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Top 23 Scala Cat Projects
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http4s is a Typelevel project, and therefore falls into the "program in Scala as if it were Haskell" category. Many people find this off-putting, but honestly, I think with the resources listed above, this is the option at the best intersection of "mature" and "well-documented" available in Scala. The reason it's off-putting to many people is that Haskell-style pure FP isn't mainstream, so it isn't so much a matter of learning a new technology as it is a matter of learning a new paradigm, which necessarily means surfacing and unlearning things you already know, and perhaps confronting the uncomfortable feeling that things you thought were "fundamental," "have to be that way," aren't, and don't. I personally found this process liberating. But not everyone does.
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Project mention: Ask HN: What are some of the most elegant codebases in your favorite language? | news.ycombinator.com | 2023-06-17
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Hello, you can try to look for pet store implementations on GitHub using Scala, like https://github.com/pauljamescleary/scala-pet-store. The "Pet Store" is usually an example repo demonstrating how to build a CRUD service. Since Scala is a language capable of expressing multiple design techniques, multiple ways of solving similar problems exist, which is neither good nor bad, just irritating for a beginner.
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Project mention: Ask HN: Why is there no specification for Command Line Interfaces? | news.ycombinator.com | 2023-02-27
What's the use case? I was thinking about this exact issue because my product ships several CLI tools, but I wasn't convinced it would be worth the effort.
An OpenAPI specification describes an HTTP interface, and I see it as useful because it makes it easier to write code in language-of-choice to generate HTTP requests (by generating client libraries from the OpenAPI spec).
For a CLI, the interface is the command-line. Usually people type these commands, or they end up in bash scripts, or sometimes they get called from programming language of choice by shelling out to the CLI. So I could see a use case for a CLI spec, which would make it easier to generate client libraries (which would shell out to the CLI)... but it seems a little niche.
Or maybe, as input to a documentation tool (like Swagger docs). I would imagine if you're using a CLI library like Python's Click, most of that data is already there. Click Parameters documentation: https://click.palletsprojects.com/en/8.1.x/parameters/
Or maybe, you could start from the spec and then generate code which enforces it. So any changes pass through the spec, which would make it easy to write code (server and client-side) / documentation / changelogs. Some projects like this: Guardrail (Scala) https://github.com/guardrail-dev/guardrail , and Connexion (Python) https://github.com/spec-first/connexion .
But without this ecosystem of tooling, documenting your CLI in a specification didn't really seem worth the effort. Of course, that's a bootstrapping problem.
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pfps-shopping-cart
:shopping_cart: The Shopping Cart application developed in the book "Practical FP in Scala: A hands-on approach"
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Not related to another scala lib called mouse? https://github.com/typelevel/mouse
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Project mention: "A New Library For Imperative ZIO Programming" by Alexander Ioffe at Functional Scala 2022 | /r/scala | 2023-01-10
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pfps-examples
:izakaya_lantern: Standalone examples shown in the book "Practical FP in Scala: A hands-on approach"
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
The latest post mention was on 2023-11-01.
Scala Cats related posts
- Mouse 0.4.2 - Early release
- How to get started?
- Any recommended design pattern resources?
- Hey, I am new to coding/programming I wanna Learn Scala to get a job. But I have no experience. I know a little bit of Python, Swift and HTML. Can you guys guide me from where to start to my journey to Learn Scala? Also which to Learn Scala 2 or Scala 3
- Any recommended resources for me to learn functional programming in Scala?
- Already learned Scala syntax. Should the next book be "SICP" or "Function Programming in Scala"?
- "A New Library For Imperative ZIO Programming" by Alexander Ioffe at Functional Scala 2022
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A note from our sponsor - InfluxDB
www.influxdata.com | 8 Dec 2023
Index
What are some of the best open-source Cat projects in Scala? This list will help you:
| Project | Stars | |
|---|---|---|
| 1 | Scala Exercises | 2,608 |
| 2 | Http4s | 2,470 |
| 3 | Monix | 1,913 |
| 4 | Monocle | 1,616 |
| 5 | skunk | 1,505 |
| 6 | sttp | 1,393 |
| 7 | scala-pet-store | 1,047 |
| 8 | guardrail | 506 |
| 9 | pfps-shopping-cart | 495 |
| 10 | mouse | 344 |
| 11 | Mockito Scala | 332 |
| 12 | natchez | 310 |
| 13 | cats-mtl | 302 |
| 14 | monadless | 271 |
| 15 | Pulsar4s | 218 |
| 16 | Iteratee | 184 |
| 17 | pfps-examples | 182 |
| 18 | cats-effect-testing | 171 |
| 19 | meow-mtl | 163 |
| 20 | Octopus | 150 |
| 21 | Scala Test-State | 138 |
| 22 | mongo4cats | 84 |
| 23 | graalnative4s | 62 |
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