findAll
findAll(iterator[, context]) -> Array
Returns all the elements for which the iterator returned true
. Aliased as select
.
This is a sort of all-purpose version of grep
(which is specific to
String representations of the values). findAll
lets you define your
predicate for the elements, providing maximum flexibility.
The optional context
parameter is what the iterator function will be bound to. If used, the this
keyword inside the iterator will point to the object given by the argument.
Examples
$R(1, 10).findAll(function(n) { return 0 == n % 2; })
// -> [2, 4, 6, 8, 10]
[ 'hello', 'world', 'this', 'is', 'nice'].findAll(function(s) {
return s.length >= 5;
})
// -> ['hello', 'world']
See also
The reject
method is the opposite of this one. If you need to split elements in two groups based upon a predicate, look at partition
.