elixir

Advent of Code in Elixir

Solutions to Advent of Code in Elixir (150⭐):

Day	2015	2016	2017	2018	2019	2020	2021	2022	2023
1	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐
2	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐
3	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐	⭐⭐
4	⭐⭐			⭐⭐			⭐⭐	⭐⭐	⭐⭐
5	⭐⭐			⭐⭐		⭐⭐	⭐⭐	⭐⭐
6	⭐⭐			⭐⭐			⭐⭐	⭐⭐	⭐⭐
7	⭐⭐			⭐⭐			⭐⭐	⭐⭐	⭐⭐
8				⭐⭐			⭐⭐	⭐⭐	⭐⭐
9				⭐⭐			⭐⭐	⭐⭐	⭐⭐
10							⭐⭐	⭐⭐
11							⭐⭐	⭐⭐
12							⭐⭐	⭐⭐
13							⭐⭐	⭐⭐
14							⭐⭐	⭐⭐
15							⭐⭐	⭐⭐
16								⭐⭐
17							⭐⭐	⭐⭐
18							⭐⭐	⭐⭐
19
20
21								⭐⭐
22
23								⭐⭐
24								⭐⭐
25								⭐⭐

Run the Solutions

There are two special Advent of Code mix tasks:

• mix solve 2015 1 solves the given puzzle, in this case Puzzle 1, 2015.
• mix benchmark 2015 1 benchmarks the given puzzle, in this case Puzzle 1, 2015.

You can also run the solutions manually inside a iex -S mix session:

iex> import AOC2015.Day01
iex> AOC.solve("lib/2015/01_not_quite_lisp/input.txt", &parse/1, &part1/1, &part2/1)

Alternatively, you can only read and parse the data, and work with them manually from there:

iex> import AOC2015.Day01
iex> data = AOC.read_text("lib/2015/01_not_quite_lisp/input.txt") |> parse()

Bootstrap a Puzzle Solution

Use copier to invoke the Elixir template and set up files for a new solution:

$ copier path/to/template-aoc-elixir/ .

Answer the questions and allow the hook to download your personal input.

Test a Solution

Each puzzle comes with a test file that can be run with mix test:

$ mix test test/aoc201501_test.exs

You can run all tests by not specifying a particular test file:

$ mix test

This will run all tests except those marked as slow or solution. The solution tests run the full solution and compare the result to the correct solution. You can run them by including them:

$ mix test --include solution

There are also a few other tags you can use:

$ mix test --only solution
$ mix test --only year2015
$ mix test --include solution --exclude year2015

Adding a Solution to GitHub

Follow these steps after solving a puzzle:

1. Store the solution to an output file:

   $ mix solve 2015 1 > lib/2015/01_not_quite_lisp/output.ex.txt

2. Run benchmarks and add them to the README:

   $ mix benchmark 2015 1

3. Update READMEs across all projects:

   $ cd ..
   $ make