You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1.8 KiB
56 lines
1.8 KiB
var arrayEvery = require('./_arrayEvery'), |
|
baseEvery = require('./_baseEvery'), |
|
baseIteratee = require('./_baseIteratee'), |
|
isArray = require('./isArray'), |
|
isIterateeCall = require('./_isIterateeCall'); |
|
|
|
/** |
|
* Checks if `predicate` returns truthy for **all** elements of `collection`. |
|
* Iteration is stopped once `predicate` returns falsey. The predicate is |
|
* invoked with three arguments: (value, index|key, collection). |
|
* |
|
* **Note:** This method returns `true` for |
|
* [empty collections](https://en.wikipedia.org/wiki/Empty_set) because |
|
* [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of |
|
* elements of empty collections. |
|
* |
|
* @static |
|
* @memberOf _ |
|
* @since 0.1.0 |
|
* @category Collection |
|
* @param {Array|Object} collection The collection to iterate over. |
|
* @param {Function} [predicate=_.identity] The function invoked per iteration. |
|
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. |
|
* @returns {boolean} Returns `true` if all elements pass the predicate check, |
|
* else `false`. |
|
* @example |
|
* |
|
* _.every([true, 1, null, 'yes'], Boolean); |
|
* // => false |
|
* |
|
* var users = [ |
|
* { 'user': 'barney', 'age': 36, 'active': false }, |
|
* { 'user': 'fred', 'age': 40, 'active': false } |
|
* ]; |
|
* |
|
* // The `_.matches` iteratee shorthand. |
|
* _.every(users, { 'user': 'barney', 'active': false }); |
|
* // => false |
|
* |
|
* // The `_.matchesProperty` iteratee shorthand. |
|
* _.every(users, ['active', false]); |
|
* // => true |
|
* |
|
* // The `_.property` iteratee shorthand. |
|
* _.every(users, 'active'); |
|
* // => false |
|
*/ |
|
function every(collection, predicate, guard) { |
|
var func = isArray(collection) ? arrayEvery : baseEvery; |
|
if (guard && isIterateeCall(collection, predicate, guard)) { |
|
predicate = undefined; |
|
} |
|
return func(collection, baseIteratee(predicate, 3)); |
|
} |
|
|
|
module.exports = every;
|
|
|