v0.4.1

• New methods for Option type (thanks to tim-smart 🎉)
  • flatMapNullable
  • flatMapThrowable

final option = Option.of(10);

option.flatMapNullable((a) => a + 1); /// 👈 `Some(11)`
option.flatMapThrowable((a) => a + 1); /// 👈 `Some(11)`

option.flatMapNullable<int>((a) => null); /// 👈 `None()`
option.flatMapThrowable<int>((a) => throw "fail"); /// 👈 `None()`

• Improved support fromJson for Option type (thanks [again] to tim-smart 🎉)
  • Allow for decoding of non-primitive types (with custom fromJson constructors)

/// `fromJson` on `DateTime` with `Option` type
final now = DateTime.now();
Option<DateTime>.fromJson(now.toIso8601String(), (a) => DateTime.parse(a as String)); /// 👈 `Some(now)`

Option<DateTime>.fromJson("fail", (a) => DateTime.parse(a as String)); /// 👈 `None()`

• New extension methods for Map (thanks [once again] to tim-smart 🎉)
  • extract
  • extractMap

final map = <String, dynamic>{'a': 1, 'b': 2, 'c': 3, 'd': 4};
map.extract<int>('b'); /// 👈 `Some(2)`
map.extract<String>('b'); /// 👈 `None()`, not of type `String` ⚠️

final map = <String, dynamic>{'a': 1};
map.extractMap('a'); /// 👈 `None()`, not a `Map`

final map = <String, dynamic>{'a': {'b': 2} };
map.extractMap('a'); /// 👈 `Some({'b': 2})`

• Option.of and Option.none factories const (thanks to f-person 🎉)

Note: People who have the prefer_const_constructors lint enabled will notice a warning to use const 🤝

• New managing_imports example (thanks to RandalSchwartz 🎉)
• Updated README introduction