IterableSignalImpl<E> class

Implementation of IterableSignal that computes its value from a getter function.

This is the concrete implementation of the IterableSignal interface. IterableSignal extends Computed to provide reactive iterable functionality. The iterable is computed on-demand and cached until dependencies change, making it efficient for expensive iterable operations.

See IterableSignal for the public interface and usage examples.

Example:

final numbers = Signal([1, 2, 3, 4, 5]);

// Create reactive iterable that filters even numbers
final evenNumbers = IterableSignal(() =>
  numbers.value.where((n) => n.isEven)
);

// Use like any iterable
print('Even numbers: ${evenNumbers.toList()}'); // [2, 4]

// React to changes
Effect(() {
  print('Count of even numbers: ${evenNumbers.length}');
});

numbers.value = [1, 2, 3, 4, 5, 6]; // Triggers effect: "Count of even numbers: 3"