TS-Maybe

An option type Maybe<Just|Nothing> in TypeScript

Why Maybe ?

• https://oliverjash.me/2017/04/10/why-use-a-maybe-type-in-javascript

What is a Maybe?

• Maybe<Just|Nothing> provides safe handling of null|undefined or any value
• A Maybe implements Pointed Functor, an Applicative, and Monad interfaces
• Also known as a nullable type as Option<Some|None>

Interfaces and Maybe type inspired by:

• Maybe-not https://github.com/danielchappell/maybe-not
• True Myth https://true-myth.js.org

Functional programming resources:

• https://github.com/hemanth/functional-programming-jargon
• https://drboolean.gitbooks.io/mostly-adequate-guide/content/
• http://adit.io/posts/2013-04-17-functors,_applicatives,_and_monads_in_pictures.html

Development

Use LTS version of Node.js

• Download and install for your operating system
• Perhaps use Node Version Manager
  • nvm install --lts

Clone the repo then, within the project root, run:

• npm install

Testing

This boilerplate setup uses TypeScript and Tape as a test runner.

Use node scripts in package.json file

• Check syntax npm run lint
• Run tests npm run test
• Watch changes and run tests npm run watch