_.every

_.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

1. collection (Array|Object): The collection to iterate over.
2. [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