https://github.com/gianlucaguarini/cumpa
Minimal function composition implementation
https://github.com/gianlucaguarini/cumpa
Last synced: 3 months ago
JSON representation
Minimal function composition implementation
- Host: GitHub
- URL: https://github.com/gianlucaguarini/cumpa
- Owner: GianlucaGuarini
- License: mit
- Created: 2019-03-30T11:05:20.000Z (over 6 years ago)
- Default Branch: main
- Last Pushed: 2023-07-20T09:55:44.000Z (almost 2 years ago)
- Last Synced: 2025-02-18T07:56:20.321Z (5 months ago)
- Language: JavaScript
- Homepage:
- Size: 6.36 MB
- Stars: 3
- Watchers: 3
- Forks: 0
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# cumpa
Minimal function composition implementation
> `cumpá` in some Italian :it: dialects means `fellow`
[![Build Status][ci-image]][ci-url]
[![NPM version][npm-version-image]][npm-url]
[![NPM downloads][npm-downloads-image]][npm-url]
[![MIT License][license-image]][license-url]
## Usage
```js
import compose from 'cumpa'
const add2 = x => x + 2
const multiplyBy3 = x => x * 3
const add2AndMultiplyBy3 = compose(multiplyBy3, add2)
console.log(add2AndMultiplyBy3(1)) // ((1 + 2) * 3) = 9
```
[ci-image]: https://img.shields.io/github/actions/workflow/status/gianlucaguarini/cumpa/test.yml?style=flat-square
[ci-url]: https://github.com/gianlucaguarini/cumpa/actions
[license-image]: http://img.shields.io/badge/license-MIT-000000.svg?style=flat-square
[license-url]: LICENSE
[npm-version-image]: http://img.shields.io/npm/v/cumpa.svg?style=flat-square
[npm-downloads-image]: http://img.shields.io/npm/dm/cumpa.svg?style=flat-square
[npm-url]: https://npmjs.org/package/cumpa
## API
#### Table of Contents
- [composeRight](#composeright)
- [Parameters](#parameters)
- [compose](#compose)
- [Parameters](#parameters-1)
### composeRight
Similar to compose but performs from left-to-right function composition.
[see also](https://30secondsofcode.org/function#composeright)
#### Parameters
- `fns` **...\[[function](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/function)]** ) - list of unary fynctions
Returns **any** result of the computation
### compose
Performs right-to-left function composition.
Use Array.prototype.reduce() to perform right-to-left function composition.
The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.
[source code](https://30secondsofcode.org/function#compose)
#### Parameters
- `fns` **...\[[function](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/function)]** ) - list of unary fynctions
Returns **any** result of the computation