AdventOfCode2020 VS advent-of-code

Compare AdventOfCode2020 vs advent-of-code and see what are their differences.

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AdventOfCode2020 advent-of-code
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The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of AdventOfCode2020. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2020-12-23.


Posts with mentions or reviews of advent-of-code. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-12-03.
  • -🎄- 2021 Day 4 Solutions -🎄-
    215 projects | | 3 Dec 2021
    As a side note, I took inspiration from a post the other day about adding AoC badges to your repository README file. I use GitLab, which lets you define badges as properties of your repository. So I added badges to my repository's header area, driven by a JSON file in the repository. The JSON file is updated manually by a script. (I might add some automated updates at some point, but manual works okay for now.)
  • -🎄- 2021 Day 2 Solutions -🎄-
    240 projects | | 1 Dec 2021
    Probably overkill, because I parsed the instructions into instances of my point class. I tend to default to that for coordinates nowadays (as opposed to just using complex numbers) because it generically extends to arbitrary numbers of dimensions. Just in case.
  • [2020 Day 20 (part 2)] Video of the Tile Assembly
    1 project | | 26 Dec 2020
    The code is here: It's in Common Lisp. There are quite a few hacks, copied-and-pasted code, and other blemishes. Toward the end, I just wanted to get something done, even if the code didn't turn out pretty.
  • -🎄- 2020 Day 24 Solutions -🎄-
    78 projects | | 23 Dec 2020
    My solution in Common Lisp.
  • -🎄- 2020 Day 23 Solutions -🎄-
    81 projects | | 22 Dec 2020
    For part two, I first tried rewriting my code with a circular list structure I wrote for Advent of Code 2018 day 9 (Marble Mania). I figured the mutable circular list implementation would be more performant. It was, but nowhere near enough.
  • 2020 Day 21 Solutions
    1 project | | 21 Dec 2020
    My solution in Common Lisp.
  • 2020 Day 11 Solutions
    2 projects | | 11 Dec 2020
    For the seats, I stored points in an FSet map. Past Advents of Code have taught me that a dictionary lookup is more flexible than a two-dimensional array (though the 2D array would have sufficed for this problem). I used my own point library; although complex numbers work quite well for 2D points, my library generalizes better to higher dimensions.
    2 projects | | 11 Dec 2020
    My solution in Common Lisp.

What are some alternatives?

When comparing AdventOfCode2020 and advent-of-code you can also consider the following projects:

AdventOfCode.Template - Advent of Code C# (.NET 6) template. Based on AoCHelper (

advent2020 - Advent of Code 2020