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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)
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+3 −0
How to sort the output of meta / slash commands in `psql`?

For example, how to sort the output below by the values in "Column" in the psql shell itself? my_db=> \d auth_user Table "public.auth_user" Column ...

1 answer  ·  posted 6d ago by toraritte‭  ·  edited 8h ago by MER‭

60%
+1 −0
Add an IDistributedCache to EntityFramework

Is there a standard way to add an IDistributedCached in front of a database using EntityFramework? Something that handles checking the cache for reads, updating the cache on writes, and uses distri...

0 answers  ·  posted 23h ago by rcmosher‭

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+1 −0
In javascript is there really a good reason to never check for boolean true || false such as if(var){}else{}?

I am fairly certain this isn't a duplicate so please bear with me. I check for boolean true||false using if() as a matter of course in my programming. I've programmed extensively in PHP, some in C...

3 answers  ·  posted 1d ago by MER‭  ·  last activity 23h ago by hkotsubo‭

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+6 −0
TypeScript is unable to infer the correct type for a mapped tuple

I was playing around with mapped tuples and came across an interesting case where TypeScript cannot infer the types used: interface Foo<A, B> { (a: A, b: B): any } function test<...

0 answers  ·  posted 2y ago by Moshi‭  ·  edited 4d ago by Moshi‭

60%
+1 −0
TypeScript won't recognize cross-module type extensions

I'm trying to write a Node module that extends the functionality of another module (a peer dependency which I do not control) using a register function exposed by the other module. This adds additi...

0 answers  ·  posted 4d ago by Andrew Ray‭

75%
+4 −0
Testing an opaque type's internals

First: What is an opaque pointer in C? Now when it comes to testing such a type, I know of 3 ways: Include the source file (the one containing the definition of the type and the functions tha...

2 answers  ·  posted 5d ago by Melkor-1‭  ·  last activity 4d ago by John C‭

60%
+1 −0
Docker push fails with message "denied: requested access to the resource is denied"

Recently I had to push a new Docker image to our GitLab registry. I have the Maintainer role on that project. I had created a new token and used it to log in to Docker. However, when trying ...

1 answer  ·  posted 4d ago by FractionalRadix‭  ·  last activity 4d ago by FractionalRadix‭

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+4 −0
Can you run Python code on text in VS Code?

In VS Code, is it possible to run Python code on the text being edited? I realize that I can save my text, create a .py file, switch to a terminal (including VS Code's own terminal) and run the .p...

1 answer  ·  posted 7mo ago by matthewsnyder‭  ·  last activity 4d ago by Alexei‭

88%
+13 −0
Are "strong passwords" at all meaningful?

Whenever registering to diverse sites on the net, you are often forced to enter a so called "strong password", which would ideally contain both upper case letters, lower case letters, digits, and s...

4 answers  ·  posted 5mo ago by Lundin‭  ·  last activity 5d ago by Michael‭

33%
+0 −2
How do I concatenate two animated gifs together? [closed]

How do I concatenate two animated gifs together? The gifs are identical in dimensions and I would like to stitch them together so they play one after the other.

1 answer  ·  posted 8d ago by congusbongus‭  ·  closed 7d ago by Alexei‭

gif
42%
+1 −2
How would I display the first line of all files matching a glob? [closed]

My use case is a collection of CSV files, each with header row. What I want to know is what subset(s) of them are "union compatible", although I also want matching column names before stacking thes...

1 answer  ·  posted 9d ago by lori‭  ·  edited 8d ago by Alexei‭

71%
+3 −0
PEP20 on namespaces: What exactly is it saying to do?

PEP20 aka the Zen of Python has a statement: Namespaces are one honking great idea -- let's do more of those! What exactly are we supposed to "do" according to this? Is it saying we should h...

1 answer  ·  posted 6mo ago by matthewsnyder‭  ·  last activity 8d ago by BlckKnght‭

60%
+1 −0
How to hide files from the VS Code sidebar without pattern matching?

I want to clear my view of my file explorer sidebar in VS Code, and just see a few files I want to focus on. Is there an easy way to do this, using the mouse, and not file hiding using pattern mat...

2 answers  ·  posted 3mo ago by Julius H.‭  ·  last activity 8d ago by Monica Cellio‭

77%
+5 −0
How and where does Python code start running? How can I control that?

Suppose I have some code in a file myscript.py like: def my_function(): print("Test") What steps do I need to take in order to make my_function run? That is to say: how do I get Python to ...

2 answers  ·  posted 28d ago by Karl Knechtel‭  ·  last activity 8d ago by Monica Cellio‭

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+6 −0
How do I share a type between a client and server, but make a specific field optional for one and required for the other?

Let's say I have a client/server application with a data structure on the server side: type User = { name: string; superSecretGovernmentIdNumber: string; }; These fields are both non-nul...

2 answers  ·  posted 7mo ago by Emily‭  ·  last activity 9d ago by Jacob Raihle‭

62%
+3 −1
How do I choose the correct Perl module from these variations?

When looking for Perl modules to handle JSON strings and/or documents, I found JSON::PP and JSON::XS. The documentation of JSON::PP says it is compatible with JSON::XS. What do these suffixes me...

2 answers  ·  posted 3y ago by ghost-in-the-zsh‭  ·  last activity 9d ago by ivan‭

66%
+2 −0
Can I conditionally include class members without using #ifdef?

#ifdef sections can, of course, be used to include or exclude chunks of code based on some criteria known at compile time. One big problem is that when the condition is evaluated to false, the chun...

1 answer  ·  posted 10d ago by Hyperlynx‭  ·  last activity 9d ago by Angew‭

c++
50%
+0 −0
How do you fix 'Failed to load the dll hostfxr.dll' when starting an x86 .NET process in a test run via dotnet test?

How do you fix the error 'Failed to load the DLL hostfxr.dll' when running a .NET test executed via dotnet test and starting an x86 .NET application in the test? I'm using .NET 8. Failed to load ...

1 answer  ·  posted 10d ago by riQQ‭  ·  last activity 10d ago by riQQ‭

83%
+8 −0
Tools for debugging coredumps

For debugging running programs I often use whatever is integrated with the IDE I am using. QtDeveloper right now, but also used Eclipse, Netbeans and others. Most of them just use gdb under the hoo...

1 answer  ·  posted 3y ago by Estela‭  ·  last activity 10d ago by Invisible Mender‭

66%
+2 −0
Maven exec:exec fails to see executables

I am stumped at Maven exec plugin. Running mvn exec:exec -Dexec.executable="curl" (or "echo") works. But when running mvn exec:exec or mvn exec:exec@b (or @a) it fails saying The parameter 'exe...

1 answer  ·  posted 10mo ago by LAFK‭  ·  last activity 11d ago by mirabilos‭

66%
+2 −0
How can I manage multiple consecutive strings in a buffer (and add more later)?

This question is inspired by If I have a char array containing strings with a null byte (\0) terminating each string, how would I add another string onto the end? on Stack Overflow. Suppose I have...

2 answers  ·  posted 2mo ago by Karl Knechtel‭  ·  last activity 18d ago by Lundin‭

60%
+1 −0
ServletContext matched by more than 1 path

The javadoc for ServletContext.getContextPath() says that It is possible that a servlet container may match a context by more than one context path. I was trying to find any explanation how t...

0 answers  ·  posted 18d ago by morgwai‭

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+4 −0
When to use custom iterators versus pointers

I am working on a toy project where I have a container for which I would like to write an iterator that iterates over the values in the container. Because the values are stored in a (c-style) arra...

1 answer  ·  posted 1mo ago by mr Tsjolder‭  ·  last activity 19d ago by Angew‭

50%
+0 −0
Migrating from Az Co DB NoSQL to Az Co DB MongoDB, error?

With Azure Data Factory I tried migrating from Azure Cosmos DB NoSQL to Azure Cosmos DB MongoDB. The export went fine from the NoSQL but the import to the MongoDB did not work. I got no reasonable ...

1 answer  ·  posted 22d ago by propatience‭  ·  last activity 22d ago by propatience‭

40%
+0 −1
Addressing W25Q64 flash IC [closed]

I am using a W25Q64 flash ic to store some stuff for an ESP-32 project. I used this library from Github as it seems intended for ESP. It seemed weird that the read function uses two 16-bit paramet...

0 answers  ·  posted 24d ago by HinkyDinky‭  ·  closed 23d ago by Lundin‭

60%
+1 −0
Why does `distutils` seem to be missing or broken? Isn't it part of the standard library?

Sometimes when I try to install a third-party library for Python, I get an error saying that either distutils, or some part of it like distutils.core or distutils.util, could not be found. It's sho...

1 answer  ·  posted 24d ago by Karl Knechtel‭  ·  last activity 24d ago by Karl Knechtel‭

66%
+2 −0
Best practices for business versioning within Web APIs

Context Our team is developing a solution mainly composed of several microservices relying on ASP.NET Core. We have decided that the simplest and most cost-effective solution would be for service...

0 answers  ·  posted 26d ago by Alexei‭  ·  edited 26d ago by Alexei‭

81%
+7 −0
PGP sign emails sent with git-send-email(1)

How can we use git-send-email(1) to sign patches (emails) with the gpg(1) keyring? I've heard it can be done, but couldn't find anything in the git-send-email(1) documentation nor in a web search.

3 answers  ·  posted 2y ago by alx‭  ·  last activity 26d ago by alx‭

77%
+5 −0
What determines where the focus goes back to when clicking on a browser's back button?

As far as I can tell, it is in part determined by the HTML spec's History API1, specifically the value of history.scrollRestoration. Quoting the HTML spec's scroll restoration mode paragraph: ...

1 answer  ·  posted 1mo ago by toraritte‭  ·  last activity 27d ago by toraritte‭

50%
+0 −0
How to merge Django model query results?

I have to modify a legacy Django web application where there are 2 tables to store the same information using the same database structure, and the only difference is the names of the tables (and th...

1 answer  ·  posted 1mo ago by toraritte‭  ·  last activity 1mo ago by toraritte‭

60%
+1 −0
Adding dependency with cabal in gitlab-ci

I have a project I normally build with nix and cabal, however I also want to publish my documentation onto gitlab pages. It's impractical to run my nix on the gitlab CI, so I've just been using cab...

0 answers  ·  posted 1mo ago by WheatWizard‭

60%
+1 −0
Convert Synapse SQL Server hex `sid` to Azure Entra group object ID.

Suppose I have an Azure Synapse Serverless SQL database. I can run the following to get the sid of added groups: select name, type_desc, authentication_type_desc, sid from sys.database_principal...

0 answers  ·  posted 1mo ago by daviewales‭

71%
+3 −0
Privilege escalation from Python like from systemd

When you try to do a privileged systemd operation without the privilege, you get an escalation prompt: $ systemctl stop docker ==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ==== ...

1 answer  ·  posted 1mo ago by matthewsnyder‭  ·  last activity 1mo ago by Karl Knechtel‭

66%
+2 −0
Images won't fit flex container on chrome

I browse deviantArt from time to time and I wanted to make images display bigger, because there is so much useless whitespace on that site. On first glance that would be simple - remove the set di...

1 answer  ·  posted 1mo ago by martixy‭  ·  last activity 1mo ago by martixy‭

50%
+0 −0
Why does `let map f = id >=> switch f` work in F#?

Asked How to implement map using the fish (>=>, Kleisli composition) operator in F#? a couple of hours ago, and r~~'s answer blew my mind: let map f = id >=> switch f It is perfect ...

1 answer  ·  posted 2mo ago by toraritte‭  ·  edited 1mo ago by Alexei‭

77%
+5 −0
How can one import two classes with the same name in Java8?

Some development tools provide an error message when a user tries to import two things (classes, packages) with the same name. Some programming languages offer a syntax to import one of those thing...

2 answers  ·  posted 4mo ago by tarhalda‭  ·  last activity 1mo ago by Michael‭

50%
+0 −0
Eclipse Custom Errors for Annotation Processing

In Eclipse, is it possible to setup custom errors or markers in the editor, for annotation processing? For example, the standard squiggly lines with descriptions. This question is not important. ...

0 answers  ·  posted 1mo ago by tylerbakeman‭

66%
+2 −0
Understanding the Matrix protocol vs Matrix server and what can be implemented from scratch

Since Matrix messenger offers only a protocol,[1] as a software engineer I can choose to: Write my own client or use an existing client Write my own server with my own server logic or join an e...

1 answer  ·  posted 1mo ago by erjcan‭  ·  last activity 1mo ago by Michael‭

66%
+2 −0
Integrating a standalone database 'engine' into an OLAP database

I'm trying to build a proper understanding of what an OLAP[1] datastore vs an OLAP data engine is. I tend to put too much value on keywords like "engine" vs "data store." If it has "engine," I thin...

0 answers  ·  posted 1mo ago by erjcan‭  ·  edited 1mo ago by Michael‭

50%
+0 −0
Kubectl exec: "Error from server (BadRequest): Upgrade request required"

I'm getting an error when trying to open a shell to a pod. This used to work. $ kubectl exec --tty --stdin --namespace my-ns my-pod -- sh Error from server (BadRequest): Upgrade request required ...

1 answer  ·  posted 1mo ago by Iizuki‭  ·  last activity 1mo ago by Iizuki‭

50%
+2 −2
How to write a bash function to sanitize filenames for Linux and Windows

I'm trying to write a bash function that can sanitize filenames to make them compatible with both Linux and Windows file systems. The function should perform the following operations: Replace in...

0 answers  ·  posted 1mo ago by ShadowsRanger‭

50%
+0 −0
How to test if chrome dev tools are open in JavaScript?

Some web sites are able to detect that Developer Tools is open as output a message in a the console. How does JavaScript know that the Chrome DevTools are open? Could this be spoofed?

0 answers  ·  posted 1mo ago by kreijstal‭  ·  edited 1mo ago by Alexei‭

66%
+2 −0
VS code - stop reopening old tabs

When I open VS Code inside a project dir, it reopens all the tabs that were open last time, and re-expands all the folders that were unfolded last time. I find this annoying. Usually, when I close...

0 answers  ·  posted 1mo ago by matthewsnyder‭

77%
+5 −0
How to break infinite loop in CTE

I have a parent-child relation in my table, with possibly circular cases. Is it possible to break the infinite recursion in CTE checking values of all previous rows? I would need something like thi...

3 answers  ·  posted 3y ago by artaxerxe‭  ·  edited 1mo ago by Michael‭

80%
+6 −0
Can I access an array element from a pointer to an object contiguous with but outside the array?

C prohibits accessing an array out of bounds even if measures were taken to ensure that what should lie outside those bounds were known: struct MyStruct { int x[2]; int y, z; }; static...

1 answer  ·  posted 2mo ago by CPlus‭  ·  last activity 1mo ago by Lundin‭

80%
+6 −0
Is migrating emails from one hosting provider to another a trouble?

I rent a shared-hosting environment with CentOS-Bash, Apache, PHP, MySQL and a web-based IMAP email client (Roundcube) and some more tools, on which I host my personal website; I don't have Cpanel...

1 answer  ·  posted 3y ago by deleted user  ·  edited 1mo ago by Alexei‭

50%
+0 −0
How to implement `map` using the fish (>=>, Kleisli composition) operator in F#?

I'm learning monadic composition through Scott Wlaschin's Railway-oriented Programming post. Oncebind, switch, and >=> functions are defined, he introduces map to show how to "turn a one-trac...

1 answer  ·  posted 2mo ago by toraritte‭  ·  last activity 1mo ago by r~~‭

71%
+3 −0
What is a .gitkeep file?

Sometimes there are empty files named .gitkeep sprinkled around a repository. What are these files?

1 answer  ·  posted 2mo ago by Iizuki‭  ·  edited 2mo ago by Iizuki‭

git
75%
+4 −0
Simplest way of getting failure notification emails from kubernetes

What would be the simplest (and most lightweight) way of getting email notifications of failures in kubernetes clusters. Mostly interested in failing pods, so notifying on certain kubernetes event ...

1 answer  ·  posted 2mo ago by Iizuki‭  ·  last activity 2mo ago by Iizuki‭

22%
+0 −5
How to Select From Multiple images to display main product image? [closed]

Below are the links to code for my project. HTML CSS JavaScript I have created Magnifying Image which was successful now I am trying to add multiple images which can be display in main produc...

0 answers  ·  posted 4mo ago by abhishek27suvarna‭  ·  edited 2mo ago by CPlus‭