An extended IteratorIterator that applies a closure transformation to each element during iteration.
Description
This class allows applying a transformation function dynamically while iterating over an existing Traversable.
Usage Example:
Description
use FastForward\Iterator\ClosureIteratorIterator;
use ArrayIterator;
$array = [1, 2, 3, 4, 5];
$iterator = new ClosureIteratorIterator(
new ArrayIterator($array),
fn ($value) => $value * 2
);
foreach ($iterator as $value) {
echo $value; // Outputs: 2, 4, 6, 8, 10
}
Properties
Methods
Initializes the ClosureIteratorIterator.
Counts the number of elements exposed by the inner iterator.
Returns the current transformed element.
Initializes the ClosureIteratorIterator.
public
__construct(
iterable<string|int, mixed>
$iterator, Closure
$closure) : mixed
Parameters
$iterator
:
iterable<string|int, mixed>
Description
the underlying iterator to wrap
$closure
:
Closure
Description
the transformation function applied to each element
Counts the number of elements exposed by the inner iterator.
public
count() : int
Description
If the inner iterator implements Countable, this method SHALL return the value provided by that implementation. Otherwise, it MUST count elements by iterating over the iterator. If the inner iterator is not cloneable, this method SHALL wrap the current object in an IteratorIterator instance and count through that wrapper to avoid performing an invalid clone operation. If the inner iterator is cloneable, this method SHOULD count over a clone so that the original iterator state is preserved as much as possible.
Return values
Description
the total number of elements available from the inner iterator
Returns the current transformed element.
public
current() : mixed
Description
The closure is applied to the original current element of the iterator.
Return values
Description
the transformed element