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75 lines
2.7 KiB
JavaScript
75 lines
2.7 KiB
JavaScript
/**
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* lodash 3.0.0 (Custom Build) <https://lodash.com/>
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* Build: `lodash modern modularize exports="npm" -o ./`
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* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.7.0 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <https://lodash.com/license>
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*/
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var baseCallback = require('lodash._basecallback'),
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baseEach = require('lodash._baseeach'),
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baseFind = require('lodash._basefind'),
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findIndex = require('lodash.findindex'),
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isArray = require('lodash.isarray');
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/**
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* Iterates over elements of `collection`, returning the first element
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* `predicate` returns truthy for. The predicate is bound to `thisArg` and
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* invoked with three arguments; (value, index|key, collection).
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*
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* If a property name is provided for `predicate` the created `_.property`
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* style callback returns the property value of the given element.
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*
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* If a value is also provided for `thisArg` the created `_.matchesProperty`
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* style callback returns `true` for elements that have a matching property
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* value, else `false`.
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*
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* If an object is provided for `predicate` the created `_.matches` style
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* callback returns `true` for elements that have the properties of the given
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* object, else `false`.
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*
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* @static
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* @memberOf _
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* @alias detect
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* @category Collection
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* @param {Array|Object|string} collection The collection to search.
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* @param {Function|Object|string} [predicate=_.identity] The function invoked
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* per iteration.
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* @param {*} [thisArg] The `this` binding of `predicate`.
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* @returns {*} Returns the matched element, else `undefined`.
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* @example
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*
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* var users = [
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* { 'user': 'barney', 'age': 36, 'active': true },
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* { 'user': 'fred', 'age': 40, 'active': false },
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* { 'user': 'pebbles', 'age': 1, 'active': true }
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* ];
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*
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* _.result(_.find(users, function(chr) {
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* return chr.age < 40;
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* }), 'user');
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* // => 'barney'
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*
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* // using the `_.matches` callback shorthand
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* _.result(_.find(users, { 'age': 1, 'active': true }), 'user');
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* // => 'pebbles'
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*
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* // using the `_.matchesProperty` callback shorthand
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* _.result(_.find(users, 'active', false), 'user');
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* // => 'fred'
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*
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* // using the `_.property` callback shorthand
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* _.result(_.find(users, 'active'), 'user');
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* // => 'barney'
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*/
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function find(collection, predicate, thisArg) {
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if (isArray(collection)) {
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var index = findIndex(collection, predicate, thisArg);
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return index > -1 ? collection[index] : undefined;
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}
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predicate = baseCallback(predicate, thisArg, 3);
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return baseFind(collection, predicate, baseEach);
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}
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module.exports = find;
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