https://github.com/javiercejudo/olsen

:dancers: Two of a kind check
https://github.com/javiercejudo/olsen

Last synced: 2 months ago
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:dancers: Two of a kind check

• Host: GitHub
• URL: https://github.com/javiercejudo/olsen
• Owner: javiercejudo
• License: mit
• Created: 2015-08-14T14:17:58.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2017-04-28T23:59:10.000Z (about 8 years ago)
• Last Synced: 2025-02-13T20:31:01.468Z (4 months ago)
• Language: JavaScript
• Homepage: https://www.npmjs.com/package/olsen
• Size: 13.7 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 15
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# olsen

[![Build Status](https://travis-ci.org/javiercejudo/olsen.svg)](https://travis-ci.org/javiercejudo/olsen)

[![Coverage Status](https://coveralls.io/repos/javiercejudo/olsen/badge.svg?branch=master)](https://coveralls.io/r/javiercejudo/olsen?branch=master)

[![Code Climate](https://codeclimate.com/github/javiercejudo/olsen/badges/gpa.svg)](https://codeclimate.com/github/javiercejudo/olsen)

Two of a kind check

## Install

    npm i olsen

## Usage

In general, `olsen(x, y)(func)` ≡ `func(x) === func(y)`.

```js

var olsen = require('olsen');

olsen(1, 3)(isEven); // => true, both of kind "not even"

olsen(2, 4)(isEven); // => true, both of kind "even"

olsen(1, '1')(Number); // => true

olsen(1, 0.99999999999999999)(Number); // => true, 0.999... becomes exactly 1

olsen(1, 0.9999999999999999)(Number); // => false

olsen(0, 2 * Math.PI)(Math.cos); // => true

olsen(NaN, NaN)(function(x) {

  return x;

}); // => false, NaN !== NaN

```

See [use case](fixtures/Address.js) and [accompanying tests](test/useCase.js).