https://github.com/phadej/reducemonoid

Reduce with an associative operation
https://github.com/phadej/reducemonoid

Last synced: about 7 hours ago
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Reduce with an associative operation

• Host: GitHub
• URL: https://github.com/phadej/reducemonoid
• Owner: phadej
• Created: 2014-09-16T12:17:09.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2014-09-16T12:34:57.000Z (about 10 years ago)
• Last Synced: 2024-10-11T15:16:43.609Z (27 days ago)
• Language: JavaScript
• Size: 129 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# reducemonoid

> Reduce with an associative operation

[![Build Status](https://secure.travis-ci.org/phadej/reducemonoid.svg?branch=master)](http://travis-ci.org/phadej/reducemonoid)

[![NPM version](https://badge.fury.io/js/reducemonoid.svg)](http://badge.fury.io/js/reducemonoid)

[![Dependency Status](https://david-dm.org/phadej/reducemonoid.svg)](https://david-dm.org/phadej/reducemonoid)

[![devDependency Status](https://david-dm.org/phadej/reducemonoid/dev-status.svg)](https://david-dm.org/phadej/reducemonoid#info=devDependencies)

[![Code Climate](https://img.shields.io/codeclimate/github/phadej/reducemonoid.svg)](https://codeclimate.com/github/phadej/reducemonoid)

## Why

For some reason *reducemonoid* is faster than `reduce` or `reduceRight`:

```

100 elements

reducemonoid x 407 ops/sec ±6.55% (82 runs sampled)

native reduce x 190 ops/sec ±1.02% (90 runs sampled)

native reduceRight x 168 ops/sec ±5.58% (73 runs sampled)

underscore reduce x 162 ops/sec ±6.12% (82 runs sampled)

underscore reduceRight x 164 ops/sec ±7.45% (78 runs sampled)

lodash reduce x 188 ops/sec ±1.45% (89 runs sampled)

lodash reduceRight x 189 ops/sec ±2.72% (90 runs sampled)

Fastest is reducemonoid

```

## API

- `reduceMonoid(arr: Array a, operation: a -> a -> a, unit: a): a`

- `reduceMonoid.reduceSemigroup(arr: NonEmptyArray a, operation: a -> a -> a): a`