1var baseFlatten = require('./_baseFlatten');
2
3/**
4 * Flattens `array` a single level deep.
5 *
6 * @static
7 * @memberOf _
8 * @since 0.1.0
9 * @category Array
10 * @param {Array} array The array to flatten.
11 * @returns {Array} Returns the new flattened array.
12 * @example
13 *
14 * _.flatten([1, [2, [3, [4]], 5]]);
15 * // => [1, 2, [3, [4]], 5]
16 */
17function flatten(array) {
18  var length = array == null ? 0 : array.length;
19  return length ? baseFlatten(array, 1) : [];
20}
21
22module.exports = flatten;
23