# scala-exercises/scala-exercises

The easy way to learn Scala.

Repository: https://github.com/scala-exercises/scala-exercises
Canonical: https://ross.abutalabs.com/products/scala-exercises
Homepage: https://www.scala-exercises.org
Language: Scala
License: Apache-2.0
License Family: permissive
Topics: scala, learning, cats, shapeless, functional-programming, postgresql
Last push: 2025-09-23T13:18:05+00:00

## Health v2 (maintenance only)
Score: 52/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 43, release rhythm 35, longevity 100
- inputs: {"age_days": 4382, "days_push": 344, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2646, forks 535 (observed 2026-08-28T04:07:06.776312+00:00)

## What it is
Scala Exercises is a web-based platform offering hundreds of interactive exercises for learning Scala and its key libraries such as Cats and Shapeless. Exercises are unit tests completed in the browser with real-time validation, and content is community-editable via pull requests.

## Use cases
- learn scala from scratch
- practice functional programming in scala
- learn the cats library through exercises
- learn shapeless with hands-on problems
- find interactive scala tutorials in the browser
- prepare for scala interviews with coding exercises

## When to choose
- you want hands-on, test-driven Scala practice in the browser
- you are learning functional programming libraries like Cats or Shapeless
- you want curated exercises covering the Scala standard library

## When to avoid
- you need a full structured course with video lectures
- you are looking for a general Scala IDE or build tool
- you want to learn languages other than Scala

## Facets
- artifact type: learning-resource
- maturity: active
- function: developer-tools
- domain: education, programming-languages, tutorials
- platform: jvm
- tags: scala, functional-programming, cats, shapeless, exercises, interactive-learning, web-server

## Member repositories
- scala-exercises/scala-exercises (main) score 52

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:06.776312+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:18:58.637543+00:00, confidence not recorded.
  - readme: https://github.com/scala-exercises/scala-exercises (fetched 2026-08-28T04:07:06.776312+00:00, sha 4484403cde9a)
  - homepage: https://www.scala-exercises.org (fetched 2026-08-29T10:01:49.318933+00:00, sha 118f584f3c36)
- Data as of 2026-08-30T08:39:29.467469+00:00.