https://github.com/gianlucaguarini/cumpa

Minimal function composition implementation
https://github.com/gianlucaguarini/cumpa

Last synced: 2 days ago
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Minimal function composition implementation

• Host: GitHub
• URL: https://github.com/gianlucaguarini/cumpa
• Owner: GianlucaGuarini
• License: mit
• Created: 2019-03-30T11:05:20.000Z (over 5 years ago)
• Default Branch: main
• Last Pushed: 2023-07-20T09:55:44.000Z (about 1 year ago)
• Last Synced: 2024-09-19T23:43:03.579Z (14 days ago)
• Language: JavaScript
• Homepage:
• Size: 6.36 MB
• Stars: 3
• Watchers: 3
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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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