bjorng
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 join it by following this link and entering the following code:
39276-eeb74f9a
Where Next?
Trending in Challenges
Other Trending Topics
Latest on Elixir Forum
Sponsor Spotlight
Master modern tools, write cleaner code, and tackle real-world challenges with Manning books, videos, and courses. Start building today.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #library
- #deployment
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #elixirconf
- #channels
- #exunit
- #discussion
- #code-sync
- #podcasts
- #javascript
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ecto-query
- #ai
- #elixirconf-us
- #blog-post
- #elixir-ls
- #phoenix_html
- #iex
- #graphql
- #genstage
- #websockets
- #supervisor
- #advent-of-code
- #distillery
- #processes
- #api
- #forms
- #hex
- #security
- #metaprogramming
Our Sponsors
Build Elixir applications with speed and confidence.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Error tracking, logs, uptime, and Just Enough APM. Built for developers.
Elixir, Erlang & BEAM conferences from Code Sync - join us in 2026!
Practical resources that improve the lives of professional developers.
Producing high quality Elixir screencasts since 2017.
The deployment platform built for Elixir: PaaS ease, VPS control.
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"
Showing Posts 1 to 10- Show Best Posts
- Show All (oldest first)
- Show All (newest first)
bjorng
Here is my solution.
sasajuric
This is my take. It’s not super fast (takes about 2 sec on my machine for part 2), but does the job.
The most interesting part to me is instruction execution. I define the instruction mapping, and then have a generic exec function which interprets the instruction, fetching the correct amount of arguments based on the arity.
qhwa
Nice solution based on
Stream, andFunction.info/1I’ve never thought about beforeHere’s my version.
I did the input parsing in compile time so it was a bit faster. I found that in later puzzles the input might take more time to parse (it happened before).
faried
I’m learning Elixir, and didn’t know about
Enum.find; I couldn’t figure out how to do an early return from insidefor noun <- 0..100, verb <- 0..100, do: ..., so I picked a terrible way to do handle it: spawn 10k processes! (I finished reading the Concurrent Programming section of Programming Elixir last night.)What’s interesting is that I read sasajuric’s solution, adapted it, and it seems to run slower (!) than what I have: 175769 microseconds for my part2, 682567 for theirs. Maybe it’s because of all the destructuring? Both solutions in one file.
egze
Here is mine: aoc/lib/aoc/y2019/d2.ex at master · egze/aoc · GitHub
Thanks @NobbZ for the boilerplate.
xfix
I’m learning Elixir currently, and here is my mine: lib/day2.ex · master · Konrad Borowski / advent_of_code_2019 · GitLab
I’m pretty sure it can be improved, but I quite like what I have here.
NobbZ
Finaly I found some time to do it. And a small typo took me half an hour to figure out the problem… I did
for noun <- 0..99, verb <- 0..9 do … end…egze
That’s cool. Didn’t know about
:arrayfrom Erlang.sasajuric
My first guess would be that your solution is faster b/c you’re using spawn, which means you’re leveraging multiple cores. The
Enum.findversion is sequential.egze
How about we get a little private leaderboard for elixirforum going?
Because the public leader board is insane, people solve the challenges in minutes. wtf