https://github.com/stoeffel/compose-function

Function composition
https://github.com/stoeffel/compose-function

Last synced: 8 months ago
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Function composition

• Host: GitHub
• URL: https://github.com/stoeffel/compose-function
• Owner: stoeffel
• License: mit
• Created: 2015-01-04T09:12:28.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2019-11-07T17:21:19.000Z (about 6 years ago)
• Last Synced: 2025-03-31T12:07:18.689Z (8 months ago)
• Language: JavaScript
• Homepage:
• Size: 22.5 KB
• Stars: 56
• Watchers: 4
• Forks: 3
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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• awesome-micro-npm-packages - compose-function - Compose a new function from smaller functions `f(g(x))`. (Modules / Function)
• fucking-awesome-micro-npm-packages - compose-function - Compose a new function from smaller functions `f(g(x))`. (Modules / Function)

README

          
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Compose-Function




  Installation |

  Usage |

  Related |

  License

  



  

  


  logo by Justin Mezzell

  
Compose a new function from smaller functions `f(g(x))`


Installation

------------

`npm install compose-function --save`

Usage

-----

## Basic usage

```js

import compose from 'compose-function';

const composition = compose(sqr, add2); // sqr(add2(x))

composition(2) // => 16

compose(sqr, inc)(2); // => 9

compose(inc, sqr)(2); // => 5

```

## with curry

```js

import compose from 'compose-function';

import { curry, _ } from 'curry-this';

const add = (x, y) => x + y;

// add(6, sqr(add(2, x)))

compose(

  add::curry(6),

  sqr,

  add::curry(2),

);

// map(filter(list, even), sqr)

compose(

  map::curry(_, sqr),

  filter::curry(_, even),

)([1,2,3,4,5,6,7,8]) // => [4, 16, 36, 64]

```

### `::` huh?

If you’re wondering what the `::` thing means, you’d better read this excellent [overview](https://github.com/jussi-kalliokoski/trine/blob/5b735cbfb6b28ae94bac0446d9ecd5ce51fb149b/README.md#why) by [@jussi-kalliokoski](https://github.com/jussi-kalliokoski) or have a look at the [function bind syntax proposal](https://github.com/zenparsing/es-function-bind).

Or checkout the [curry-this docs][ct].

Related

----

* [curry-this][ct]

License

----

MIT © [Christoph Hermann](http://stoeffel.github.io)

[r]: http://ramdajs.com

[ct]: https://github.com/stoeffel/curry-this