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Scala Advent of Code 2021

Scala Center's solutions of Advent of Code.

Website

The Scala Advent of Code website contains:

  • some explanation of our solutions
  • more solutions from the community

Setup

We use Visual Studio Code with Metals to write Scala code, and scala-cli to compile and run it.

You can follow these steps to set up your environement.

How to open in Visual Studio Code

After you clone the repository, open a terminal and run:

$ cd scala-advent-of-code/2021
$ scala-cli setup-ide src
$ code .

code . will open Visual Studio Code and start Metals.

How to run a solution

In a terminal you can run:

$ cd scala-advent-of-code/2021
$ scala-cli . -M day1.part1
Compiling project (Scala 3.2.0, JVM)
Compiled project (Scala 3.2.0, JVM)
The solution is 1559

Or, to run another solution:

$ scala-cli . -M <dayX>.<partX>

By default the solution programs run on our input files which are stored in the input folder. To get your solutions you can change the content of those files in the input folder.

How to run day3

The solution of day 3 is written for the javascript target. You can run it locally, if you have Node.js installed, by adding the --js option:

$ scala-cli . --js -M day3.part1