Monocly vs Monocle

Monocly

Optics experimentation for Dotty (by optics-dev)

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Monocle

Optics library for Scala (by optics-dev)

Extensions Scala Functional programming Optics Lens Typelevel Cats

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optics.dev

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Monocly		Monocle
	Project
1	Mentions	5
32	Stars	1,629
-	Growth	0.1%
1.8	Activity	8.3
over 2 years ago	Latest Commit	6 days ago
Scala	Language	Scala
MIT License	License	MIT License

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

Monocly

Posts with mentions or reviews of Monocly. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-01-21.

Monocle 3 Roadmap
3 projects | /r/scala | 21 Jan 2021

Now, Scala 3 might change that. We will have parametric functions and opaque types, so I think it is worth trying. We have already made experiments in Monocly, a playground repo for Scala 3 optics. I believe Yillin Wei has a fork with a proof of concept of profunctor encoding that supports index and coindex optics.

Monocle

Posts with mentions or reviews of Monocle. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-04-12.

Ref in cats-effect. When should I use it, and when should I not?
1 project | /r/scala | 9 Jul 2022

Without concurrency, using a Ref doesn't buy you anything over just using a var. If you want the benefits of immutability with an API that resembles mutability, you have to use something like Monocle.
Show HN: Monocle – bidirectional code generation library
10 projects | news.ycombinator.com | 12 Apr 2022

A very popular Scala optics library is also called Monocle. I’ve been a happy user for a few years:
https://github.com/optics-dev/Monocle
Monocle 3 release candidate - a super useful and simple library for optics with poetic api
1 project | /r/scala | 1 Jun 2021

See example https://www.optics.dev/Monocle/
Monocle 3.0.0-M1 is released for Scala 2.13 and Scala 3
1 project | /r/scala | 19 Feb 2021
Monocle 3 Roadmap
3 projects | /r/scala | 21 Jan 2021

We always have work to do, for example to define scalfix rules to automate the migration https://github.com/optics-dev/Monocle/issues/1001

What are some alternatives?

When comparing Monocly and Monocle you can also consider the following projects:

tofu - Functional programming toolbox

Quicklens - Modify deeply nested case class fields

Shapeless - Generic programming for Scala

Chimney - Scala library for boilerplate-free, type-safe data transformations

cats - Lightweight, modular, and extensible library for functional programming.

Scalaz - Principled Functional Programming in Scala

Scala Graph - Graph for Scala is intended to provide basic graph functionality seamlessly fitting into the Scala Collection Library. Like the well known members of scala.collection, Graph for Scala is an in-memory graph library aiming at editing and traversing graphs, finding cycles etc. in a user-friendly way.

Scala Blitz - Scala framework for efficient sequential and data-parallel collections -

Each - A macro library that converts native imperative syntax to scalaz's monadic expressions

scribe - The fastest logging library in the world. Built from scratch in Scala and programmatically configurable.

Twitter Util - Wonderful reusable code from Twitter

chronoscala - A JSR-310 port of nscala_time