1  var baseFlatten = require('./_baseFlatten'),
 2      toInteger = require('./toInteger');
 3  
 4  /**
 5   * Recursively flatten `array` up to `depth` times.
 6   *
 7   * @static
 8   * @memberOf _
 9   * @since 4.4.0
10   * @category Array
11   * @param {Array} array The array to flatten.
12   * @param {number} [depth=1] The maximum recursion depth.
13   * @returns {Array} Returns the new flattened array.
14   * @example
15   *
16   * var array = [1, [2, [3, [4]], 5]];
17   *
18   * _.flattenDepth(array, 1);
19   * // => [1, 2, [3, [4]], 5]
20   *
21   * _.flattenDepth(array, 2);
22   * // => [1, 2, 3, [4], 5]
23   */
24  function flattenDepth(array, depth) {
25    var length = array == null ? 0 : array.length;
26    if (!length) {
27      return [];
28    }
29    depth = depth === undefined ? 1 : toInteger(depth);
30    return baseFlatten(array, depth);
31  }
32  
33  module.exports = flattenDepth;