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https://github.com/2m/adventofcode2020
https://github.com/2m/adventofcode2020
Last synced: 22 days ago
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- Host: GitHub
- URL: https://github.com/2m/adventofcode2020
- Owner: 2m
- Created: 2020-12-02T16:36:18.000Z (almost 4 years ago)
- Default Branch: master
- Last Pushed: 2020-12-19T12:13:54.000Z (almost 4 years ago)
- Last Synced: 2023-03-11T12:57:35.345Z (over 1 year ago)
- Language: Scala
- Size: 111 KB
- Stars: 2
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
This repository contains solutions to various puzzles of the [Advent of Code 2020][aoc2020].
Puzzles are solved with various idioms and libraries from the Scala ecosystem.
[Ammonite][amm] is used to run the code.
It is available from many package managers (e.g. `brew install ammonite-repl`).
When running a puzzle solution (e.g. `amm day2.sc`) dependencies will be downloaded automatically.
[Probably][probably] will register any assertions in the code and will print a summary:
```
┌─────┬────────┬──────────────────────────────────────────────┬───────┬───────┐
│ │ Hash │ Test │ Time │ Debug │
├─────┼────────┼──────────────────────────────────────────────┼───────┼───────┤
│ ✓ │ 71d872 │ valid paswords by the first validation rule │ 0.046 │ │
│ ✓ │ baa61a │ valid paswords by the second validation rule │ 0.001 │ │
└─────┴────────┴──────────────────────────────────────────────┴───────┴───────┘
Passed: 2 Failed: 0 Total: 2
✓ Pass ✗ Fail
? Throws in check ! Throws in body
± Fails sometimes # Suite partially fails
```
List of solutions and Scala idioms/libraries used:
| Puzzle | Idioms and libraries |
| ------------------ | ---------------------------------------------------------------------- |
| [Day 1](day1.sc) | [Ammonite Ops][amm-ops], set operations |
| [Day 2](day2.sc) | [Regex pattern matching][regex] |
| [Day 3](day3.sc) | [For Comprehensions][for] |
| [Day 4](day4.sc) | [Akka Streams][akka-streams], [Match on interpolator][match-interp] |
| [Day 5](day5.sc) | [Parsing text to integers][parse-int] |
| [Day 6](day6.sc) | [fs2][], [semigroup][] |
| [Day 7](day7.sc) | [scala-graph][] |
| [Day 8](day8.sc) | [var][], [Mutable Collections][mutable-coll] |
| [Day 9](day9.sc) | [Collections Sliding Window, Tails][subsets] |
| [Day 10](day10.sc) | [Collections Sliding Window][subsets] |
| [Day 11](day11.sc) | [Try, Success, Failure][try] |
| [Day 12](day12.sc) | [fs2][], [LazyList][lazy-list] |
| [Day 13](day13.sc) | [minBy][] |
| [Day 14](day14.sc) | [fs2][] |
| [Day 15](day15.sc) | [fs2][] |
| [Day 16](day16.sc) | |
[aoc2020]: https://adventofcode.com/2020
[amm]: https://ammonite.io/
[amm-ops]: https://ammonite.io/#Operations
[probably]: https://github.com/propensive/probably
[regex]: https://www.scala-lang.org/api/2.13.3/scala/util/matching/Regex.html
[for]: https://docs.scala-lang.org/tour/for-comprehensions.html
[akka-streams]: https://doc.akka.io/docs/akka/current/stream/stream-quickstart.html
[match-interp]: https://cucumbersome.net/2020/11/28/four-new-features-of-scala-2-13-releases-that-you-probably-missed/#2130-s-interpolator-on-pattern-matching
[parse-int]: https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Integer.html#parseInt(java.lang.String,int)
[fs2]: https://fs2.io/guide.html
[semigroup]: https://typelevel.org/cats/typeclasses/semigroup.html
[scala-graph]: https://www.scala-graph.org/guides/core-initializing.html
[var]: https://docs.scala-lang.org/overviews/scala-book/two-types-variables.html
[mutable-coll]: https://docs.scala-lang.org/overviews/collections-2.13/concrete-mutable-collection-classes.html
[subsets]: https://alvinalexander.com/scala/how-to-split-sequences-subsets-groupby-partition-scala-cookbook/
[try]: https://docs.scala-lang.org/overviews/scala-book/functional-error-handling.html#trysuccessfailure
[lazy-list]: https://www.scala-lang.org/api/current/scala/collection/immutable/LazyList.html
[minBy]: https://allaboutscala.com/tutorials/chapter-8-beginner-tutorial-using-scala-collection-functions/scala-minby-example/