Callgebra

The little algebra of callbacks.

Introduction

This package exports functions for composing callbacks. You can read about the idea in my Medium post about composable callbacks.

Usage

$ npm install callgebra

const {chain} = require ('callgebra')

import {chain} from 'callgebra/index.js'

API

type Callback a b = (b -> a) -> a

of :: a -⁠> Callback b a

Creates a callback for a given return value.

chain :: (a -⁠> Callback c b) -⁠> Callback c a -⁠> Callback c b

Sequence two callback-accepting functions.

map :: (a -⁠> b) -⁠> Callback c a -⁠> Callback c b

Modify the return value of a callback.

ap :: Callback c (a -⁠> b) -⁠> Callback c a -⁠> Callback c b

Apply the function returned by one callback to the value returned by another.

callback :: (a -⁠> b) -⁠> Callback b a -⁠> b

Given a function and a Callback, runs the Callback using the function.