linuxcommandgitbook/node_modules/lodash/array/xor.js

var arrayPush = require('../internal/arrayPush'),
    baseDifference = require('../internal/baseDifference'),
    baseUniq = require('../internal/baseUniq'),
    isArrayLike = require('../internal/isArrayLike');

/**
 * Creates an array of unique values that is the [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
 * of the provided arrays.
 *
 * @static
 * @memberOf _
 * @category Array
 * @param {...Array} [arrays] The arrays to inspect.
 * @returns {Array} Returns the new array of values.
 * @example
 *
 * _.xor([1, 2], [4, 2]);
 * // => [1, 4]
 */
function xor() {
  var index = -1,
      length = arguments.length;

  while (++index < length) {
    var array = arguments[index];
    if (isArrayLike(array)) {
      var result = result
        ? arrayPush(baseDifference(result, array), baseDifference(array, result))
        : array;
    }
  }
  return result ? baseUniq(result) : [];
}

module.exports = xor;