https://github.com/raineorshine/fp-and-or

Simple `and` and `or` functional programming predicates
https://github.com/raineorshine/fp-and-or

fp

Last synced: 7 months ago
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Simple `and` and `or` functional programming predicates

• Host: GitHub
• URL: https://github.com/raineorshine/fp-and-or
• Owner: raineorshine
• License: isc
• Created: 2020-11-11T22:21:57.000Z (almost 5 years ago)
• Default Branch: main
• Last Pushed: 2023-11-05T03:22:08.000Z (almost 2 years ago)
• Last Synced: 2025-03-18T07:51:48.318Z (7 months ago)
• Topics: fp
• Language: JavaScript
• Homepage:
• Size: 712 KB
• Stars: 5
• Watchers: 2
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README-template.md
  • License: LICENSE

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README

          
# fp-and-or

[![npm version](https://img.shields.io/npm/v/fp-and-or.svg)](https://npmjs.org/package/fp-and-or)

Simple `and` and `or` functional programming predicates.

- `and(...fs): (...args): boolean` - Returns a predicate that returns true if **all** arguments are true or evaluate to true for the given input.

- `or(...fs): (...args): boolean` - Returns a predicate that returns true if **at least one** argument is true or evaluates to true for the given input.

A predicate is a function that returns a `boolean`, commonly used in `Array.prototype.filter`.

e.g.

```js

const isEven = n => n%2 === 0

const isPositive = n => n > 0

// un-fancy

items.filter(x => isEven(x) || isPositive(x))

// fancy

items.filter(or(isEven, isPositive))

```

## Install

```sh

npm install --save fp-and-or

```

## Usage

```js

const { and, or } = require('fp-and-or')

<%=usage%>