_.every(collection, [predicate=_.identity])
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 because everything is true of elements of empty collections.
Since
0.1.0
Arguments
-
collection
(Array|Object): The collection to iterate over. -
[predicate=_.identity]
(Function): The function invoked per iteration.
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
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