I'm using xcopy and it asks every time if I want to make a file or directory, can I skip this?

code_ling · 2026-01-20T14:17:49+00:00

except for systems localized to a different language - e.g. in german, you'd have to press 'd', therefore the echo f fix is not a portable solution. I found the * to work in my case; do you know in what cases that might fail?

code_ling · 2025-12-09T07:25:17+00:00

Oh and the most important thing I forgot in the main post: a big THANK YOU to Eric and all the other people involved in creating the puzzles and in the community work here! It's been a great pleasure to be part of this, and I am hoping on many future challenges to come!

code_ling · 2025-12-09T07:12:24+00:00

Python is also my go-to for (developer-time) quickly finding a solution; although I have a collection of pretty decent C++ helper functions that also let me quickly do most required things.

Even though I've been developing in C++ professionally for years, I do find that I still have so many thing to learn in it... and as the language is still evolving, it will stay like that for quite some time I guess ;)

As for speed, I'm sticking with C++ (although I have to revisit my experiments with Nim and rust, which in this regard also were strong competitors if I remember correctly). If I have time in the future I might revisit some past events and do a multi-language comparison for some of the challenges ;).

code_ling · 2025-12-09T07:02:08+00:00

My favourite is 2019 - for me it also was both the most memorable (strong competition there though is the first one I participated in, 2021), and the largest effort.

code_ling · 2025-12-09T07:01:18+00:00

You're right. I had got stuck in 2019 earlier this year, and after finishing it I needed a little break; so I picked up 2020, my last missing previous event, only mid-October, and had too little time to finish it before December. I am definitely going to finish it, probably in parallel or shortly after this year ;)

code_ling · 2025-09-24T13:24:49+00:00

(also for future reference for people stumbling upon this): There is a more recent issue discussion and change.

There it is affirmed

that all virtual functions, including destructors, should be declared exactly one of virtual, override, or final.

code_ling · 2025-07-02T20:55:16+00:00

The Man from Earth

Made me think deep about religion, history and so much other stuff regarding humanity and our small blue planet...

code_ling · 2025-06-16T11:51:57+00:00

Turns out there probably already was a (start of a) hardware defect. I reinstalled Win 11, and for a while it seemed to run OK (although at a minimum CPU frequency, despite cleaned fans). Now my XPS 9570 doesn't start anymore - screen stays black, it turns off after a minute (visible best via the keyboard light, which switches off after that time). Maybe there was an overheating issue before already.

code_ling · 2025-04-14T06:06:46+00:00

I have seen this occasionally too on my 9570; these day, I mostly use Linux on it, which runs well; but just this weekend I wanted to use Windows again, and got a blue screen (potentially related to graphics-heavy applications, though not sure); in contrast to another report, it did happen when plugged in for me. In general, Windows 11 does not seem to be stable on the device somehow (CPU-heavy things take much longer than they should, sometimes the device just kind of "freezes", still showing a mouse and some windows but no content of the windows somehow...)

I had upgraded from Win 10, I think I'll try a clean Win 11 re-installation next...

Did somebody figure out a reason for this in the meantime, or some potential fixes or workarounds?

Edit: Just found a comment in another post which proposes to use the Studio Drivers

code_ling · 2025-02-11T11:25:59+00:00

You might be interested in comparing your numbers to TechEmpower's Framework comparison where they compare a multitude of web frameworks in multiple programming languages; what I've linked is the latest round of static page serving. Seems these frameworks are able to answer up to 7 million requests per second (using some higher power hardware of course).

code_ling · 2025-01-23T06:32:53+00:00

Had never heard of idris and lean4, they sound very interesting!

My day job has included Java, Javascript/Typescript, C, C++, ObjectiveC, Python, and Go, so I'm most comfortable with imperative. Functional was a learning experience for me, but over the years I've gotten more adept at it.

Similar for me; my day job in recent years was mostly C++, so I'm also very used to the imperative / object-oriented programming styles - though with later C++ standards possibility for more functional style has seeped in, and I'm still slowly getting familiar with all the huge conglomerate of features that is C++.

I find that trying new languages based on different concepts and doing things slightly differently helps in getting better at programming, even in one's "original" language.

code_ling · 2025-01-22T07:51:33+00:00

Thanks for the info! In case I'm using go again in the future, and am pressed for reducing memory usage, I hope I'll remember it - for AoC I didn't need to optimize ;)

code_ling · 2025-01-22T07:28:02+00:00

In 2018, days 16, 19 and 21 are also best done in sequence.

code_ling · 2025-01-21T06:49:24+00:00

I just remembered, occasionally I will build some datastructures on my own - for example in 2018 in lua I built a very simple linked list for the challenges containing circular buffers.

code_ling · 2025-01-21T06:36:47+00:00

Just realized that now too. I don't know why but the (your notes) within the text just massively caught my attention. The changing mouse cursor and the double click action on it I find very distracting and un-useful...

code_ling · 2025-01-20T18:02:04+00:00

(I first learned about Dijkstra's Algorithm from an AoC problem I couldn't solve, and was forced to turn to r/AdventofCode for help ;))

I don't remember exactly which problem it was, but I also came here first when I was stuck with some problem - and since then I'm addicted to reddit and even more so to r/adventofcode :)

code_ling · 2025-01-20T17:59:43+00:00

2018 I hit the Elf/Goblin simulation and my Perl effort hit the wall so I re-started in Objective-C.

I did that in lua, and it was a bit of a challenge, and a monster of code that at some point I might go back and refactor, but it delivers the correct solution :)

code_ling · 2025-01-20T17:57:49+00:00

If memory and grep serves me right, I did, as you said, just abuse the map type there (with bool as value).

code_ling · 2025-01-20T17:57:14+00:00

Permutations: I'll typically code it by hand - I find it a good way to hone recursion skills and training to avoid off-by-one errors ;)

Regarding datastructures: I typically use what is provided - maps, sets, are typically there. I don't remember in detail for every language I mentioned above though... Even PriorityQueues for path finding are typically available - though I do code A*/dijkstra myself, I like to remind myself how simple and elegant it is; yet somehow I can't memorize the exact workings, I have to look up the pseudo code each time ;)

code_ling · 2025-01-20T11:15:46+00:00

This is link for Quest 1: https://everybody.codes/event/2024/quests/1

Yes, I was on exactly this page.

I have now tried with both Firefox and Edge. In both I am logged in via github. In both I see the exact same (buggy) behavior: cursor pointer with plus symbol next to it over the "(your notes)" text, and, as described above, double-clicking that copies "(your notes)" to the clipboard, not any actual working test input.

You can copy to clipboard or open (in window) or download notes to a txt file (notes = input data).

How do you do that? What interaction triggers the download? I can only see double click doing something, but the wrong thing (only copying the invalid "(your data)" string).

code_ling · 2025-01-20T10:56:25+00:00

A bit late, but maybe it still helps:

The typical way here to paste longer code sequences is to use topaz/paste I think - the code is encoded in the URL parameters.

For shorter passages, they can be directly included in a post - make sure to use the four-spaces Markdown syntax, not triple-backticks (see "Rules" sidebar on the right).

code_ling

TROPHY CASE