var arrayPush = require('./_arrayPush'),

baseFlatten = require('./_baseFlatten'),
copyArray = require('./_copyArray'),
isArray = require('./isArray');

/**

* Creates a new array concatenating `array` with any additional arrays
* and/or values.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to concatenate.
* @param {...*} [values] The values to concatenate.
* @returns {Array} Returns the new concatenated array.
* @example
*
* var array = [1];
* var other = _.concat(array, 2, [3], [[4]]);
*
* console.log(other);
* // => [1, 2, 3, [4]]
*
* console.log(array);
* // => [1]
*/

function concat() {

var length = arguments.length;
if (!length) {
  return [];
}
var args = Array(length - 1),
    array = arguments[0],
    index = length;

while (index--) {
  args[index - 1] = arguments[index];
}
return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));

}

module.exports = concat;