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					48 lines
				
				1.6 KiB
			
		
		
			
		
	
	
					48 lines
				
				1.6 KiB
			| 
											3 years ago
										 | 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; |