwise.
 */
Array.prototype.equals = function(array, checkOrder) {
  if (!array) {
    return false;
  }

  if (arguments.length === 1) {
    checkOrder = true;
  }

  if (this.length !== array.length) {
    return false;
  }

  for (var i = 0; i < this.length; i++) {
    if (this[i] instanceof Array && array[i] instanceof Array) {
      if (!this[i].equals(array[i], checkOrder)) {
        return false;
      }
    } else if (checkOrder && (!this[i].equals(array[i]))) {
      return false;
    } else if (!checkOrder) {
      return this.sort().equals(array.sort(), true);
    }
  }
  return true;
};