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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
What is a .gitkeep file?

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

1 answer  ·  posted 1y ago by Iizuki‭  ·  edited 1y 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 1y ago by Iizuki‭  ·  last activity 1y ago by Iizuki‭

kubernetes monitoring
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 1y ago by abhishek27suvarna‭  ·  edited 1y ago by CPlus‭

javascript html css
71%
+3 −0
Why does RFC 3986 (URI generic syntax) declare the "host" component to be case-insensitive when the syntax rules show it to be case-sensitive?

First, a reminder to future self (the figure RFC 3986, Section 3. Syntax Components complemented with Section 3.2. Authority): The following are two example URIs and their component parts: ...

1 answer  ·  posted 1y ago by toraritte‭  ·  edited 1y ago by toraritte‭

url uri
71%
+3 −0
How to easily support time frame grouping in queries?

I had a curiosity about how much the experienced users wait for their questions to be answered on Stack Overflow and had written a query for it: SELECT YEAR(q.CreationDate) * 100 + MONTH(q.Creatio...

1 answer  ·  posted 4y ago by Alexei‭  ·  last activity 1y ago by Michael‭

tsql sql-server grouping
75%
+4 −0
Why is global evil?

Many languages discourage global variables. Why is this?

3 answers  ·  posted 1y ago by matthewsnyder‭  ·  last activity 1y ago by mavavilj‭

software-practices language-agnostic
66%
+2 −0
PHP - Why using "global" considered bad?

In PHP why is using global like in the example below considered bad? $a = 1; class foo { public function bar() { global $a; // <-- Why is this considered bad? } } ...

1 answer  ·  posted 1y ago by Vanity Slug ❤️‭  ·  last activity 1y ago by matthewsnyder‭

php global-variables
60%
+1 −0
How to start creating a Giraffe web project and how to serve it?

Having some trouble with giraffe-template on Mac M1, so decided to set up a Giraffe project manually. Started following the Doing it manually section of the Giraffe README, but got stuck right away...

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

f# asp.net-core .net .net-core .net-core-cli
66%
+2 −0
.NET dependency management: `dotnet add package` vs. Paket?

Many older projects (i.e., older than 5 years) provide instructions to the Paket .NET dependency manager (e.g., Suave), so I started digging into it, got confused, then gave up for while because er...

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

.net-core nuget paket
36%
+2 −5
What makes people able but unwilling to contribute to FOSS projects? [closed]

Suppose someone has the requisite knowledge and skillset to contribute to a FOSS project, they have the free time to do so and they are aware of the project. Yet, they decide not to contribute. Thi...

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

open-source
90%
+16 −0
Is strcpy dangerous and what should be used instead?

I heard rumours that the strcpy function is dangerous and shouldn't be used. Supposedly it can be exploited to create buffer overflows somehow. And indeed when I compile my C code in the admittedl...

2 answers  ·  posted 4y ago by Lundin‭  ·  last activity 1y ago by Lundin‭

c strcpy strncpy buffer-overflow
66%
+2 −0
How to surround jinja expression with curly brackets?

A jinja template expression starts and ends with double curly brackets, which the templating engine consumes. But what if you need a single pair of curly brackets left in the output? Something lik...

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

jinja
50%
+2 −2
How to group a flat list of attributes into a nested lists?

I have a flat list where each item is the key and value for an attribute. I want to transform this into a nested list where each attribute is a sublist. Example input: [ "attr1 apple 1", "a...

2 answers  ·  posted 1y ago by aditya98‭  ·  last activity 1y ago by matthewsnyder‭

python grouping list
50%
+0 −0
ChromeOS Linux: Debian, how do I install Android SDK manager via command line?

ChromeOS Linux: Debian, how do I install Android SDK manager via command line? I wanted to try this repo https://github.com/JetBrains/compose-multiplatform/tree/master/examples/imageviewer and I g...

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

android debian command-line-interface chrome-os android-sdk-manager
75%
+4 −0
Why does bash seem to parse `sh -c` commands differently when called via `execl`?

When I do this in a shell: $ /bin/sh -c 'echo hello world' hello world it's my understanding that I'm running a process with argv = {"/bin/sh", "-c", "echo hello world"}. That is, the quotes c...

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

bash execl
71%
+3 −0
What guarantees does Bash make about order of :- Parameter Expansion when it is not in POSIX mode?

I tried to check info bash but only got a copy of the man page. This is when I learned that I could apt install bash-doc to get the "full" Bash manual. After checking both the info pages and the m...

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

bash
66%
+2 −0
What are the prefixes like "md:" and "ds:" in SAML metadata?

SAML service provider (and other types as well) metadata XMLs are full of prefixes like md: and ds:. What do these mean? To illustrate my point, here's a sample metadata file from Wikipedia (CC-BY...

1 answer  ·  posted 1y ago by Iizuki‭  ·  last activity 1y ago by Michael‭

saml saml-metadata
60%
+1 −0
How to log first n lines of a stack trace in Java?

How to log first n lines of a stack trace in Java?

2 answers  ·  posted 1y ago by propatience‭  ·  last activity 1y ago by hkotsubo‭

java logging stacktrace
77%
+5 −0
How to delete a remote branch in git?

How to delete a branch from a remote in git? E.g. maybe you had this branch locally too, but you deleted it already according to this question. Now you want to get rid of the corresponding remote ...

2 answers  ·  posted 1y ago by Iizuki‭  ·  last activity 1y ago by hkotsubo‭

git
57%
+2 −1
Proper location of docstring on struct with attributes

When documenting a struct with attributes, where does the docstring go? Before or after the attribute(s)? Option 1: /// Does it go here? #[derive(Deserialize, Debug)] pub struct Metadata { ...

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

rust docstrings
75%
+4 −0
How to pass command line arguments when using cargo run?

When developing a rust program you build and run using cargo run. However you cannot just append arguments to that as they will be caught (and likely rejected) by cargo itself. So how to pass argum...

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

rust rust-cargo
77%
+5 −0
Are there technical reasons to pick one struct coding style over the other?

C offers two different styles when it comes to structs (and union/enum too). Either declare them using a struct tag only ("struct tag style"): struct my_type { ... }; struct my_type x; Or ...

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

c code-style struct
77%
+5 −0
Why does this work? .collect() automatic conversion to function return type

I'm completing the rustlings exercises as part of self-teaching Rust. While working on the third iterators exercise, I solved the exercise but don't quite understand why my solution works. Specifi...

1 answer  ·  posted 1y ago by qohelet‭  ·  last activity 1y ago by Iizuki‭

rust
66%
+2 −0
Git command formatting characters in msbuild are interpreted incorrectly

I wish to add a property with the date of the current Git commit to the assembly info. From my .csproj: <Exec Command="git -C &quot;$(ProjectDir).&quot; log -1 --pretty=format:%ad" ...

1 answer  ·  posted 1y ago by LyndonGingerich‭  ·  edited 1y ago by Michael‭

git msbuild encoding csproj
57%
+2 −1
What is the difference between hashing and encryption?

According to this article: Since encryption is two-way, the data can be decrypted so it is readable again. Hashing, on the other hand, is one-way, meaning the plaintext is scrambled into a uniqu...

3 answers  ·  posted 1y ago by Julius H.‭  ·  last activity 1y ago by matthewsnyder‭

hash
41%
+3 −5
Building a language model completely from scratch

What I would like to do I would like to try to build a language model 100% from scratch if possible, for a learning experience. That means no external libraries and no pre-curated datasets. It ...

1 answer  ·  posted 1y ago by Julius H.‭  ·  last activity 1y ago by matthewsnyder‭

machine-learning llm
75%
+4 −0
Why does `Zip` require `Semialign`

The Zip class from Data.Zip requires an implementation of Semialign: class Semialign f => Zip f In my mind: Zip takes the intersection of two shapes. Semialign takes the union of two sha...

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

haskell
60%
+4 −2
What happens when you “Sign in with Google”?

I believe when you sign in with Google, the web application running in your browser calls a command to request the Google Sign In page, and includes a “callback URL” as a parameter in that HTTP req...

0 answers  ·  posted 1y ago by Julius H.‭  ·  edited 1y ago by Julius H.‭

devise single-sign-on
75%
+4 −0
How do you add "Sign In with Google" to a Ruby on Rails web application that is using the Devise authentication framework?

I want to add the ability to "Sign in with Google" into a Ruby on Rails web application, that is using Devise to handle authentication. How do I do that?

1 answer  ·  posted 1y ago by Julius H.‭  ·  last activity 1y ago by Julius H.‭

ruby ruby-on-rails devise google-signin
60%
+1 −0
Can Swashbuckle.AspNetCore generate exclusiveMinimum validation?

Is there a way to make Swashbuckle.AspNetCore generate a Swagger exclusiveMinimum range validation for a model property? There doesn't seem to be any way to do this with the attributes recognized ...

1 answer  ·  posted 1y ago by Kevin Krumwiede‭  ·  last activity 1y ago by Kevin Krumwiede‭

swagger swashbuckle-aspnetcore
60%
+1 −0
MongoDB Java Morphia case insensitive criteria query?

So I googled some on how to make a case insensitive criteria query but could not find the solution very easily. So I basically have code that looks like this: ... query.criteria("fieldName").con...

1 answer  ·  posted 1y ago by propatience‭  ·  edited 1y ago by propatience‭

java mongodb morphia case-insensitive
66%
+2 −0
What is the purpose of having a wrapper class for JarFile in Spring-boot-loader?

My question relates to Spring-boot-loader v2.6.15. For the purposes of this question, I will refer to Spring's custom JarFile class as CustomJarFile to avoid confusion. Context I am reusing so...

1 answer  ·  posted 1y ago by Miss Skooter‭  ·  last activity 1y ago by Miss Skooter‭

java spring spring-boot
91%
+20 −0
Should a salt be stored in the same database as the hash?

To protect against dictionary and rainbow table attacks it is well known that passwords should be salted before hashing. The salt (unique to each password) gets stored with the hash, often in the s...

5 answers  ·  posted 4y ago by jla‭  ·  last activity 1y ago by bencurthoys‭

security hash salt
77%
+5 −0
Is there any rationale for the lack of local constants in PHP?

The last few years, PHP has basically exploded with lots of modern language constructs that makes the life easier. But local constants are still missing, and I find that very strange. I have found...

0 answers  ·  posted 1y ago by klutt‭

php
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 2y ago by mcp‭  ·  edited 1y ago by Karl Knechtel‭

python exception
84%
+9 −0
Open file in script's own folder

I have a Python script that needs to access some data (or configuration) file in its very own folder. For example, say script.py does something like this: with open('data.txt') as file: data ...

2 answers  ·  posted 3y ago by J-hen‭  ·  last activity 1y ago by Karl Knechtel‭

python file-handling
66%
+2 −0
How to write a function that only accepts a list of `Error string` `Results` in F# on the level of types?

For example, given a mergeErrors function where input is always a list of Error strings, let es = [ Error 1; Error 2; Error 3 ] let mergeErrors<'a> (errors: Result<'a,int> list) : R...

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

f#
50%
+0 −0
Why is inter-VLAN communication not working in my bus topology network set-up in Cisco Packet Tracer?

I have created a simple bus topology connecting 2 switches and a router, with each switch connected to their respective end devices through ordinary star topology. The switch model used was 3560-24...

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

cisco packet-tracer networking vlan
71%
+3 −0
Is it possible to obtain the unlock code from an unlocked Android device via the Android API or the developer command line tools?

I have an Android 10 device where the OS is unlocked but the bootloader is not. I can't obtain the unlock code through the normal channels because of bureaucratic incompetence. Given that the devi...

0 answers  ·  posted 1y ago by Kevin Krumwiede‭  ·  edited 1y ago by Alexei‭

android android-10
66%
+2 −0
Do the elements of 'required' array need to be defined in 'properties' dictionary in JSON schema?

In a JSON schema, do the required properties need to be a subset of properties? E.g. is this a valid schema, even though cookies isn't mentioned in properties? { "type": "object", "properti...

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

json json-schema
60%
+1 −0
Command to format code from repo into single markdown file

I'm trying to flatten a repository of Python code into a Markdown file where each file is formatted like: relative/path/to/file1.py # contents of file1.py I'm using this command: find . -name...

2 answers  ·  posted 1y ago by ShadowsRanger‭  ·  last activity 1y ago by Michael‭

bash
71%
+3 −0
What does F#'s `box` keyword do and where is it documented?

The Null Values article in the F# Language Reference show an example that uses it, but it does not explain what it does exactly. You can use the following code to check if an arbitrary value is ...

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

f#
50%
+0 −0
What is a "sealed" type in F# and why doesn't the type test pattern operator (:?) work on it out of the `box`?

The F# language guide (see Signatures article) has a very sparse definition of what a "sealed" type is: Attribute Description [<Sealed>] For a type that has no abstract me...

0 answers  ·  posted 1y ago by toraritte‭  ·  edited 1y ago by toraritte‭

f#
75%
+4 −0
How to troubleshoot ModuleNotFoundError?

I ran some Python code and it crashed with ModuleNotFoundError. What is the general approach for dealing with these situations?

2 answers  ·  posted 1y ago by matthewsnyder‭  ·  last activity 1y ago by Karl Knechtel‭

import python-3
77%
+5 −0
Best practices for company internal Swagger Docs in production

The current project I am working on consists of a bunch of microservices (Web APIs) accessible only internally using Entra ID (formerly Azure ID). To simplify the development, all services expose ...

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

security swagger swagger-ui
50%
+0 −0
How to change the color of a cell to a user defined value while keeping its existing style using NPOI from F#?

The answer provided in the How to set the cell color to a user defined value using NPOI from F#? thread solves the problem of how to set the right properties using F#, but it uses a new ICellStyle ...

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

f# excel NPOI
60%
+1 −0
How to set the cell color to a user defined value using NPOI from F#?

As far as I can tell (from F# at least), cell can only be colored using predefined NPOI.SS.UserModel.IndexedColors. From the available methods / properties, val it: ICellStyle = NPOI.XSSF.UserM...

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

f# excel NPOI
60%
+1 −0
What is the difference between `static let` and `static member` in F#?

Taking the example from this Stackoverflow question: type Vector2D(dx : float, dy : float) = static let zero = Vector2D(0.0, 0.0) static let onex = Vector2D(1.0, 0.0) static let ...

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

f#
50%
+0 −0
Does Socket.AcceptAsync throw SocketException for any transient reason?

I'm writing exception handling around a call to Socket.AcceptAsync in a loop. One of the exceptions it's documented to throw is SocketException, but the documentation is vague: An error occurred...

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

c# sockets
33%
+0 −2
module not found error, I need this speech directory for this project to work. [closed]

--- Here is the error message. Traceback (most recent call last): File "c:\Users\19185\Documents\GitHub\Chatty\Chatty\one_.py", line 3, in import azure.cognitiveservices.speech as speechsdk Mo...

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

python-3