| /** |
| * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/> |
| * Build: `lodash modularize underscore exports="node" -o ./underscore/` |
| * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/> |
| * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE> |
| * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors |
| * Available under MIT license <http://lodash.com/license> |
| */ |
| var filter = require('./filter'), |
| find = require('./find'), |
| isEmpty = require('../objects/isEmpty'); |
| |
| /** |
| * Performs a deep comparison of each element in a `collection` to the given |
| * `properties` object, returning an array of all elements that have equivalent |
| * property values. |
| * |
| * @static |
| * @memberOf _ |
| * @type Function |
| * @category Collections |
| * @param {Array|Object|string} collection The collection to iterate over. |
| * @param {Object} props The object of property values to filter by. |
| * @returns {Array} Returns a new array of elements that have the given properties. |
| * @example |
| * |
| * var characters = [ |
| * { 'name': 'barney', 'age': 36, 'pets': ['hoppy'] }, |
| * { 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] } |
| * ]; |
| * |
| * _.where(characters, { 'age': 36 }); |
| * // => [{ 'name': 'barney', 'age': 36, 'pets': ['hoppy'] }] |
| * |
| * _.where(characters, { 'pets': ['dino'] }); |
| * // => [{ 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] }] |
| */ |
| function where(collection, properties, first) { |
| return (first && isEmpty(properties)) |
| ? undefined |
| : (first ? find : filter)(collection, properties); |
| } |
| |
| module.exports = where; |