instance method Enumerable#all
Enumerable#all([iterator = Prototype.K[, context]]) → Boolean
-
iterator
(Function
) – An optional function to use to evaluate each element in the enumeration; the function should return the value to test. If this is not provided, the element itself is tested. -
context
(Object
) – An optional object to use asthis
within calls to the iterator.
Determines whether all the elements are "truthy" (boolean-equivalent to
true
), either directly or through computation by the provided iterator.
Stops on the first falsy element found (e.g., the first element that
is boolean-equivalent to false
, such as undefined
, 0
, or indeed
false
);
Examples
[].all();
// -> true (empty arrays have no elements that could be falsy)
$R(1, 5).all();
// -> true (all values in [1..5] are truthy)
[0, 1, 2].all();
// -> false (with only one loop cycle: 0 is falsy)
[9, 10, 15].all(function(n) { return n >= 10; });
// -> false (the iterator returns false on 9)
Aliased as: Enumerable#every