HORIZON PROJECT

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

/** Used as references for various `Number` constants. */

var INFINITY = 1 / 0;

/**

 * Recursively flattens `array`.

 *

 * @static

 * @memberOf _

 * @since 3.0.0

 * @category Array

 * @param {Array} array The array to flatten.

 * @returns {Array} Returns the new flattened array.

 * @example

 *

 * _.flattenDeep([1, [2, [3, [4]], 5]]);

 * // => [1, 2, 3, 4, 5]

 */

function flattenDeep(array) {

  var length = array == null ? 0 : array.length;

  return length ? baseFlatten(array, INFINITY) : [];

}

module.exports = flattenDeep;