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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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+2 −0
Regex for simplifying Amazon product URLs

Amazon product URLs are often very long, but on experimentation it is revealed that the following pattern is sufficient: https://www.amazon.com/{dp|gp}/$ID ID is a 10-char string, which I'm gue...

1 answer  ·  posted 8h ago by matthewsnyder‭  ·  last activity 2h ago by mr Tsjolder‭

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How to provide meaningful names for emails in Maildir?

I am writing some scripts that operate on emails in Maildir format. A lot of things are easy in this format, but the filenames are absolutely incomprehensible. For example, one script moves mails ...

0 answers  ·  posted 4h ago by matthewsnyder‭

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Determine which script is slowing the page down in Firefox

A page is very slow and laggy in Firefox. I am certain it's one of the many Javascripts slowing it down. Out of curiosity, I'd like to figure out which script is creating the heaviest load. Note t...

0 answers  ·  posted 9h ago by matthewsnyder‭

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Shortcut for inserting today's date in VS Code

Is there a way to easily insert today's date when editing a file in VS Code?

1 answer  ·  posted 16h ago by matthewsnyder‭  ·  last activity 16h ago by matthewsnyder‭

71%
+3 −0
How to convert Dos paths to Posix paths in Powershell

What is the best way to convert Dos paths to Posix paths in Powershell? eg given: C:\Program Files\PowerShell\Modules\ I want something like: /Program\ Files/PowerShell/Modules/ Is the only so...

1 answer  ·  posted 1mo ago by kjw‭  ·  last activity 1d ago by [Object object]‭

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+4 −0
JavaScript redirect is getting "hijacked" and it is not onbeforeunload event.

My redirect in javascript somehow gets "hijacked" and I don't understand how. Previous developer (who is no longer working with the company) on page load initialized onbeforeunload event like so: ...

1 answer  ·  posted 2mo ago by Vanity Slug ❤️‭  ·  last activity 1d ago by Vanity Slug ❤️‭

60%
+1 −0
How does scoping work in R?

If I run ls() in R, it shows the variables (including functions) in my workspace. But there are other variables visible too, e.g. functions from packages like ls itself. And if I write a function...

1 answer  ·  posted 3d ago by djm‭  ·  edited 2d ago by Alexei‭

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+1 −1
How do I properly render a quad in OpenGL using a GL_TRIANGLE_STRIP primitive?

I am currently working with LWJGL and the obstacle I face right now on my project is rendering textures to a cube, e.x a set of 8 vertices with position, color, and UV information. For now, I am st...

1 answer  ·  posted 3d ago by cuzzo‭  ·  last activity 3d ago by djm‭

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+2 −0
VS Code: How to open a file and folder in a new window?

I've figured out that code --new-window /foo/bar/baz.txt will open baz.txt in a new window. But when I do this, it says "no folder opened" in the file explorer pane. That makes it hard to work with...

2 answers  ·  posted 3d ago by matthewsnyder‭  ·  last activity 3d ago by Moshi‭

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+3 −0
Is it possible to re-export types similar to JS?

I'm writing a library "MyLibrary". In there, I group code into sections that make sense. Let's say I have a folder "Reports" and a folder "Helpers". I would like to have my code separated while ...

0 answers  ·  posted 5d ago by raphaelschmitz‭

c#
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+3 −0
Clear selectManyMenu component if user unselects item in JSF 2

I am working with JSF 2.3 and have a selectManyMenu component that is marked as required but that I want to be cleared if the user unselects all items. Currently, the user can unselect all items, b...

1 answer  ·  posted 3mo ago by tarhalda‭  ·  edited 5d ago by BalusC‭

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+0 −0
Adding two products into cart with help of a checkbox.

I've created a code snippet in "functions.php" that should add another product to your cart if you mark the checkbox, but somehow, only the original product is add (like the single product from the...

0 answers  ·  posted 5d ago by gft‭  ·  edited 5d ago by gft‭

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+2 −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 5d ago by Iizuki‭  ·  edited 5d ago by Iizuki‭

60%
+1 −0
How to delete a local branch in git?

How to delete a local git branch which hasn't been pushed to anywhere, and only exists locally?

1 answer  ·  posted 6d ago by Iizuki‭  ·  edited 5d ago by Iizuki‭

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+6 −0
What is the meaning of "short circuit" operators?

When reading about various operators used by programming languages, the term "short circuit behavior" is often used. For example in this C code: int a = 0; a && b++ Someone explained t...

2 answers  ·  posted 6d ago by Lundin‭  ·  last activity 6d ago by matthewsnyder‭

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+12 −0
Are there best practices for sticking conditions in WHERE clauses vs the JOIN statement?

Lets say I have two tables, A and B and I need to join a subset of them. Is there best practices of sticking the conditions in the WHERE clause like this, SELECT * FROM A JOIN B on a.fk_b = b....

3 answers  ·  posted 3y ago by Charlie Brumbaugh‭  ·  last activity 8d ago by billkarwin‭

71%
+3 −0
How should open source forks, with a mix of upstreamable and non-upstreamable commits, be maintained?

I have a few different projects that rely on open source technology that I wish to make modifications to (say, to add key features for business or personal use) that will vary between upstreamable ...

1 answer  ·  posted 20d ago by eoin.oneill‭  ·  last activity 9d ago by matthewsnyder‭

62%
+3 −1
How do I remove an element from a Java array?

One way to remove element from array is to replace element with zero. Below is a rough snippet I am sharing: int N = sc.nextInt(); int pos = sc.nextInt(); int A[] = new int[N]; if(pos == i) { ...

1 answer  ·  posted 12d ago by abhinavxyz‭  ·  edited 12d ago by E_net4‭

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+3 −0
How do I pass field names containing dashes in dbt source yml file?

Working with dbt version 2 I'm trying to set up source checks but I'm running into an issue where the column names I'm setting tests for have dashes (e.g. my_table.some-field-with-dash). I current...

1 answer  ·  posted 14d ago by Sigma‭  ·  last activity 13d ago by Sigma‭

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+6 −0
Understanding mutable default arguments in Python

Consider this code example: def example(param=[]): param.append('value') print(param) When example is repeatedly called with an existing list, it repeatedly appends to the list, as ...

3 answers  ·  posted 14d ago by Karl Knechtel‭  ·  last activity 14d ago by Karl Knechtel‭

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Alternatives to `EXPLAIN ANALYZE` for queries that won't complete

I have a large and complex PostgreSQL SELECT query that I would like to make faster. EXPLAIN suggests it should run quickly, with the worst parts being scans of a few thousand rows. When run, it do...

2 answers  ·  posted 16d ago by Emily‭  ·  last activity 14d ago by matthewsnyder‭

33%
+0 −2
Help with android studio gradle [closed]

I need help figuring out if my dependencies need upgrading or conflict with each other. I tried using the command prompt to solve problems but it didn't help. Here is my code. Android Studio Iguan...

0 answers  ·  posted 18d ago by dnmnbg‭  ·  closed 16d ago by Alexei‭

50%
+1 −1
Is there a text version of pickle?

Is there a Python serialization format that has capabilities similar to Pickle, but is text based? The problem I always have with pickle is that it's binary, so I can't manually view or edit the d...

0 answers  ·  posted 16d ago by matthewsnyder‭

84%
+9 −0
What is the point of pipx?

Background Many Python programs now recommend installing with pipx, and there is a sense that you shouldn't install with pip anymore, you should use tools like pipx. Main Question However, what ...

3 answers  ·  posted 2mo ago by matthewsnyder‭  ·  last activity 17d ago by tripleee‭

60%
+1 −0
Optimized representation for sets?

I need to do a lot of calculations involving sets. There are relatively few values in the "universe" of candidates that could appear in any of the sets, but potentially very many such sets (they mi...

1 answer  ·  posted 20d ago by Karl Knechtel‭  ·  last activity 20d ago by Karl Knechtel‭

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+6 −0
How do I customize merge behavior for a shared git repo?

I often find it useful to arrange things so that each commit on master's first-parent is a discrete change. It allows git log --first-parent --oneline to be used as a concise, automatically-generat...

1 answer  ·  posted 3y ago by ajv‭  ·  last activity 20d ago by GrantMoyer‭

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+4 −0
How to align my content to the left?

This revolves around images. I'm trying to write an HTML page of COVID-19 safety procedures, and here's what I've written so far: <!DOCTYPE html> <html> <head> <title&...

2 answers  ·  posted 2y ago by General Sebast1an‭  ·  last activity 22d ago by Peter Taylor‭

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+2 −0
Pipeline for zipping multiple file chanel into a single output channel

I am in need of downloading some files (from dynamic list of URLs) and archive them into a single zip file. Since these files can be arbitrarily sized (totaling hundreds of MB), I want to avoid dow...

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

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+0 −0
Best practices to write functions for both execution modes in Tensorflow, eager and graph mode

I regularly run into the problem that I have a Python function that I want to use in both, eager and graph execution mode. I therefore have to adjust the code so that it can handle both situations....

1 answer  ·  posted 27d ago by daniel_s‭  ·  edited 23d ago by daniel_s‭

75%
+4 −0
Replace leaf arrays with joined strings in a nested structure in jq

Consider the following arbitrarily-nested JSON as input to a jq filter: echo '[{"foo": [1, 2]}, {"bar": [{"baz": ["foo", "baz"]}]}]' | jq '.' My goal is to join leaf arrays into strings: [{"fo...

1 answer  ·  posted 1mo ago by ggorlen‭  ·  edited 24d ago by ggorlen‭

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+2 −0
Is it okay to use python operators for tensorflow tensors?

TL;DR Is (a and b) equivalent to tf.logical_and(a, b) in terms of optimization and performance? (a and b are tensorflow tensors) Details I use Python with Tensorflow. My priorities are Make t...

1 answer  ·  posted 29d ago by daniel_s‭  ·  edited 25d ago by Anonymous‭

60%
+1 −0
`git submodule foreach git pull` in parallel

I use git submodule foreach git pull to update my submodules. There's quite a few and it appears that foreach is updating them one by one, instead of in parallel. How can I do it in parallel?

1 answer  ·  posted 2mo ago by matthewsnyder‭  ·  last activity 25d ago by GrantMoyer‭

42%
+1 −2
Listen for key events in a CLI app

I have a Python program like this: done = False while u and not done: i = u.pop() print(f"Processing {i}") do_big_task(i) finish_up() Since this takes a long time, the user m...

1 answer  ·  posted 28d ago by matthewsnyder‭  ·  last activity 25d ago by mr Tsjolder‭

66%
+2 −0
Reaching to a directory in git-bash

I have created a directory named Temporary_add_to_version_control on Desktop. Now I am trying to reach that directory by typing the following in git-bash: cd ~/Desktop/Temporary_add_to_version_con...

1 answer  ·  posted 25d ago by Birbal01‭  ·  edited 25d ago by Anonymous‭

77%
+5 −0
Name for host + path (parts of a URL)

Among other things, a URL consists of a host and a path: I was wondering (and couldn't find anything) if there's a name for the combination of host and path. Is there a name for these: examp...

1 answer  ·  posted 27d ago by Matthias Braun‭  ·  edited 27d ago by Matthias Braun‭

url
50%
+0 −0
What is a Crossfilter group?

From reading about the Crossfilter data manipulation library for JavaScript, I take it that "groups" are an important concept in its operation. However, the Crossfilter documentation does not ever...

0 answers  ·  posted 27d ago by CavanWright‭

60%
+1 −0
Can't use tf.timestamp() from within @tf.function with XLA / jit_compile=True

I would like to use tf.timestamp() when it is available (eager mode and graph mode without XLA), and use 0. (or a better fallback if there is one) when it is not available (with XLA; @tf.function(j...

0 answers  ·  posted 28d ago by daniel_s‭

42%
+1 −2
How to implement automatic text-to-link conversion in TypeScript?

I'm trying to create an automatic text-to-link conversion feature in a TypeScript application. The desired workflow is: Copy a URL to the clipboard Select some text Paste the URL - this should...

0 answers  ·  posted 29d ago by ShadowsRanger‭  ·  edited 28d ago by ShadowsRanger‭

75%
+7 −1
Automatically install all packages needed

When running various Python scripts, I often need to do this annoying dance: $ python script.py ... ModuleNotFoundError: No module named 'foo' $ pip install foo $ python script.py ... Module...

3 answers  ·  posted 4mo ago by matthewsnyder‭  ·  last activity 1mo ago by Anonymous‭

75%
+4 −0
How can I schedule a later task in Python?

I want my CLI Python program to schedule a task, and then exit. After some times has passed (say 10 minutes) the task should execute. The task can be a Python method or a shell command, whatever i...

3 answers  ·  posted 1mo ago by matthewsnyder‭  ·  last activity 1mo ago by [Object object]‭

60%
+1 −0
Tidy Ansible assert module loop output

Looping in Ansible usually produces a neat output of one line per iteration (per host): ... ok: [Arch] => (item=something) ok: [Arch] => (item=something_else) ok: [Arch] => (item=yet_a...

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

61%
+9 −5
Is it wrong to demand features in open-source projects?

I have been using open-source software, and the open-source Community is great at maintaining such projects. But I have observed something in smaller open-source projects. Whenever I demand some f...

3 answers  ·  posted 2y ago by theabbie‭  ·  edited 1mo ago by tripleee‭

71%
+3 −0
How to move a tag in git?

I have created a tag in my project, using git tag v2023 However, I forgot to commit a few changes. Now I would like to move this tag to the current point (after having committed the changes I had...

1 answer  ·  posted 2mo ago by mr Tsjolder‭  ·  edited 1mo ago by Anonymous‭

50%
+0 −0
Embedding other controller-action with Phalcon

I'm trying to revive an old project of mine. It was built with Phalcon PHP 2 or 3 (I don't even remember which version, but quite old). There I could include a call to the loop inside the controll...

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

83%
+8 −0
How to declare variable-length arrays correctly?

This is meant as a FAQ Q&A regarding variable-length arrays (VLA). The two bugs described below are surprisingly common. I'm trying to use the variable-length arrays feature of C99 (and newe...

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

77%
+5 −0
How can I properly type-hint methods in different files that would lead to circular imports?

I am writing a Python package where I have two classes in different files that (indirectly) depend on each other. If I wouldn't care about type-hints, there would be no problem, but unfortunately,...

2 answers  ·  posted 2mo ago by mr Tsjolder‭  ·  edited 1mo ago by Alexei‭

71%
+8 −2
Write to same file from multiple threads

I want to write a text file from multiple threads. The file structure is line-oriented. This means writing of lines should be atomic. I am using Qt 5.15.2. Is it enough to protect a shared QTextSt...

2 answers  ·  posted 2y ago by Silicomancer‭  ·  edited 1mo ago by Shree‭

66%
+2 −0
Android Studio "not showing null elements" in unit tests.

My Android app needs to process lists that contain nullable elements. I am using JUnit 4.13.2 for unit testing. I am using Android Studio Flamingo | 2022.2.1 Patch 2 . I have a failing test,...

1 answer  ·  posted 1mo ago by FractionalRadix‭  ·  edited 1mo ago by FractionalRadix‭

85%
+10 −0
Git: How to clone only a few recent commits?

How do I clone the repository with only part of the history? For example, let's say I want to download only the last 5 commits out of thousands.

2 answers  ·  posted 1mo ago by matthewsnyder‭  ·  last activity 1mo ago by hkotsubo‭

71%
+3 −0
How can a Python program send itself to the background?

Is it possible for a Python program to send itself in the background? For example, on Linux you can do nohup some_cmd & and any program will run in the background. Some programs also support s...

1 answer  ·  posted 1mo ago by matthewsnyder‭  ·  last activity 1mo ago by r~~‭