48 lines
1.6 KiB
JavaScript
48 lines
1.6 KiB
JavaScript
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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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