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/node_modules/lodash/every.js

https://bitbucket.org/coleman333/smartsite
JavaScript | 56 lines | 13 code | 2 blank | 41 comment | 2 complexity | c2ef0c6787b4346a80447e4a27783340 MD5 | raw file
 1var arrayEvery = require('./_arrayEvery'),
 2    baseEvery = require('./_baseEvery'),
 3    baseIteratee = require('./_baseIteratee'),
 4    isArray = require('./isArray'),
 5    isIterateeCall = require('./_isIterateeCall');
 6
 7/**
 8 * Checks if `predicate` returns truthy for **all** elements of `collection`.
 9 * Iteration is stopped once `predicate` returns falsey. The predicate is
10 * invoked with three arguments: (value, index|key, collection).
11 *
12 * **Note:** This method returns `true` for
13 * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
14 * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
15 * elements of empty collections.
16 *
17 * @static
18 * @memberOf _
19 * @since 0.1.0
20 * @category Collection
21 * @param {Array|Object} collection The collection to iterate over.
22 * @param {Function} [predicate=_.identity] The function invoked per iteration.
23 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
24 * @returns {boolean} Returns `true` if all elements pass the predicate check,
25 *  else `false`.
26 * @example
27 *
28 * _.every([true, 1, null, 'yes'], Boolean);
29 * // => false
30 *
31 * var users = [
32 *   { 'user': 'barney', 'age': 36, 'active': false },
33 *   { 'user': 'fred',   'age': 40, 'active': false }
34 * ];
35 *
36 * // The `_.matches` iteratee shorthand.
37 * _.every(users, { 'user': 'barney', 'active': false });
38 * // => false
39 *
40 * // The `_.matchesProperty` iteratee shorthand.
41 * _.every(users, ['active', false]);
42 * // => true
43 *
44 * // The `_.property` iteratee shorthand.
45 * _.every(users, 'active');
46 * // => false
47 */
48function every(collection, predicate, guard) {
49  var func = isArray(collection) ? arrayEvery : baseEvery;
50  if (guard && isIterateeCall(collection, predicate, guard)) {
51    predicate = undefined;
52  }
53  return func(collection, baseIteratee(predicate, 3));
54}
55
56module.exports = every;