OptionCombine<T> extension

Combining Option values, and moving between Option and Result.

final both = const Some<int>(1).zip(const Some<String>('a')); // Some((1, a))
final checked = const None<int>().okOr('missing'); // Err(missing)

on

Methods

okOr<E>(E error) → Result<T, E>: Available on Option<T>, provided by the OptionCombine extension
Returns Ok with a present value, or Err with error when absent.
okOrElse<E>(E error()) → Result<T, E>: Available on Option<T>, provided by the OptionCombine extension
Returns Ok with a present value, or computes an Err when absent.
zip<U>(Option<U> other) → Option<(T, U)>: Available on Option<T>, provided by the OptionCombine extension
Pairs this value with other's, when both are present.
zipWith<U, R>(Option<U> other, R combine(T left, U right)) → Option<R>: Available on Option<T>, provided by the OptionCombine extension
Combines this value with other's, when both are present.