Eitherly

Overview

Helpful type classes for TypeScript
This package was formerly named 'type-class'

Install

``
npm install type-class
`

`typescript
import { AsyncResult, tryAsyncResult } from "../src/index";

const goodQuestion = 'The Answer to the Ultimate Question of Life, the Universe, and Everything?'
const badQuestion = 'What is that?'

async function impureAnswer(question: string): Promise {
if(question === goodQuestion)
return 42
throw 'Wrong question'
}

function pureAnswer(question: string): AsyncResult {
return tryAsyncResult(() => impureAnswer(question))
}

pureAnswer(goodQuestion)
.map(console.log) // 42
.mapL(console.error)
.run()
pureAnswer(badQuestion)
.map(console.log)
.mapL(console.error) // Wrong question
.run()

`

Examples

Dummy Application using only AsyncResult (i.e. AsyncEither`) example

Either example

AsyncEither example