All Questions
77,258
questions
1
vote
1
answer
99
views
My Drawing Finder
I developed this application for the company I work for. It became increasingly challenging to locate drawings within the myriad of folders, especially when searching for the most up-to-date versions.
...
- 13
3
votes
1
answer
201
views
Project Euler 60: Prime Pair Sets
Project Euler Prime Pair Sets:
The primes 3, 7, 109, and 673 are quite remarkable. By taking any two primes and concatenating them in any order the result will always be prime.
For example, taking 7 ...
- 47
0
votes
0
answers
68
views
C# chess engine performance
I am creating my own bitboard chess engine in C#. I am trying to optimize my make move, unmake move, and move generating functions to get a good fast base. My C# skills are average and got some tips ...
- 109
2
votes
0
answers
33
views
A recursive_fold_right_all Template Function Implementation in C++
This is a follow-up question for A recursive_fold_left_all Template Function Implementation in C++. Besides recursive_fold_left_all function, I am trying to ...
- 3,996
0
votes
1
answer
56
views
Tracking people's check-in and check-out at an event
I have some logic that helps me calculate the data for a summary of an event, which should be rendered as something like this:
...
4
votes
0
answers
21
views
Procedural macro to derive de/serialization trait from/to little endian bytes
I wrote a trait library that allows the de-/serialization of data structures from/to little endian bytes 1.
For it I now wrote my first procedural macro 2 to be able to derive the traits ...
- 106
1
vote
0
answers
33
views
Asp.net Core Razor Pages Complex Databinding Select List to Entity List
I'm new to Razor pages. I would like to bind a <select> list to an object's property that is a list of another object (Report.EventyTypes). Consider the ...
- 111
-1
votes
1
answer
54
views
Handling exceptions of FileInputStream and XSSFWorkbook
Can you tear my code apart with code review comments?
Below is a simple method which reads an XLSX file and does some stuff with it.
I use FileInputStream and ...
- 109
11
votes
4
answers
2k
views
Simple Key Value Database using C
I was recently doing an assignment for a job interview, which asked to create a simple key value database with 4 command line operations:
create key value: Adds a key value pair/updates an existing ...
- 111
4
votes
2
answers
122
views
C++ heap allocator using an explicit free list
Description
I've written a heap allocator in C++ using an explicit free list for organization. I've also written a series of unit tests and a microbenchmark using Catch2. At time of writing I've ...
- 307
-1
votes
1
answer
32
views
1
vote
2
answers
68
views
Configurable 'swapping' order of loops
The code below groups a list by either number or letter, as seen below:
1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B
or
1A, 2A, 3A, 4A, 5A, 1B, 2B, 3B, 4B, 5B
The option is configurable by the user via ...
- 111
3
votes
1
answer
68
views
Multi producer/consumer lock-free queue
I would be grateful if you could review my code for a multi producer/consumer lock-free queue in C++.
I am mainly after performance improvements, but all input is welcome.
...
- 33
3
votes
1
answer
219
views
Find the closest named color
I have a .json file with name (string) and RGB (r, g, b: numbers) with 30.000 key-value pairs. I am looping the json multiple times per second to find the closest name to a given RGB color. Any idea ...
- 31
2
votes
1
answer
81
views
delete rows based on references to other tables in a mysql database?
I have a database with the following hierarchy.
A dataset can have multiple scans (foreign key scan.id_dataset -> dataset.id)
A scan can have multiple labels (<...
- 187
1
vote
2
answers
91
views
Simple service that wraps access to json file
I'm wondering if this is the best way to write the Java code I have written. It works, but looks overly verbose, is it possible to rewrite any of the code to make it more concise? Please ignore the ...
1
vote
2
answers
1k
views
Calling fgets() twice
I am a beginner. I have really struggled with fgets() when using the function twice. I am on Windows with VS Code and C++ extension. My test program is working, but it is IMHO lengthy and complicated ...
- 29
3
votes
1
answer
136
views
Filter: BMP Image Filtering Tool - follow-up
This is a follow-up of this quesiton: Filter: BMP Image Filtering Tool
Changes:
Added comments where necessary.
Added checks for integer overflow.
Added support for input and output redirection.
...
- 2,322
0
votes
1
answer
184
views
How to optimize the player movement code like in Tomb Of The Musk game?
I've written some code that performs movement similar to the Tomb Of The Musk game. The idea is that the objet should move in a certain direction until it encounters an obstacle. After that, the ...
- 3
1
vote
0
answers
38
views
Tkinter threadpool with callback implementation - alternative approach feedback
This is an attempt to create a usable alternative to the "normal" method of implementing concurrency with tkinter. The "normal" method seems to be by pro-actively polling a result ...
1
vote
0
answers
54
views
Sequentially bidirectional find the indexes of an element into a collection (second thought)
Embodying the helpful tips from the “Sequentially find the indexes of an element into a collection” previous code review resulted in extending the implementation to bidirectional index lookup, that is ...
user277722
3
votes
1
answer
142
views
Get HTTP status of many URLs
I'm brand new to using rust, so please bear with me. I'm trying to write a rust program which takes two arguments: A URL, and a wordlist. This wordlist has the following contents, and is several ...
- 33
2
votes
1
answer
53
views
JS animated string builder
Today, I tried to write a simple function that would display the characters of my string one by one by iterating over a string containing the letters of the alphabet and showing the steps on the ...
- 23
3
votes
0
answers
25
views
Topological sort in Prolog
I wanted to calculate topological sort given a few predicates asserting that one element should be before another in a sequence. order(a, b) means that ...
- 131
1
vote
1
answer
52
views
Extending die roll simulations for complex data science tasks
I've developed a Python script that simulates die rolls and analyses the results. I'm now looking to extend and modify this code for more complex data science tasks and simulations.
Is this code ...
- 101
4
votes
2
answers
132
views
Print the three most occurring chars in Java using streams
The three characters that occurs most in a given string should be printed by using streams/lambdas (functional programming). The order of characters that occur equally often should be preserved.
My ...
- 332
7
votes
2
answers
1k
views
Convert 64-bit Gray code to integer
This algorithm encodes a 64 bit integer.
As input I have a 64 bit integer a, for example:
(a is a single 64 bit number,which I split in 8 bytes for readability) <...
- 173
4
votes
2
answers
850
views
Identifying unnecessary attributes in a Python class?
I have commented out two attributes (in random_number_guesser.py) which I believe are unnecessary.
Am I correct in assuming that, because the code runs correctly without their implementation, they ...
3
votes
1
answer
84
views
Sequentially find the indexes of an element into a collection
Util class to find into a collection the indexes of a given element with multiple occurrences from the first index or relative to a given index.
...
user277679
0
votes
1
answer
73
views
Listener for property value changes in a Javascript object
The purpose of this code is add proxy on nested object for log changes on property. This is a debug utility!
...
- 163
10
votes
2
answers
769
views
Leap Year Calculator Using If Elif and Else Only
I'm taking the 100 Days of Code (Python) taught by Angela Yu on Udemy. There have been a few other questions revolving around this lesson but I can't find one who came up with my specific question so ...
- 103
1
vote
0
answers
63
views
binary semaphores implementation pthread
Can someone see if have not made some stupid mistakes in the binary semaphore implementation? I know that some more checks have to be added but I have eventually lost the initial idea in the details.
<...
- 170
2
votes
1
answer
92
views
Simple JS Password System
I created a simple password system using HTML, CSS, and JS to quiz myself on my variable, localstorage, and if and else ...
- 33
0
votes
0
answers
36
views
Mac M1 .BF Compiler in Rust
I'm writing a brainfuck compiler in rust, that takes brainfuck instructions and converts them to a very basic assembly form, and then compiles that into binary, if you are not familiar with brainfuck ...
4
votes
1
answer
135
views
calculate the number of ways to pick two different indices
I'm working on a codesignal practice problem
You are given an array of integers a and an integer k. Your task is to calculate the number of ways to pick two different indices i < j, such that a[i] ...
- 41
2
votes
2
answers
74
views
Merge three (or more) arrays based on specific index and create new array
I have three arrays in which first index is same, so I want to merge all three array into one array based on first index element
Input:
...
- 121
2
votes
5
answers
436
views
Optimisation: Fastest way to multiply every number in an array by 2
I'm trying to find the fastest way to multiply every element in an array by a given number, in this case 2. So far I have written a SIMD instruction that performs at 33 ns multiplying every number in ...
- 108
1
vote
1
answer
84
views
Python Django image upload API with 6 fixed slots
I built an image upload API with Python Django. There are a fixed number of 6 slots, which can either be null or filled with something. There are two entities, Profile, which contains the six photos, ...
- 345
1
vote
0
answers
27
views
Determine top t values with few calls to order(), a given procedure to order k values
Trying to write a decent answer to Most efficient way to get the largest 3 elements of an array using no comparisons but a procedure for ordering 5 elements descendantly, I came up with something ugly....
- 6,104
-1
votes
0
answers
25
views
3
votes
2
answers
112
views
Adhering to Object-Oriented Principles in Fruits and Vegetables Scale Program
I've been working on a project related to a fruit and vegetable scale program for about a month, and I'm relatively new to programming. In this project, I'm trying to adhere to object-oriented ...
2
votes
1
answer
90
views
Codeforces: Dasha & Nightmares
so I got started with competitive programming about a day ago and I got stuck on the first random question I tried on codeforces. It's called Dasha and Nightmares.
Problem Description:
The problem ...
- 73
2
votes
1
answer
276
views
Printing the elements of a forward linked list
I'm a sophomore in computer science who's working on a linked list class for his DSA class. I believe this code can be improved, but I'm not sure how because everything got really messy really fast. ...
- 23
5
votes
1
answer
121
views
RNG Minigame In Python - Best Practices & Possible Improvements?
Recently, I got into programming with Python as a fun little side hobby. After watching a bunch of YouTube tutorials (to learn about IDE's, variables, etc.), I finally got to the point where I was ...
4
votes
1
answer
229
views
200 line Brainfuck Interpreter
I wrote a simple brainfuck interpreter in C99. Coming from a background of C++ made the task easier, but still there is some stuff I had to get used too. The program accepts a path to a brainfuck file ...
0
votes
0
answers
180
views
Value at Risk forecast generator
I am developing a code to compute Value at Risk (VaR) using various models (see below). Currently, I am looking to implement a rolling window approach over a dataset spanning 4,000 days, with each ...
- 1
1
vote
1
answer
50
views
Template for making distinct numeric type aliases
I've tried to make a small template for the creation of distinct (incompatible) numerical types. For example both row and column indices are usually represented as the same underlying type. However it ...
- 77
10
votes
3
answers
2k
views
Cumulative grade-point-average calculator in C++
I wrote a simple Cumulative grade-point-average calculator in C++, and would like to ask for advices to improve the code in terms of best practices (efficiency, reliability) in the language. Here's my ...
- 175
-2
votes
1
answer
65
views
Double set to -1 from function does not equal to -1 in comparison [closed]
I use the function trace() to calculate the trace of a matrix. This is not important. But for this specific matrix this value is -1. My variable "trace" is set to this from the function. ...
2
votes
2
answers
91
views
AES-GCM and AES-CBC-HMAC encryption methods
Looking for code reviews of these two encryption methods. And if GCM is better or worse than CBC with HMAC.
AES-GCM
...
- 31