v0.4.0

SandroMaglione released this 16 Dec 04:50

· 197 commits to main since this release

201b3d0

Added extension methods to work with nullable types (T?)
- From T? to fpdart's types
  - toOption
  - toEither
  - toTaskOption
  - toIOEither
  - toTaskEither
  - toTaskEitherAsync
  - fromNullable (Either, IOEither, TaskOption TaskEither)
  - fromNullableAsync (TaskEither)
- From fpdart's types to T?
  - toNullable (Either)

/// [Option] <-> `int?`
int? value1 = 10.toOption().map((t) => t + 10).toNullable();

bool? value2 = value1?.isEven;

/// `bool?` -> [Either] -> `int?`
int? value3 = value2
    .toEither(() => "Error")
    .flatMap((a) => a ? right<String, int>(10) : left<String, int>("None"))
    .toNullable();

/// `int?` -> [Option]
Option<int> value4 = (value3?.abs().round()).toOption().flatMap(Option.of);

Added toIOEither to Either
Removed parameter from Either fromNullable [⚠️ BREAKING CHANGE]

final either = Either<String, int>.fromNullable(value, (r) => 'none');

/// 👆 Removed the value `(r)` (it was always null anyway 💁🏼‍♂️) 👇

final either = Either<String, int>.fromNullable(value, () => 'none');

Added chainEither to TaskEither
Added safeCast (Either and Option)
Added safeCastStrict (Either and Option)

int intValue = 10;

/// Unhandled exception: type 'int' is not a subtype of type 'List<int>' in type cast
final waitWhat = intValue as List<int>;
final first = waitWhat.first;

/// Safe 🎯
final wellYeah = Either<String, List<int>>.safeCast(
  intValue,
  (dynamic value) => 'Not a List!',
);
final firstEither = wellYeah.map((list) => list.first);

Added Open API Meteo example (from imperative to functional programming)
Added new articles

Assets 2