var _curry1 = require('./internal/_curry1');
var _makeFlat = require('./internal/_makeFlat');


/**
 * Returns a new list by pulling every item out of it (and all its sub-arrays)
 * and putting them in a new array, depth-first.
 *
 * @func
 * @memberOf R
 * @since v0.1.0
 * @category List
 * @sig [a] -> [b]
 * @param {Array} list The array to consider.
 * @return {Array} The flattened list.
 * @see R.unnest
 * @example
 *
 *      R.flatten([1, 2, [3, 4], 5, [6, [7, 8, [9, [10, 11], 12]]]]);
 *      //=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
 */
module.exports = _curry1(_makeFlat(true));