monatic v1.0.0-beta

Monatic ·

✨Type-safe and pragmatic Monads for TypeScript ✨

This library has been designed with type safety and usability in mind. You're encouraged to enable strictNullChecks in your TypeScript compiler options to raise null or undefined misuses at compile time. From TypeScript documentation:

In strict null checking mode, the null and undefined values are not in the domain of every type and are only assignable to themselves and any (the one exception being that undefined is also assignable to void).

Install

Install with npm:

$ npm install monatic --save

Install with yarn:

$ yarn add monatic

Option

import { from, Some, None, Option } from "monatic";

const random = (): number | undefined => {
  const value = Math.floor(Math.random() * 100); // generates a random number between [0,100[
  return value % 2 === 0 ? value : undefined;
};

// Will be 10 if random value is undefined, value * 2 otherwise
const x = from(random())
  .map(v => v * 2)
  .getOrElse(10);

Contributing

Scripts

• clean: Remove generated files
• lint:src: Lint src files with ESLint
• lint:test: Lint test files with ESLint
• build:src: Compile src
• build:test: Compile test
• format: Format files with Prettier
• test: Run tests with Jest

License

MIT licensed.