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+var baseSortByOrder = require('../internal/baseSortByOrder'),
+ isArray = require('../lang/isArray'),
+ isIterateeCall = require('../internal/isIterateeCall');
+
+/**
+ * This method is like `_.sortByAll` 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, a value is sorted in
+ * ascending order if its corresponding order is "asc", and descending if "desc".
+ *
+ * If a property name is provided for an iteratee the created `_.property`
+ * style callback returns the property value of the given element.
+ *
+ * If an object is provided for an iteratee the created `_.matches` style
+ * callback returns `true` for elements that have the properties of the given
+ * object, else `false`.
+ *
+ * @static
+ * @memberOf _
+ * @category Collection
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
+ * @param {boolean[]} [orders] The sort orders of `iteratees`.
+ * @param- {Object} [guard] Enables use as a callback for functions like `_.reduce`.
+ * @returns {Array} Returns the new sorted array.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'fred', 'age': 48 },
+ * { 'user': 'barney', 'age': 34 },
+ * { 'user': 'fred', 'age': 42 },
+ * { 'user': 'barney', 'age': 36 }
+ * ];
+ *
+ * // sort by `user` in ascending order and by `age` in descending order
+ * _.map(_.sortByOrder(users, ['user', 'age'], ['asc', 'desc']), _.values);
+ * // => [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]]
+ */
+function sortByOrder(collection, iteratees, orders, guard) {
+ if (collection == null) {
+ return [];
+ }
+ if (guard && isIterateeCall(iteratees, orders, guard)) {
+ orders = undefined;
+ }
+ if (!isArray(iteratees)) {
+ iteratees = iteratees == null ? [] : [iteratees];
+ }
+ if (!isArray(orders)) {
+ orders = orders == null ? [] : [orders];
+ }
+ return baseSortByOrder(collection, iteratees, orders);
+}
+
+module.exports = sortByOrder;