2m / adventofcode2020

This repository contains solutions to various puzzles of the Advent of Code 2020. Puzzles are solved with various idioms and libraries from the Scala ecosystem.

Ammonite 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 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	Ammonite Ops, set operations
Day 2	Regex pattern matching
Day 3	For Comprehensions
Day 4	Akka Streams, Match on interpolator
Day 5	Parsing text to integers
Day 6	fs2, semigroup
Day 7	scala-graph
Day 8	var, Mutable Collections
Day 9	Collections Sliding Window, Tails
Day 10	Collections Sliding Window
Day 11	Try, Success, Failure
Day 12	fs2, LazyList
Day 13	minBy
Day 14	fs2
Day 15	fs2
Day 16