Latest #advent-of-code Threads 
AOC 2025 is right around the corner. Last year, my first year, I just started a raw Elixir application and manually created modules for e...
New
This wraps up Advent of Code 2024 for me. Looking back on the puzzles, here are the ones I found to be the hardest:
Day 11: Plutonian P...
New
Anyone have a solution to Part 2 today? Part 1 was straight forward, but I can’t figure out a programatic way to do part 2. I understand ...
New
This was surprisingly easy.
After a quick attempt to use digraph, I implemented by own straightforward algorithm to find the groups. To...
New
Today was a nice break from Day 21. Part 2 is just brute-force, with a bit of optimization tracking what sequences return how many banana...
New
A frustrating one for me. I spent a long time trying to understand why some combinations resulted in fewer presses and struggled to keep ...
New
I think I was clever by precalculating a search area to iterate over:
Part 1 example (5.7ms): 0
Part 1 input (93.0ms): 1417
Part 2 exam...
New
This one was scary at first.
I loved how part one directs you into an obvious optimization, and then part 2 kicks your butt by asking to...
New
This puzzle was a nice break after the difficult Day 17! . advent-of-code-2024/lib/advent_of_code2024/day18.ex at main · ibarakaiev/adven...
New
Gosh this one took me sooo much time.
At first I was trying to iterate each digit independently on the input A number to make digits cha...
New
This Week's Trending
This Month's Trending
This Year's Trending
AOC 2025 is right around the corner. Last year, my first year, I just started a raw Elixir application and manually created modules for e...
New
Last Three Year's Trending
Nobody’s doing Advent of Code this year? :smile:
I might do the first week or so.
For Day 1, first I solved it using regular expression...
New
Here is my solution for day 2 of Advent of Code:
New
Setting this down for the night, as after a quick naive solve for quick part 1 I realize that part 2 is by design computationally expensi...
New
Here is my solution for day 1 of Advent of Code:
defmodule Day01 do
def part1(input) do
all = parse(input)
{first, second} = E...
New
The second part of today’s puzzle is very misleading.
FYI, each of the ghosts has only one possible position that ends with a "Z" on its...
New
I tried to use combinatorial to solve today’s puzzles but failed (my brain burned out :exploding_head:). In the end I just used brute for...
New
Today is a brute-force day: advent-of-code-2024/lib/advent_of_code2024/day6.ex at main · ibarakaiev/advent-of-code-2024 · GitHub
Takes a...
New
I spent 3 hours struggling in part 2, until I noticed a very basic mistake :joy:
Here’s my code:
By the way, the starting position in...
New
Thought I’d kick today’s thread off!
Parsing
Enum rocks, so most of my code was actually in parsing input.
▶ Preprocessing input
Part 1...
New
Here’s my day 3 code
This was quite easy. I was afraid Part 2 would be “un-regex-able” and was preparing for hand crafting automata bu...
New
I said I was on a break, but I took a sneak peak and it looked fun so…
Part 1 completes in half a millisecond with a single pass of the ...
New
Here is my solution for day 4:
New
Today’s problem is really tense. I don’t think I can do it without libgraph.
New
Don’t know why the regex ~r/[\W && [^\.]]/x does not work in Elixir. It works pretty well in Ruby.
Anyway, here is my solution:
New
Everything went smoothly today.
Nothing to change to solve part 2 because I already used memoization for part 1 (it looked like an AoC e...
New
Trending Over Three Years
This topic is about Day 1 of the Advent of Code 2021.
We have a private leaderboard (shared with users of Erlang Forums):
https://adven...
New
Note by the Moderators: This topic is for general discussion about the Advent of Code 2018.
To prevent people from being spoiled about s...
New
In General if the Enum.all? evaluates true that means all the elements in the given collection evaluates true for the given callback func...
New
This topic is about Day 3 of the Advent of Code 2020 .
Thanks to @egze, we have a private leaderboard:
https://adventofcode.com/2020/le...
New
This topic is about Day 7 of the Advent of Code 2020 .
Thanks to @egze, we have a private leaderboard:
https://adventofcode.com/2020/le...
New
Note: This topic is to talk about Day 2 of the Advent of Code 2019 .
There is a private leaderboard for elixirforum members. You can joi...
New
It is that time of the year again: Advent of Code 2022 :christmas_tree:
Day 1
Leaderboard:
New
Hello, guys. I’m back again, but only for the weekends, maybe.
This topic is about Day 13 of the Advent of Code 2020 .
Thanks to @egze,...
New
This topic is about Day 5 of the Advent of Code 2020 .
Thanks to @egze, we have a private leaderboard:
https://adventofcode.com/2020/le...
New
Hi, there :wave:
Today, I felt it was way more challenging! I went through part2 thanks to Agent based memoization (without memoization ...
New
Note: This topic is to talk about Day 1 of the Advent of Code 2019.
New
Note: This topic is to talk about Day 7 of the Advent of Code 2019 .
There is a private leaderboard for elixirforum members. You can joi...
New
Continuation of Advent of Code 2022:christmas_tree:, Day 1:
Day 2!
Leaderboard:
New
This topic is about Day 17 of the Advent of Code 2020 .
Thanks to @egze, we have a private leaderboard:
https://adventofcode.com/2020/l...
New
Note by the Moderators: This topic is to talk about Day 6 of the Advent of Code.
For general discussion about the Advent of Code 2018 an...
New
Latest on Elixir Forum
Get money off!
The Pragmatic Bookshelf
35% off any eBook
Manning Publications
45% off any item
ElixirCasts
10% off for life
The Pragmatic Studio
20% off any course
AppSignal
10% off for 12 months
Honeybadger
10% off for 12 months
Simply use coupon code "devtalk.com" or "elixirforum" at checkout!
Filter by Type:
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #deployment
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #ash-questions
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #channels
- #exunit
- #discussion
- #javascript
- #elixirconf
- #library
- #oban-questions
- #dialyzer
- #docker
- #onsite
- #authentication
- #podcasts
- #full-time-contract
- #umbrella
- #code-sync
- #ecto-query
- #phoenix_html
- #iex
- #graphql
- #genstage
- #elixir-ls
- #nerves-questions
- #podcasts-by-brainlid
- #supervisor
- #websockets
- #distillery
- #advent-of-code
- #blog-post
- #livebook-questions
- #processes
- #forms
- #api
- #metaprogramming
Forums
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Practical resources that improve the lives of professional developers.
Enabling companies to succeed by building software people love.
The deployment platform built for Elixir: PaaS ease, VPS control.
Courses that'll move you from confusion to "Aha, now I get it!"