HORIZON PROJECT

var baseFlatten = require('./_baseFlatten'),

    baseRest = require('./_baseRest'),

    baseUniq = require('./_baseUniq'),

    isArrayLikeObject = require('./isArrayLikeObject');

/**

 * Creates an array of unique values, in order, from all given arrays using

 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)

 * for equality comparisons.

 *

 * @static

 * @memberOf _

 * @since 0.1.0

 * @category Array

 * @param {...Array} [arrays] The arrays to inspect.

 * @returns {Array} Returns the new array of combined values.

 * @example

 *

 * _.union([2], [1, 2]);

 * // => [2, 1]

 */

var union = baseRest(function(arrays) {

  return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));

});

module.exports = union;