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