FP utilities for authoring common JS programs in functional form.
This package is ESM-only.
Install in Node 12+ with npm:
npm install uinix-fpimport {...} from 'https://esm.sh/uinix-fp';Install in browsers with esm.sh:
<script type="module">
import {...} from 'https://esm.sh/uinix-fp';
</script>You may also install specific packages individually.
npm install uinix-fp-i
npm install uinix-fp-map
npm install uinix-fp-noop
npm install uinix-fp-pipe
...Note: uinix-fp is tree-shakeable and we recommend simply installing the main package if your build supports tree shaking.
The following example shows usage of some uinix-fp programs supporting pointfree and currying ways to express common JS data transformations in a pipeline.
import {
filter,
isTruthy,
map,
pipe,
props
} from 'uinix-fp';
const greet = x => 'Hi ' + x;
const exclaim = x => x + '!';
const filterTruthy = filter(isTruthy); // curried
const data = [
null,
{user: {firstName: 'Jesse'}},
null,
{user: {firstName: 'Walter'}},
...
];
const pipeline = pipe([
filterTruthy, // [{user: {firstName: 'Jesse'}}, {user: {firstName: 'Walter'}}, ...]
map(props('user.firstName')), // ['Jesse', 'Walter', ...]
map(greet), // ['Hi Jesse', 'Hi Walter', ...]
map(exclaim), // ['Hi Jesse!', 'Hi Walter!', ...]
])(data);uinix-fp is unopinionated and you you can express your code appropriately for your functional style and needs. The following pipeline is equivalent to the previous pipeline.
const shoutFirstName = pipe([
props('user.firstName'),
greet,
exclaim,
]);
const pipeline = pipe([
filterTruthy,
map(shoutFirstName),
])(data)uinix-fp exports the following identifiers:
There are no default exports.
APIs are explorable via JSDoc-based Typescript typings accompanying the source code.
uinix-fp is fundamentally just a simple JS library of utilities. It aims to be JS-first and avoid opinionated domain-specific APIs.
uinix-fp programs follow the Unix philosophy, with each program maintaining simple and clear responsibilities, while remaining interoperable with other program and most importantly with core JS.
Strict formalization of FP principles and typings should not impede on the primary goal of providing a minimal set of utilities to help express common JS programs in functional form. If you are looking for a formal and rigorous set of FP utilities, please explore other libraries such as sanctuary and fp-ts.
uinix-fp ships with Typescript declarations, compiled and emitted when installed. The source code is pure Javascript.
uinix-fp adheres to semver starting at 1.0.0.
Note: uinix-fp is a JS-first project. Typescript types are provided as a supplementary convenience for the TS community. Changes in typings will always be treated as semver fixes.
uinix-fp is a collection of smaller FP utilities managed under a monorepo of packages.
Install dependencies with npm i and run tests with npm test. You can also run other NPM scripts (e.g. lint) from the root of the monorepo.