Newest Questions
77,759 questions
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Return breakdown of component from database into its constituent materials; correctly handle recursive scenarios
I’m working with a MySQL database that models product compositions and raw materials. There are two relevant tables with columns as shown:
product_recipes:
...
- 101
3
votes
2
answers
51
views
-1
votes
0
answers
52
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Backend E-Commerce API using Laravel
I want to know if I am ready to apply for a JR Laravel Backend Developer Role, and if my code meets the expectations for a JR or maybe even a Mid-Level Role. My Project isn't done fully: I am planning ...
- 1
4
votes
2
answers
219
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Strength of a Pyramid Top
I need to solve the following competitive programming problem from coderun.ru:
Strength of a Pyramid Top
The pyramid consists of n horizontal layers of blocks: the first layer contains n blocks, the ...
- 41
0
votes
0
answers
19
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CodeView Custom JavaFX Node
I created this to learn about creating custom controls using Region. I did not do any testing of the Control, and it is limited to displaying Java only. I didn't need this for any reason other than ...
- 239
3
votes
1
answer
111
views
Reassignable reference_wrapper with empty state
I created a simple custom refernce_wrapper class template, which, in contrast to std::reference_wrapper, has some additional ...
- 133
1
vote
0
answers
19
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ReadWrite Lock compatible with coroutines
A while ago I wrote for my own needs a (non-reentrant) read-write lock for kotlin's coroutines. I got no reactions on the relevant github thread. I think it's a nice code, so I thought I'd share it ...
- 111
5
votes
2
answers
761
views
Project Euler #909: L-Expressions I
I am trying to solve the 909th challenge of Project Euler. It is basically about replacing specific patterns in a string until no pattern is found. A given string like ...
- 299
9
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3
answers
1k
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C++17: shared_mutex protected DNS cache (rare writes, many reads) return-by-value vs decltype(auto)?
I’d appreciate a review of this small DNS cache.
It stores pairs of domain and IP address
and uses a std::shared_mutex because reads are frequent and writes are ...
- 369
5
votes
1
answer
268
views
PathFinding.java: The grid view and model
Motivation
I am really fond of qiao/PathFinding.js, and, so, I decided to start to do something similar (PathFinding.java). Also, this time, I am wishing to practice some MVC-patterns. It would seem ...
- 31.3k
8
votes
2
answers
530
views
Own HTTP server implementation in Java with a simple template engine
I would like to hear what you think about my simple HTTP Server implementation with a template engine in Java.
Have I overlooked any "pitfalls or caveats", or is there anything else to note?
...
- 936
6
votes
1
answer
265
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Splitting a long introduction into collapsible elements easier to read and translate
Before I started, we had a few long introductory texts that were shown to users in different part of the editor window, depending on what type of object they are editing. The texts describe how to add ...
- 157
3
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0
answers
52
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lanczos_resample Template Function Implementation for Image in C++
This is a follow-up question for Two dimensional bicubic interpolation implementation in C++. I am trying to implement Lanczos resampling for 2D image in this post.
The experimental implementation
<...
- 7,224
-3
votes
0
answers
47
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Role-based Access Control Class code [closed]
I want to know if the sequencing of my code acknowledges coding conventions, and is easy and maintainable to follow through. Here is my code:
...
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3
votes
1
answer
132
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Java: counting letters FROM A fractal algorithm shows prime number patterning
This example finds all "letter" structures.
letter a = LMLMMM
letter b = LMMMMM
letter c = MMLMMM
letter d = MMMMMM
Symbol L = live = prime candidate number
Symbol M = multiple = composite ...
- 315
-1
votes
2
answers
91
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Feedback on Lazy Dependencies (Autofac) [closed]
This is a pattern I have adopted and have been refining with newer C# language features. The main objective of this pattern is to make unit testing and mocking a simpler process.
When testing a class ...
- 107
10
votes
3
answers
2k
views
A Rubik's Cube game in Python
I implemented this Rubik's Cube game in Python, using Canvas and Context2d for user interaction. This was mainly an exercise in &...
- 281
0
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0
answers
31
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Async Rust UdpServer with Clean-Shutdown (using Tokio)
I'm new to Rust and trying to build an async Server.
The server should receive UDP packets, process them (which will include more network communication), and respond the result to the client.
I had ...
- 191
5
votes
1
answer
292
views
Wordsearch Generator (Tracking Success/Failure)
I'm creating a wordsearch generator that takes a list of words and outputs a 10x10 grid (2D array) of letters. This is roughly how it works:
loop over words
use boolean ...
- 151
4
votes
1
answer
768
views
Using AI agent to solve the N-puzzle
I have just written this code here. The code is about creating a (local LLM based) AI agent to solve the N puzzle. I should stress that I am the one who wrote the code, and I did not use AI to write ...
- 359
1
vote
3
answers
112
views
Is this exception handling missing anything?
This is the code. I'm uncertain about the last block.
...
- 225
2
votes
0
answers
51
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Funny time with DNA: a \$k\$-mer index data structure in Java, Take II
(See the previous and initial iteration.)
Intro
This time, I decided to pack the genomic data such that 4 nucleotide bases are encoded into a single byte. In other words, ...
- 31.3k
6
votes
1
answer
95
views
Player controlled dungeon creation system
I'm making a game with a system inspired by the PSP Game Dungeon Dungeon maker 2 the hidden war: Visual Reference. I have everything set up but I feel there are ways to make the code more simple and ...
4
votes
1
answer
90
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Funny time with DNA: a \$k\$-mer index data structure in Java
(See the next iteration.)
This time I have programmed a simple data structure called \$k\$-mer index. The actual word \$k\$-mer is a synonym of substring of length \$k\$. This data structure is built ...
- 31.3k
5
votes
2
answers
136
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Parsing HTTP headers from &HashMap<String, String> into http::HeaderMap
For context, I'm very new to Rust, and I'm trying to learn the best practices and nuances of it as I go.
I've written this small function that takes a ...
- 890
2
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0
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131
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+50
Namespace-scope try_lock_for / try_lock_until pt. 2
This is my second iteration of implementing try_lock_for/try_lock_until function templates in which I've cherry-picked a bunch ...
- 515
5
votes
1
answer
442
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Java: prime number envelopes FROM A fractal algorithm shows prime number patterning
It implements prime number envelopes (page 3) from my paper: https://zenodo.org/records/16829092
The full working example is on github: https://github.com/cerebrummi/primeenvelopes
"StartFA"...
- 315
3
votes
1
answer
85
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OpenProcessing.org JavaScript program - Building a list of matrices
My openprocessing.org JavaScript code listed below produces the output I want but doesn’t seem very elegant to me especially the “.M” in “matrices[mat].M[row][col]”. Any comments to improve the ...
7
votes
1
answer
388
views
Button Debounce in Verilog
I'm learning FPGA development, and this is my first Verilog module - a button bouncer using a state machine. The code works as I expected it to be, but I would like some feedback on the code itself ...
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10
votes
2
answers
1k
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Java: A fractal algorithm shows prime number patterning
The fully working example finds all primes (theoretically). In real life the FA is constrained by stack size. The theoretical run is important, because it proves that all primes have a deterministic ...
- 315