monad-t

Transformers for monadic algebraic structures bridging types from various monadic libraries. All transformers are fully fantasy-land compatible. Read this article to fully understand what monad transformers are and how to fully utilize their power of transformation.

Example

const { MonetEitherT: EitherT, FlutureTMonetEither: FutureTEither } = require('monad-t');
const { Future } = require('fluture');
const { Identity, Either, Maybe } = require('monet');


EitherT(Identity.of(1)); //=> Either.Right(1)
EitherT(Either.Right(1)); //=> FlutureTMonetEither(1)
EitherT(Future.of(1)); //=> FlutureTMonetEither(1)
EitherT.of(Maybe.Some(1)); //=> EitherT<Maybe.Some(1)

FutureTEither.of(Future.of(Either.Right(1))); //=> FlutureTMonetEither(1)
FutureTEither(Identity.of(1)); //=> FlutureTMonetEither(1)
FutureTEither(Future.of(1)); //=> FlutureTMonetEither(1)
FutureTEither(Either.Right(1)); //=> FlutureTMonetEither(1)

Optional dependencies

Usually developers use one or two monadic libraries in their projects. For example developer can use monet and fluture in a project and it is not convenient to install all of the optional dependencies of this package (there may be quite a lot in the future). We recommend to use requires from a specific modules of this library so that you won't end up with Cannot find module error when requiring.

const EitherT = require('monad-t/lib/MonetEitherT');
const FutureTEither = require('monad-t/lib/FlutureTMonetEither');


EitherT(Identity.of(1)); //=> Either.Right(1)
EitherT(Either.Right(1)); //=> FlutureTMonetEither(1)
EitherT(Future.of(1)); //=> FlutureTMonetEither(1)
EitherT.of(Maybe.Some(1)); //=> EitherT<Maybe.Some(1)

FutureTEither.of(Future.of(Either.Right(1))); //=> FlutureTMonetEither(1)
FutureTEither(Identity.of(1)); //=> FlutureTMonetEither(1)
FutureTEither(Future.of(1)); //=> FlutureTMonetEither(1)
FutureTEither(Either.Right(1)); //=> FlutureTMonetEither(1)

API Documentation

0.0.1, 0.0.2, 0.0.3, 0.1.0, 0.2.0, 0.2.1, 0.2.2, 0.2.3, 0.3.0, LATEST

Typescript support

Although monad-t is written in ES2016, we support Typescript. When monad-t gets imported into Typescript project, typings are automatically imported and used.

Author

char0n (Vladimir Gorej)

vladimir.gorej@gmail.com

https://www.linkedin.com/in/vladimirgorej/

Contributors

• Michael Kuk
• Michal Svely
• Honza Beseda