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Björn
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5 years ago | |
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module | 5 years ago | |
LICENSE.md | 5 years ago | |
README.md | 5 years ago | |
index.js | 5 years ago | |
package.json | 5 years ago | |
test.js | 5 years ago |
README.md
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