| var baseOrderBy = require('./_baseOrderBy'), |
| isArray = require('./isArray'); |
| |
| /** |
| * This method is like `_.sortBy` except that it allows specifying the sort |
| * orders of the iteratees to sort by. If `orders` is unspecified, all values |
| * are sorted in ascending order. Otherwise, specify an order of "desc" for |
| * descending or "asc" for ascending sort order of corresponding values. |
| * |
| * @static |
| * @memberOf _ |
| * @since 4.0.0 |
| * @category Collection |
| * @param {Array|Object} collection The collection to iterate over. |
| * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]] |
| * The iteratees to sort by. |
| * @param {string[]} [orders] The sort orders of `iteratees`. |
| * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`. |
| * @returns {Array} Returns the new sorted array. |
| * @example |
| * |
| * var users = [ |
| * { 'user': 'fred', 'age': 48 }, |
| * { 'user': 'barney', 'age': 34 }, |
| * { 'user': 'fred', 'age': 40 }, |
| * { 'user': 'barney', 'age': 36 } |
| * ]; |
| * |
| * // Sort by `user` in ascending order and by `age` in descending order. |
| * _.orderBy(users, ['user', 'age'], ['asc', 'desc']); |
| * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]] |
| */ |
| function orderBy(collection, iteratees, orders, guard) { |
| if (collection == null) { |
| return []; |
| } |
| if (!isArray(iteratees)) { |
| iteratees = iteratees == null ? [] : [iteratees]; |
| } |
| orders = guard ? undefined : orders; |
| if (!isArray(orders)) { |
| orders = orders == null ? [] : [orders]; |
| } |
| return baseOrderBy(collection, iteratees, orders); |
| } |
| |
| module.exports = orderBy; |