lodash/lodash._basexor/index.js

/**
 * lodash 4.4.1 (Custom Build) <https://lodash.com/>
 * Build: `lodash modularize exports="npm" -o ./`
 * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <https://lodash.com/license>
 */
var baseDifference = require('lodash._basedifference'),
    baseUniq = require('lodash._baseuniq');

/**
 * Appends the elements of `values` to `array`.
 *
 * @private
 * @param {Array} array The array to modify.
 * @param {Array} values The values to append.
 * @returns {Array} Returns `array`.
 */
function arrayPush(array, values) {
  var index = -1,
      length = values.length,
      offset = array.length;

  while (++index < length) {
    array[offset + index] = values[index];
  }
  return array;
}

/**
 * The base implementation of methods like `_.xor`, without support for
 * iteratee shorthands, that accepts an array of arrays to inspect.
 *
 * @private
 * @param {Array} arrays The arrays to inspect.
 * @param {Function} [iteratee] The iteratee invoked per element.
 * @param {Function} [comparator] The comparator invoked per element.
 * @returns {Array} Returns the new array of values.
 */
function baseXor(arrays, iteratee, comparator) {
  var index = -1,
      length = arrays.length;

  while (++index < length) {
    var result = result
      ? arrayPush(
          baseDifference(result, arrays[index], iteratee, comparator),
          baseDifference(arrays[index], result, iteratee, comparator)
        )
      : arrays[index];
  }
  return (result && result.length) ? baseUniq(result, iteratee, comparator) : [];
}

module.exports = baseXor;