firstWhere method Null safety

  1. @override
E firstWhere(
  1. bool test(
    1. E element
    ),
  2. {E orElse(
      )?}
    )
    override

    Returns the first element that satisfies the given predicate test.

    Iterates through elements and returns the first to satisfy test.

    Example:

    final numbers = <int>[1, 2, 3, 5, 6, 7];
    var result = numbers.firstWhere((element) => element < 5); // 1
    result = numbers.firstWhere((element) => element > 5); // 6
    result =
        numbers.firstWhere((element) => element > 10, orElse: () => -1); // -1
    

    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

    @override
    E firstWhere(bool Function(E element) test, {E Function()? orElse}) =>
        _wrappedList.firstWhere(test, orElse: orElse);