1 | import arrayEvery from './_arrayEvery.js';
|
---|
2 | import baseEvery from './_baseEvery.js';
|
---|
3 | import baseIteratee from './_baseIteratee.js';
|
---|
4 | import isArray from './isArray.js';
|
---|
5 | import isIterateeCall from './_isIterateeCall.js';
|
---|
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 | */
|
---|
48 | function 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 |
|
---|
56 | export default every;
|
---|