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Q&A

Welcome to Software Development on Codidact!

Will you help us build our independent community of developers helping developers? We're small and trying to grow. We welcome questions about all aspects of software development, from design to code to QA and more. Got questions? Got answers? Got code you'd like someone to review? Please join us.

General Q&A about programming, scripting, software design & architecture, process, tools, testing, and more.

Filters (None)
81%
+7 −0
What is the purpose of grouping the tests in a `tests` module and is it possible to split them?

What is the purpose of grouping the tests in a tests module like this #[cfg(test)] mod tests { use super::*; #[test] fn test_function_1() { // test code for function 1 g...

3 answers  ·  posted 1y ago by ShadowsRanger‭  ·  last activity 8mo ago by Moshi‭

33%
+0 −2
How to distinguish between single and multiple file media?

In a media manager I have database tables for files, media and collections. When a user is browsing a collection I want there to be links to see the metadata for single file media like books, movi...

2 answers  ·  posted 1y ago by filosoful‭  ·  last activity 1y ago by r~~‭

55%
+3 −2
How to proportionally convert a number in the range of -1 and 1 to a number in the range of 0 and 319

I have float noise values, between -1 and 1, for every x,y coordinate in a 2D area and I am trying to convert that to a whole number between 0 and 319 which represents a vertical z coordinate to re...

3 answers  ·  posted 1y ago by cuzzo‭  ·  last activity 1y ago by Dirk Herrmann‭

22%
+0 −5
Replit particles push instead of being background [closed]

I am working on a replit https://AppropriateMessyRoutes.ozabramo.repl.co and I am trying to implement https://github.com/VincentGarreau/particles.js as a background but I keeps on pushing every...

1 answer  ·  posted 1y ago by ObviousPlays‭  ·  closed 1y ago by Alexei‭

28%
+0 −3
Built-in way to compute coefficient of variation in pandas

Background The coefficient of variation is: defined as the ratio of the standard deviation to the mean Question Is there a built-in function for this? Tried I know I can do df.std() / df...

1 answer  ·  posted 1y ago by mcp‭  ·  last activity 1y ago by cuzzo‭

81%
+7 −0
Qt Button changes drastically when setting its `border-radius`.

In a Qt application I have nothing more than a window with a button as its direct child. I set its background color and all is fine: Window::Window(QWidget *parent) : QWidget(parent) { but...

1 answer  ·  posted 1y ago by Quasímodo‭  ·  last activity 1y ago by r~~‭

66%
+2 −0
How would I avoid textures being blurred when mapped to a TriangleMesh?

I am making a game using JavaFX and the Fxyz library. I have chunks which are made of Point3D's, these points are then passed to a ScatterMesh and that is used to generate a TriangleMesh so I can m...

0 answers  ·  posted 1y ago by cuzzo‭  ·  edited 1y ago by Alexei‭

30%
+1 −5
Haskell revision question. [closed]

The answer for this question is that there is something wrong with the expression of the first guard of this function below: congratulations :: [(String, Int)] -> [String] congratulations [] =...

0 answers  ·  posted 1y ago by Anonymous‭  ·  closed 1y ago by Alexei‭

22%
+0 −5
How should I deploy my Full Stack Angular Application (MEAN Stack) project on free hosting website? [closed]

How should I deploy my Full Stack Angular Application (MEAN Stack) project on free hosting website? Github I have provided below the github link of the project for the better understanding. Prob...

0 answers  ·  posted 1y ago by mrsilenttradeguy‭  ·  closed 1y ago by Alexei‭

50%
+2 −2
What does this function definition mean in Haskell?

What does this function definition mean in Haskell? fn x [] = [] fn x (True:ys) = x : fn x ys fn x _ = []

1 answer  ·  posted 1y ago by Anonymous‭  ·  last activity 1y ago by r~~‭

66%
+2 −0
How can I upload images or files to strapi using graphQl

How can I upload images or files to strapi using graphQl. I'm using Cloudinary as the image provider. The strapi admin panel works fine, uploads the images to cloudinary. But, when using graphQl m...

0 answers  ·  posted 1y ago by Phtremor‭

75%
+4 −0
How would I fix my IntelliJ IDE? It cannot open and re-installing does not work.

So I was looking around for some async solutions and I found one on github, https://github.com/electronicarts/ea-async I follow the setup instructions for maven. Only to realize it didn't work (I ...

1 answer  ·  posted 1y ago by cuzzo‭  ·  last activity 1y ago by cuzzo‭

33%
+0 −2
Deep linking from another app isn't working for Amazon prime and disney+hotstar

It's not possible to send data to amazon prime and disney+hotstar. I was trying to send user to amazon prime when they click a (video) link (e.g. https://www.amazon.com/gp/video/detail/B01MSPI8JN/r...

1 answer  ·  posted 1y ago by billy‭  ·  last activity 1y ago by billy‭

71%
+3 −0
How do you insert a struct into a hive table column using HiveRunner?

If my struct column has the data type of struct<string, integer> then what should be the equivalent java object that should be inserted into that struct column? I'm trying the following code...

1 answer  ·  posted 1y ago by Abbas Gadhia‭  ·  last activity 1y ago by Abbas Gadhia‭

28%
+0 −3
How would I go about chunk loading around player in a 3 dimensional cartesian coordinate space [closed]

So I am in the process of creating a voxel sandbox survival game (minecraft clone) in javaFX. I am at a point where I need to come up with a way to load the chunks in my surrounding given a render ...

1 answer  ·  posted 1y ago by cuzzo‭  ·  closed 1y ago by cuzzo‭

50%
+1 −1
Why does my code show an error at deriving (eq)? (SOLVED) NEW ERROR: At SimpleEnigma & SteckeredEnigma constructors which I need help on :")

Hi, I'm trying to code an Enigma machine in Haskell which were used by the German in WWII to transmit coded messages. An Enigma Machine consists of 3 rotors which are substitution ciphers and a re...

1 answer  ·  posted 1y ago by Anonymous‭  ·  last activity 1y ago by Alexei‭

42%
+1 −2
Why OFFSET isn't working the way it is expected?

I had three data with where gender=female. I was trying to call those data with limit and offset (Since in future there might be more than 1000 data). SELECT * FROM `users` WHERE `gender`='Female'...

1 answer  ·  posted 1y ago by billy‭  ·  edited 1y ago by Alexei‭

71%
+3 −0
highlight.js 3rd party plugin error: Cannot read properties of undefined

Highlight.js version: 11.6.0 Node version: v18.12.0 npm version: 8.19.12 When I provide a plugin with the following code to highlightjs (full code is at github): /* Language: BQN Requires: A...

1 answer  ·  posted 1y ago by Razetime‭  ·  last activity 1y ago by Razetime‭

66%
+2 −0
Why is IntelliJ not finding these modules?

So to preface I started a new JavaFX project in IntelliJ and all of this is from what was auto-generated out of the box. The modules I'm having trouble with are Edit to make this post more query...

1 answer  ·  posted 1y ago by cuzzo‭  ·  last activity 1y ago by cuzzo‭

20%
+0 −6
how to use one list to find a similar list in another list python

I want a way to make it so that I can use list B to find out if a copy of itself exists in list A. listA = ['1', '1', '0', '1', '0', '1', 'down'] 2 ['0', '0', '1', '1', '1', '1', 'up'] 2 ['1', '...

1 answer  ·  posted 1y ago by Solaranfel1366‭  ·  last activity 9mo ago by Alias Cartellano‭

75%
+7 −1
How can I provide additional information when raising an exception?

Suppose I have some code like: filename = "bad_dir" print(f"File not found: {filename}.") raise(FileNotFoundError) When the exception isn't caught, the stack trace is printed at the end of ...

2 answers  ·  posted 1y ago by mcp‭  ·  edited 2mo ago by Karl Knechtel‭

33%
+0 −2
Where do I get rotatable images of solar system planets? [closed]

What I'm trying to do, because it's to provide a visually exciting set of results for a simulation package, is given a time, show what a planet looks like from a given angle. I've got SPICE and I'...

0 answers  ·  posted 1y ago by Fred Wamsley‭  ·  edited 1y ago by Alexei‭

60%
+1 −0
Datagrid in MVVM saves edits but not inserts

I am writing a todolist application in WPF with MVVM. I display the goals in a datagrid and the editing works fine. Changes made in the grid are saved to the DB when I click save. However, adding a...

1 answer  ·  posted 1y ago by FrankLuke‭  ·  last activity 1y ago by Alexei‭

50%
+0 −0
How to define Polly policies when working with Refit library in ASP.NET Core?

Note: this is based on my question on SO and subsequent activity there I am trying to add resilience using Polly to HTTP calls that are performed using Refit library. I am using the Refit factory...

1 answer  ·  posted 1y ago by Alexei‭  ·  last activity 1y ago by Alexei‭

33%
+0 −2
App crashes/ implementing picture in picture mode to timer

When I tried to emulate the app that I coded in the connected phone, it keeps closing due to crashes, is there any problem with my code? Also, I am trying to make a timer app with picture and pict...

0 answers  ·  posted 1y ago by dkdkjoi‭  ·  edited 1y ago by Alexei‭

25%
+0 −4
how do i fix this code [closed]

this is my build.gradle.app file: plugins { id 'com.android.application' } android { compileNdk flutter.compileNdkVersion compileOptions{ sourceCompatibility Ja...

0 answers  ·  posted 1y ago by LSHpqr‭  ·  closed 1y ago by Alexei‭

60%
+1 −0
How to refer to the same class twice from one Entity Framework entity?

I have two classes, Contestant and Picture, with the following setup: public class Contestant { ... public int AvatarID { get; set; } [ForeignKey(nameof(AvatarID))] public ...

1 answer  ·  posted 1y ago by FrankLuke‭  ·  edited 1y ago by Alexei‭

66%
+2 −0
Using Lua's `os.rename` to rename a file from a hard drive to a new location on a USB flash drive

I'm using the os.rename function in a lua script. It works perfectly fine for renaming files on my hard drive, e.g. os.rename("test.txt","/Users/username/Desktop/test2.txt") will rename the fil...

1 answer  ·  posted 1y ago by samcarter‭  ·  last activity 1y ago by Peter Taylor‭

66%
+2 −0
How do I (compactly) initialize a 2-d array of structs with the same value?

I learned about the ** operator for array-repeat, and I love it. I have a struct that contains a 2-d array of inner structs, like const D1 = 30; const D2 = 40; const Inner = struct { .a: u32, ....

0 answers  ·  posted 1y ago by aghast‭

77%
+5 −0
Any testimonials for any C++ units of measure library?

The question is about libraries that extend the data type system to ensure physically realistic computations. Think std::chrono but for distance and mass and other things as well as for time. Inste...

1 answer  ·  posted 1y ago by Fred Wamsley‭  ·  last activity 1y ago by Ben‭

77%
+5 −0
Child div doesn't inherit parent's div background-color

I have a parent div with two child divs. I want the parent div and the child divs to have a blue background color when it's hovered. But the child divs doesn't inherit the background color. It is o...

1 answer  ·  posted 1y ago by Bennshinpoes‭  ·  last activity 1y ago by r~~‭

42%
+1 −2
How to generate random objects at different locations on x, y, z axis

I have been trying to generate a random object on all three axis in different locations. However, Vector3 doesn't accept that many overloads e.g: Vector3 spawnPos = new Vector3(Random.Range(spawnL...

1 answer  ·  posted 1y ago by simonJN‭  ·  last activity 1y ago by deleted user

70%
+5 −1
C naming convention, module trigrams?

For my company, I'm writing naming conventions for embedded code in C language. Function names must be named in lowerCamelCase() and start with a verb. Global variables are in Maj_started_lowe...

3 answers  ·  posted 1y ago by AdriZ‭  ·  last activity 1y ago by Dirk Herrmann‭

40%
+0 −1
white screen issues but not in USB tethering mode

I am getting a white screen issue for my angular portal, only if I am not using "USB tethering". When I use home/office wifi, and mobile hotspot, I get a white screen when I use USB tethering fro...

0 answers  ·  posted 1y ago by SmartestVEGA‭  ·  edited 1y ago by Ethan‭

60%
+1 −0
org.apache.http.NoHttpResponseException: nginx.apps.cloud.cloud.local:443 failed to respond

Getting the following error only when I call a post API through Nginx [0m[31m12:48:35,903 ERROR [io.acurio.hub.api.rest.impl.DesignsResource] (default task-16) Failed to invoke workflow: com.masha...

0 answers  ·  posted 1y ago by SmartestVEGA‭

71%
+3 −0
Cast uninitialized variable to (void)

Is it undefined behaviour to cast an uninitialized variable to (void)? Example: int main() { int x; (void)x; return 0; }

4 answers  ·  posted 1y ago by Estela‭  ·  last activity 1y ago by Ethan‭

57%
+2 −1
ffmpeg: apply a filter from a start time to the end of the video

I'm using ffmpeg to apply a filter in between two time points. I am using the between() operator to specify the times. For example, to apply the yadif filter between 30 and 90 seconds I run: ffmpe...

1 answer  ·  posted 1y ago by Trevor‭  ·  last activity 1y ago by Trevor‭

44%
+2 −3
When I use the piecewise function I get more columns in the output

I have this code syms t y(t) = t*heaviside(t)*heaviside(1-t); x(t) = piecewise(0<=t<=1,1,t<0,0,t>1,0); l = -2:0.01:2; disp(y(l)); disp(x(l)); and in the output, I ge...

0 answers  ·  posted 1y ago by MissMulan‭  ·  edited 1y ago by Alexei‭

66%
+2 −0
Input date in Angular Material date picker in dd/MM/yyyyy format

I am trying to create an application that takes a date as user input which is then passed as a parameter to an API call. The local date format is dd/MM/yyyy. I want the user to be able to enter t...

1 answer  ·  posted 1y ago by mcalex‭  ·  last activity 1y ago by tmpod‭

81%
+7 −0
Is there any benefit to using new?

I've heard that in modern C++, smart pointers are preferred to raw pointers for ownership (the so-called RAII principle, as I understand it). This makes sense, and since then I've always used them...

1 answer  ·  posted 1y ago by Moshi‭  ·  last activity 1y ago by deleted user

57%
+2 −1
What should I read if I knew C++ twenty years ago? [closed]

For someone who was familiar with C++ in the past and is coming back to it after a long break, what are some useful books that won't waste time with basics but will cover the new features of the mo...

0 answers  ·  posted 1y ago by Fred Wamsley‭  ·  edited 1y ago by Alexei‭

c++
45%
+3 −4
Create a list of Niven numbers in Python

There's this new challenge on Code Golf CD and I'm using Python to do it. A little bit of golfing already took place, so the code might look a bit messy for you. Anyway, I'm proud of what I've writ...

2 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by Dirk Herrmann‭

71%
+3 −0
Why is boolean value f (false) defined as a parsing-word while t (true) is not in Factor?

I noticed when attempting to generate random booleans that t and f are not treated in the same way: t random ! Error f random ! returns a value In the factor 0.98 and 0.99 documentation, t is ...

1 answer  ·  posted 1y ago by Razetime‭  ·  edited 1y ago by Alexei‭

60%
+1 −0
How to get a default value from an assoc in Factor programming language

To get a value from an assoc and provide a default value if the value does not exist, I am using the following definition: :: at-def ( key assoc default -- value ) key assoc ?at [ drop default ] w...

1 answer  ·  posted 1y ago by Razetime‭  ·  last activity 1y ago by erg‭

66%
+2 −0
Can UWPNuGetPackages be moved to another drive?

I'm trying to make a UWP app in Visual studio, but the NuGet package files have been huge. They just don't fit on my SSD, but I do have an HDD I could theoretically use. After a bunch of tinkering...

1 answer  ·  posted 1y ago by Ullallulloo‭  ·  last activity 1y ago by Ullallulloo‭

66%
+2 −0
How to create a quotation containing the given token in a syntax word in Factor programming language

I am trying to define a syntax word as follows: USING: kernel syntax parser fry prettyprint ; IN: syn-try SYNTAX: syn scan-word '[ _ ] . ; Given a word, I want to create a quotation conta...

2 answers  ·  posted 1y ago by Razetime‭  ·  edited 1y ago by Alexei‭

85%
+10 −0
How to manage user-specific application data on Linux?

I am developing an application that targets Linux-based OS, and I need to store the user's configuration, metadata and other things in a persistent way (i.e. on the file system). I know that one c...

3 answers  ·  posted 1y ago by Björn‭  ·  last activity 1y ago by celtschk‭

77%
+5 −0
Keep local branch changes to resolve all remaining conflicts in a merge

On branch-x, I do git merge branch-y Now there are some conflicts, and git status shows Changes to be committed: new file: a new file: b Unmerged paths: (use "git a...

1 answer  ·  posted 1y ago by Quasímodo‭  ·  last activity 1y ago by Quasímodo‭

77%
+5 −0
What is the Python Global Interpreter Lock?

What exactly is the Python Global Interpreter Lock (GIL)? As someone who is relatively new to Python, is this something I need to be aware of, or is this just some implementation detail of the inte...

1 answer  ·  posted 1y ago by Moshi‭  ·  last activity 1y ago by Derek Elkins‭

66%
+2 −0
How to plot table from pandas dataframe

MWE import pandas as pd import numpy as np import matplotlib.pyplot as plt df = pd.DataFrame(np.random.rand(9, 4), columns=['a', 'b', 'c', 'd']) df.plot.bar(table=True) # don't want plot, ...

1 answer  ·  posted 1y ago by mcp‭  ·  last activity 1y ago by __blackjack__‭