Match

Typed switch case for flowtype.

How to use

npm install @mizchi/match -S
# or
yarn add @mizchi/match

This includes index.js.flow to give type definition to flow.

API

• match<T, U>(value: T): Match<T, U>
• Matcher
  • .case(v: T): Match<T, U>
  • .if(func: (t: T) => boolean): Match<T, U>
  • .instanceof(klass: typeof Object): Match<T, U>
• .then(next: () => U)
• .end(): ?U
• .default(next: () => U): U

You should finish by .end or .default.

Example

import match from "@mizchi/match";
const v1: string = match(~~(Math.random() * 10))
  .is(0).then(() => "zero")
  .case(i => i > 5).then(() => "over 5")
  .dafault(() => "others");

const v2: ?string = match(~~(Math.random() * 2))
  .is(0).then(() => "zero")
  .end();

license

MIT