mirror of
https://github.com/whoisclebs/lodash.git
synced 2026-02-02 08:07:50 +00:00
115 lines
4.1 KiB
JavaScript
115 lines
4.1 KiB
JavaScript
/**
|
|
* lodash 3.0.0 (Custom Build) <https://lodash.com/>
|
|
* Build: `lodash modern modularize exports="npm" -o ./`
|
|
* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
|
|
* Based on Underscore.js 1.7.0 <http://underscorejs.org/LICENSE>
|
|
* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
|
|
* Available under MIT license <https://lodash.com/license>
|
|
*/
|
|
var baseCallback = require('lodash._basecallback'),
|
|
baseCompareAscending = require('lodash._basecompareascending'),
|
|
baseEach = require('lodash._baseeach'),
|
|
baseSortBy = require('lodash._basesortby'),
|
|
isIterateeCall = require('lodash._isiterateecall');
|
|
|
|
/**
|
|
* Used by `_.sortBy` to compare transformed elements of a collection and stable
|
|
* sort them in ascending order.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to compare to `other`.
|
|
* @param {Object} other The object to compare to `object`.
|
|
* @returns {number} Returns the sort order indicator for `object`.
|
|
*/
|
|
function compareAscending(object, other) {
|
|
return baseCompareAscending(object.criteria, other.criteria) || (object.index - other.index);
|
|
}
|
|
|
|
/**
|
|
* Used as the maximum length of an array-like value.
|
|
* See the [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer)
|
|
* for more details.
|
|
*/
|
|
var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
|
|
|
|
/**
|
|
* Checks if `value` is a valid array-like length.
|
|
*
|
|
* **Note:** This function is based on ES `ToLength`. See the
|
|
* [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
|
|
* for more details.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
|
|
*/
|
|
function isLength(value) {
|
|
return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
|
|
}
|
|
|
|
/**
|
|
* Creates an array of elements, sorted in ascending order by the results of
|
|
* running each element in a collection through `iteratee`. This method performs
|
|
* a stable sort, that is, it preserves the original sort order of equal elements.
|
|
* The `iteratee` is bound to `thisArg` and invoked with three arguments;
|
|
* (value, index|key, collection).
|
|
*
|
|
* If a property name is provided for `predicate` the created `_.property`
|
|
* style callback returns the property value of the given element.
|
|
*
|
|
* If a value is also provided for `thisArg` the created `_.matchesProperty`
|
|
* style callback returns `true` for elements that have a matching property
|
|
* value, else `false`.
|
|
*
|
|
* If an object is provided for `predicate` 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 {Array|Function|Object|string} [iteratee=_.identity] The function
|
|
* invoked per iteration. If a property name or an object is provided it is
|
|
* used to create a `_.property` or `_.matches` style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {Array} Returns the new sorted array.
|
|
* @example
|
|
*
|
|
* _.sortBy([1, 2, 3], function(n) {
|
|
* return Math.sin(n);
|
|
* });
|
|
* // => [3, 1, 2]
|
|
*
|
|
* _.sortBy([1, 2, 3], function(n) {
|
|
* return this.sin(n);
|
|
* }, Math);
|
|
* // => [3, 1, 2]
|
|
*
|
|
* var users = [
|
|
* { 'user': 'fred' },
|
|
* { 'user': 'pebbles' },
|
|
* { 'user': 'barney' }
|
|
* ];
|
|
*
|
|
* // using the `_.property` callback shorthand
|
|
* _.pluck(_.sortBy(users, 'user'), 'user');
|
|
* // => ['barney', 'fred', 'pebbles']
|
|
*/
|
|
function sortBy(collection, iteratee, thisArg) {
|
|
var index = -1,
|
|
length = collection ? collection.length : 0,
|
|
result = isLength(length) ? Array(length) : [];
|
|
|
|
if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
|
|
iteratee = null;
|
|
}
|
|
iteratee = baseCallback(iteratee, thisArg, 3);
|
|
baseEach(collection, function(value, key, collection) {
|
|
result[++index] = { 'criteria': iteratee(value, key, collection), 'index': index, 'value': value };
|
|
});
|
|
return baseSortBy(result, compareAscending);
|
|
}
|
|
|
|
module.exports = sortBy;
|