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compose-function
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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
Usage
Basic usage
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
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 by @jussi-kalliokoski or have a look at the function bind syntax proposal.
Or checkout the curry-this docs.
Related
License
MIT © Christoph Hermann
Other packages similar to compose-function
lodash
Lodash is a popular utility library that provides a wide range of functions for common programming tasks, including function composition. The `_.flow` and `_.flowRight` methods in Lodash offer similar functionality to `compose` and `pipe` in compose-function.
ramda
Ramda is a functional programming library for JavaScript that emphasizes immutability and side-effect-free functions. It provides `R.compose` and `R.pipe` functions, which are similar to the compose-function package but come with additional functional programming utilities.
redux
Redux is a state management library for JavaScript applications. It includes a `compose` function that is often used to apply multiple middleware functions in a Redux store. While its primary focus is state management, its `compose` function can be used similarly to the compose-function package.
Keywords
FAQs
Compose new functions f(g(x))
The npm package compose-function receives a total of 685,514 weekly downloads. As such, compose-function popularity was classified as popular.
We found that compose-function demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Package last updated on 04 Oct 2015
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