onEach method

Iterable<T> onEach(
  1. void action(
    1. T element
    )
)

Invokes the specified action for each element in the iterable and returns a new lazy iterable that yields the same elements.

This method is useful for performing a side effect (such as printing or logging) for each element in the iterable while maintaining the original order of elements.

  • Parameters:

    • action: The function to be invoked for each element in the iterable.

  • Returns: A new lazy Iterable that yields the same elements as the original iterable, but with the specified action invoked for each element.

  • Example:

    Iterable<int> numbers = [1, 2, 3, 4, 5];
Iterable<int> squaredNumbers = numbers.onEach((element) {
  print('Processing: $element');
}).map((element) => element * element);

Note: This method does not modify the original iterable. It creates a new lazy iterable that applies the specified action to each element and yields the same elements as the original iterable.

Implementation

Iterable<T> onEach(void action(T element)) sync* {
  for (var element in this) {
    action(element);
    yield element;
  }
}