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var baseFlatten = require('./_baseFlatten'),    baseRest = require('./_baseRest'),    baseUniq = require('./_baseUniq'),    isArrayLikeObject = require('./isArrayLikeObject'),    last = require('./last');
/** * This method is like `_.union` except that it accepts `comparator` which * is invoked to compare elements of `arrays`. Result values are chosen from * the first array in which the value occurs. The comparator is invoked * with two arguments: (arrVal, othVal). * * @static * @memberOf _ * @since 4.0.0 * @category Array * @param {...Array} [arrays] The arrays to inspect. * @param {Function} [comparator] The comparator invoked per element. * @returns {Array} Returns the new array of combined values. * @example * * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]; * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }]; * * _.unionWith(objects, others, _.isEqual); * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }] */var unionWith = baseRest(function(arrays) {  var comparator = last(arrays);  comparator = typeof comparator == 'function' ? comparator : undefined;  return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);});
module.exports = unionWith;