[![Build Status](https://travis-ci.com/nullobject/fkit.svg?branch=master)](https://travis-ci.com/nullobject/fkit) FKit (pronounced eff-kit) is a [functional programming](http://en.wikipedia.org/wiki/Functional_programming) toolkit for JavaScript. It provides many functions for solving common problems with functions, objects, arrays, and strings. It aims to provide reusable building blocks while maintaining a laser focus on everyday utility. Features: * Why reinvent the wheel? FKit provides many functions for solving everyday problems to do with functions, arrays, objects, and strings. * FKit treats both strings and arrays as *lists*, which means you can apply the same list functions to both strings and arrays (e.g. `head`, `tail`, `map`, `filter`, `fold`, etc). * Most FKit functions are already [curried](http://en.wikipedia.org/wiki/Currying) by default, so you can [partially apply](http://en.wikipedia.org/wiki/Partial_application) them wherever you need to. * The ordering of arguments to FKit functions is carefully designed to be more natural, this makes them highly [composable](http://en.wikipedia.org/wiki/Function_composition). * It's very compact, roughly 3 KB when minified and gzipped! ## Table of Contents * [Getting Started](#getting-started) * [Node](#node) * [Browser](#browser) * [Documentation](#documentation) * [Examples](#examples) * [Licence](#licence) ## Getting Started ### Node Install the npm package: ```sh > npm install fkit ``` Import just the functions you need: ```js import { add } from 'fkit' console.log(add(1, 2)) ``` Or import the whole library: ```js import * as F from 'fkit' console.log(F.add(1, 2)) ``` ### Browser The easiest way to start using FKit in your browser is to include it with a ` ``` ## Documentation * [API documentation](http://fkit.joshbassett.info/) * Presentation by Josh Bassett: [Everyday Functional Programming in JavaScript](https://speakerdeck.com/nullobject/fkit-everyday-functional-programming-in-javascript) * Article by Josh Bassett: [Take Your Code to the Next Level with FKit](http://joshbassett.info/2014/take-your-code-to-the-next-level-with-fkit/) ## Examples Sum the numbers in a list: ```js import { sum } from 'fkit' sum([1, 2, 3]) // 6 ``` Stash a string: ```js import { map, surround } from 'fkit' map(surround('{', '}'), 'hello') // '{h}{e}{l}{l}{o}' ``` Intersperse the numbers in a list with another number: ```js import { intersperse } from 'fkit' intersperse(4, [1, 2, 3]) // [1, 4, 2, 4, 3] ``` Filter the numbers in a list where 1 <= n <= 5: ```js import { between } from 'fkit' [1, 2, 3, 4, 5].filter(between(2, 4)) // [2, 3, 4] ``` Calculate the Cartesian product of two lists: ```js import { cartesian } from 'fkit' cartesian([1, 2], [3, 4]) // [[1, 3], [1, 4], [2, 3], [2, 4]] ``` Calculate the permutations of a list: ```js import { permutations } from 'fkit' permutations('abc') // ['abc', 'bac', 'cba', 'bca', 'cab', 'acb'] ``` Check out some more examples: * [Functions](http://codepen.io/nullobject/pen/dbAkl?editors=001) * [Strings](http://codepen.io/nullobject/pen/hnDEe?editors=001) * [Arrays](http://codepen.io/nullobject/pen/vbcCr?editors=001) * [Objects](http://codepen.io/nullobject/pen/rKszh?editors=001) * [Branching](http://codepen.io/nullobject/pen/LdtDK?editors=001) ## Licence FKit is licensed under the MIT licence. See the [LICENCE](https://github.com/nullobject/fkit/blob/master/LICENCE.md) file for more details.

	Stars	Issues	Version	Updated	Created
fkit	585	2	3.4.1	3 years ago	10 years ago
immer	27,210	40	10.1.1	2 months ago	8 years ago
rambda	1,610	5	9.2.1	7 days ago	7 years ago
ramda	23,647	152	0.30.1	23 days ago	10 years ago
sanctuary			3.1.0	4 years ago	9 years ago
underscore	27,257	52	1.13.6	2 years ago	13 years ago

fkit vs immer vs rambda vs ramda vs sanctuary vs underscore

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