Type Alias Option<T>

Option: Some<T> | None

An optional value: either Some or None. Narrow with the present discriminant or the isSome/isNone guards.

Type Parameters

T
The contained value type

Example

function findUser(id: string): Option<User> {
  const user = users.get(id);
  return user === undefined ? none() : some(user);
}

const result = findUser('123');
if (result.present) {
  greet(result.value);
}

Since

0.1.0