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

/**

* Flattens `array` a single level deep.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The array to flatten.
* @returns {Array} Returns the new flattened array.
* @example
*
* _.flatten([1, [2, [3, [4]], 5]]);
* // => [1, 2, [3, [4]], 5]
*/

function flatten(array) {

var length = array == null ? 0 : array.length;
return length ? baseFlatten(array, 1) : [];

}

module.exports = flatten;