description

# lastWhere method Null safety

E lastWhere (

1. bool test(
   1. E value
   ),
2. {E orElse(
   )}

)
override

Returns the last element that satisfies the given predicate `test`.

An iterable that can access its elements directly may check its elements in any order (for example a list starts by checking the last element and then moves towards the start of the list). The default implementation iterates elements in iteration order, checks `test(element)` for each, and finally returns that last one that matched.

If no element satisfies `test`, the result of invoking the `orElse` function is returned. If `orElse` is omitted, it defaults to throwing a StateError.

## Implementation

    E lastWhere(bool test(E value), {E Function()? orElse}) {
      late E result;
      bool foundMatching = false;
      for (E element in this) {
        if (test(element)) {
          result = element;
          foundMatching = true;
        }
      }
      if (foundMatching) return result;
      if (orElse != null) return orElse();
      throw IterableElementError.noElement();
    }