https://github.com/typelevel/monoids

Generic Monoids for Scala
https://github.com/typelevel/monoids

Last synced: 8 months ago
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Generic Monoids for Scala

• Host: GitHub
• URL: https://github.com/typelevel/monoids
• Owner: typelevel
• License: mit
• Created: 2018-11-19T22:56:29.000Z (over 7 years ago)
• Default Branch: main
• Last Pushed: 2025-07-06T06:35:01.000Z (9 months ago)
• Last Synced: 2025-07-21T18:52:08.426Z (8 months ago)
• Language: Scala
• Homepage: https://typelevel.org/monoids/
• Size: 1.49 MB
• Stars: 52
• Watchers: 6
• Forks: 11
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

          
# monoids ![Continuous Integration](https://github.com/typelevel/monoids/workflows/Continuous%20Integration/badge.svg) [![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.typelevel/monoids_2.13/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.typelevel/monoids_2.13)

Monoids is a library of a set of generic `Monoid` and `Semigroup` types that are very useful for abstract programming.

This library exposes some generic `Monoid`s:

- `All` - Boolean newtype that combines values using `&&`

- `Any` - Boolean newtype that combines values using `||`

- `Dual` - Inverts the Combine operation of a monoid

- `First` - Option newtype that combine takes the first element that is present

- `Last` - Option newtype that combine takes the last element that is present

- `Product` - Numeric newtype that combines values using Multiplication

- `Sum` - Numeric newtype that combines values using Addition

Also some generic `Semigroup`s:

- `Dual` inverts the combine operation.

- `Max` exposes a Max that given an `Order` will return the maximum value.

- `Min` exposes a Min that given an `Order` will return the minimum value.

## [Head on over to the Microsite](https://typelevel.org/monoids/)

## Quick Start

To use this project in an existing SBT project with Scala 2.12 or a later version, add the following dependencies to your

`build.sbt` depending on your needs:

```scala

libraryDependencies ++= Seq(

  "org.typelevel" %%% "monoids" % ""

)

```