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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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+4 −1
How can I build a string from smaller pieces?

Suppose I have some variables like: >>> count = 8 >>> status = 'off' I want to combine them with some hard-coded text, to get a single string like 'I have 8 cans of Spam®; b...

2 answers  ·  posted 9mo ago by Karl Knechtel‭  ·  last activity 8mo ago by Karl Knechtel‭

87%
+12 −0
What are statements and expressions?

When I have tried to read technical explanations of the syntax rules for programming languages, and when I am trying to decipher error messages, I often encounter the terms expression and statement...

4 answers  ·  posted 9mo ago by Karl Knechtel‭  ·  last activity 8mo ago by Dirk Herrmann‭

71%
+3 −0
How can I output / display multiple values, with controlled spacing, without building a string?

I know that I can display a single string in the terminal window like print("example") (or similarly with a string in a variable), and I know how to open text files and write to them. I also know ...

1 answer  ·  posted 8mo ago by Karl Knechtel‭  ·  last activity 8mo ago by Karl Knechtel‭

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

66%
+2 −0
What does the w3c standard say about tabbing away from a disabled element?

I'm looking at the behaviour of Chrome and my test framework and trying to understand what the correct behaviour should be before raising an issue/ticket on one or the other (or revisiting how my t...

0 answers  ·  posted 9mo ago by pureferret ‭  ·  edited 9mo ago by Alexei‭

61%
+6 −3
Why are commas not needed for modulo string formatting when printing?

Suppose I have two variables that are called animal and age, and print them as a string in the console like so: animal = "giraffe" age = 25 print("A %s can live up to %d years" %(animal,age)) ...

3 answers  ·  posted 1y ago by Bennshinpoes‭  ·  edited 9mo ago by Karl Knechtel‭

60%
+1 −0
How to call static methods in ColdFusion?

How to use static functions in ColdFusion? How to import component? How to call a static function using both tag and script syntaxes? Adobe added support for static functions in ColdFusion...

0 answers  ·  posted 9mo ago by Vanity Slug ❤️‭

71%
+3 −0
How to compress columns of dataframe by function

Problem How can I compress each column of a dataframe to the output of a function (i.e., mean), preserving columns? MWE import pandas as pd data = {"A": [1, 2, 3, 4], "B": [5, 6, 7, 8]} ...

2 answers  ·  posted 1y ago by mcp‭  ·  last activity 9mo ago by mr Tsjolder‭

77%
+5 −0
Programmatically import, edit and export DBC files

I am looking for a way to programmatically edit and save .dbc files that are meant for J1939 CAN communication. I have a few large files that need to be compared/edited. Being able to import, edit...

1 answer  ·  posted 10mo ago by HinkyDinky‭  ·  last activity 9mo ago by HinkyDinky‭

60%
+1 −0
How to solve the "ReferenceError: service is not defined"?

Temporary notice: this is part of an ongoing project of transferring and splitting my canonical from Stack Overflow on common errors in Google Apps Script. As soon as the Q&As are finalized, ...

1 answer  ·  posted 9mo ago by Oleg Valter‭  ·  last activity 9mo ago by Oleg Valter‭

71%
+3 −0
How do I serialize a const generic length array with Serde?

I have the following code: use serde::{Deserialize, Serialize}; #[derive(Sereialize, Deserialize)] struct Container<const SIZE: usize> { contents: [String; SIZE] } But I'm getti...

0 answers  ·  posted 9mo ago by mousetail‭

66%
+2 −0
VS Code can't find node installation due to dynamically setting the PATH

I installed Node.js using NVS to manage my node installations. This works great, except that I haven't been able to figure out how to debug using VS Code. When trying to launch, I receive this err...

0 answers  ·  posted 9mo ago by Moshi‭

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+4 −0
How do I pull new changes in git submodules?

I have a git repository with some submodules. When the submodule repos get new commits on the remote, how can I pull them all?

0 answers  ·  posted 9mo ago by matthewsnyder‭

71%
+3 −0
How to solve the "Cannot call from this context" error?

Temporary notice: this is part of an ongoing project of transferring and splitting my canonical from Stack Overflow on common errors in Google Apps Script. As soon as the Q&As are finalized, ...

1 answer  ·  posted 9mo ago by Oleg Valter‭  ·  last activity 9mo ago by Oleg Valter‭

71%
+3 −0
How to resolve the mypy error "Returning Any from function declared to return 'Dict[str, Any]'" in Python?

I have a function that loads JSON data and is declared to return a dictionary with string keys and values of any type (Dict[str, Any]). However, mypy is raising an error stating that I am returning...

1 answer  ·  posted 9mo ago by ShadowsRanger‭  ·  last activity 9mo ago by Moshi‭

66%
+2 −0
Does Snowflake NATURAL JOIN support outer-style join?

I like using NATURAL JOIN in Snowflake, because I find it more elegant than explicit join clauses. However, it appears that the natural join behaves similar to an inner join, in that null values o...

1 answer  ·  posted 9mo ago by matthewsnyder‭  ·  edited 9mo ago by matthewsnyder‭

66%
+2 −0
"Move symbol" refactor for Python in Visual Studio Codium

Is there a way to add support for "move symbol" in Python code for VS Codium? PyCharm can do this, but I am looking for a VSC solution. PyLance can do this, but PyLance itself is closed source, a...

0 answers  ·  posted 9mo ago by matthewsnyder‭  ·  edited 9mo ago by matthewsnyder‭

33%
+2 −6
How do I use an existing AI model to classify pornographic images? [closed]

In the last few months, AI has advanced considerably, notably in the area of generating images. We now have powerful models like DALL-E, Stable Diffusion, etc. These are quite competent at generati...

0 answers  ·  posted 9mo ago by matthewsnyder‭  ·  closed 9mo ago by Alexei‭

50%
+2 −2
Slicing a dictionary using a string variable

I am working on adding uncertainty to some of my dynamics within a larger Monte Carlo simulation. As a way to perform multiple operations on each value, I decided to make and use a new function to ...

1 answer  ·  posted 9mo ago by megalomaniac‭  ·  edited 9mo ago by megalomaniac‭

66%
+2 −0
Log4j2 not looking for log4j.properties even with the system property set

I am migrating an application from Log4j1 to Log4j2 using the API bridge jar. All references to the log4j1.jar have already been removed. I set the system property in Websphere as a JVM argument -...

1 answer  ·  posted 9mo ago by tarhalda‭  ·  edited 9mo ago by Alexei‭

66%
+2 −0
Redux Toolkit Issue with Managing States

I am all new with using Redux Toolkit, I followed the official documentation to setup the store: // store.ts import { configureStore, ThunkAction, Action, combineReducers } from '@reduxjs/toolkit...

0 answers  ·  posted 9mo ago by boudagga.ma94‭

60%
+1 −0
What can be used in react-native instead of an html label tag to achieve the same result?

I wanna make a form in React native. A field in this form in (non-native) React would be like this: <div> <label htmlFor="lastName">Last Name:</label> <input type="text...

0 answers  ·  posted 9mo ago by andre‭  ·  edited 9mo ago by andre‭

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...

0 answers  ·  posted 9mo ago by LAFK‭

80%
+6 −0
How to use function composition for applying a function to first elements of a list?

Can anyone explain to me why my Haskell function gives rise to a type-definition error? Originally, I wrote the following function to subtract one from the first n elements in a list: dec_first :...

2 answers  ·  posted 9mo ago by mr Tsjolder‭  ·  last activity 9mo ago by mauke‭

42%
+1 −2
Program freezing in `post_comments_to_lemmy` function due to potential infinite loop

I'm experiencing an issue where my program appears to freeze when executing the post_comments_to_lemmy function. This function fetches comments from the GitHub API and posts them to a Lemmy instanc...

1 answer  ·  posted 9mo ago by ShadowsRanger‭  ·  last activity 9mo ago by __blackjack__‭

81%
+7 −0
How do I add functionality to the back button?

How do I add functionality to the back button in Android without reimplementing the back button entirely? Prior to last year, I would just call onBackPressed() and then simply override it: overri...

1 answer  ·  posted 9mo ago by Ullallulloo‭  ·  edited 9mo ago by Ullallulloo‭

77%
+5 −0
Lemmy API: how to get list of followed/subscribed communities.

Context Using the lemmy API, I'm trying to get a list of sublemmies (lemmy communities) that a user is following. Reading the documentation, I using the /site endpoint, I should be able to get a ...

1 answer  ·  posted 10mo ago by elvis_depresley‭  ·  last activity 9mo ago by tgxn‭

83%
+8 −0
What are disadvantages of static functions (ie functions with internal linkage) in C?

Functions in C have external linkage by default. In other words, the storage class specifier extern is applied to functions by default, with the effect that they are visible to all translation unit...

3 answers  ·  posted 9mo ago by Lover of Structure‭  ·  last activity 9mo ago by Dirk Herrmann‭

66%
+2 −0
Can I package a database other than SQLite with a Flutter app?

Flutter supports packaging a SQLite instance with a Flutter app using the Sqflite plugin. I do not like the speed of SQLite or the fact that it does not enforce column datatypes and want to use som...

0 answers  ·  posted 9mo ago by tarhalda‭  ·  edited 9mo ago by tarhalda‭

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

40%
+2 −4
constructor in C

#include<stdio.h> struct Book { char title[20]; char author[20]; int pages; }; void init_Book_types(struct Book* aTitle,struct Book* aAuthor,struct Book* aPages){ aTitle->ti...

2 answers  ·  posted 3y ago by deleted user  ·  last activity 9mo ago by __blackjack__‭

57%
+2 −1
Can pandas be used as a database backend for persistent storage?

Question What is the current state of the art database app? How does it compare to SQL? Can pandas be used in place of either? If not, is there something that bridges the gap between SQL and pand...

2 answers  ·  posted 10mo ago by mcp‭  ·  last activity 9mo ago by matthewsnyder‭

63%
+5 −2
Prevent vscode from inserting new lines in the middle of my code on format.

I am cleaning up java code in vscode to make it more readable. When I format my document there are instances when vscode inserts new line character when I don't want it. Here I show 2 examples of w...

1 answer  ·  posted 10mo ago by Vanity Slug ❤️‭  ·  edited 10mo ago by Vanity Slug ❤️‭

80%
+6 −0
How do I find disjoint sets in a dataset

I have a dataset of car bookings like this: car_id user_id 1 1 2 1 1 2 3 3 1 2 3 3 In this dataset, two separate groups/sets of cars and users...

2 answers  ·  posted 10mo ago by andreas‭  ·  edited 10mo ago by matthewsnyder‭

80%
+6 −0
When using the compare function in Array.prototype.sort, how to avoid an element to be processed more than once?

When using the Array.prototype.sort method, we can pass a compare function as argument. Then, this function can be used to process array's elements, so the comparison is made using some custom crit...

2 answers  ·  posted 2y ago by hkotsubo‭  ·  last activity 10mo ago by matthewsnyder‭

84%
+9 −0
Are there references in C?

When reading posts at programming sites such as this one, I frequently encounter people saying things like: "There is no pass-by-reference in C, everything is passed by value." People claiming su...

3 answers  ·  posted 2y ago by Lundin‭  ·  last activity 10mo ago by Alexei‭

71%
+3 −0
Problems with Google Apps Script API JavaScript "How to... Execute function"

As this is the first question about Google Apps Script, here is a very brief description: it is a platform that helps people easily get programmatic access to Google apps data like Gmail messages, ...

1 answer  ·  posted 10mo ago by Wicket‭  ·  last activity 10mo ago by Wicket‭

77%
+5 −0
Possible drawbacks for having duplicate local sources of the project tracking the same Git remote

Context I have started working on an Angular upgrade for a medium-sized project (from v. 10 to v. 15) and this is a rather long activity that is interrupted by other changes that need to be perfor...

2 answers  ·  posted 10mo ago by Alexei‭  ·  last activity 10mo ago by Andrew‭

50%
+0 −0
How to move Rancher Desktop virtual disk file to another location?

I am using Rancher Desktop as an alternative to Docker Desktop. After using docker for a while I have noticed that C:\Users\user\AppData\Local\Docker\wsl\data\ext4.vhdx has grown quite a bit (20GB+...

1 answer  ·  posted 10mo ago by Alexei‭  ·  last activity 10mo ago by Alexei‭

77%
+5 −0
How to configure Python pip to look for packages in a private index first?

When I run pip install foo, pip looks for foo in PyPi. I want it to look for it first in a private repo, let's say pypi.bar.com. Only if foo cannot be found in pypi.bar.com, should pip then look f...

1 answer  ·  posted 10mo ago by matthewsnyder‭  ·  last activity 10mo ago by tripleee‭

71%
+3 −0
Running mvn validate does not show rules passed message though it should

My large, multi-module Maven project validation (Maven Enforcer plug-in) is playing tricks on me. moduleA> mvn validate correctly finds all modules runs enforcer on all of them displays co...

0 answers  ·  posted 10mo ago by LAFK‭

75%
+4 −0
How to make Husky run git hook?

How to make Husky run git hook? I have a working git hook, prepare-commit-message, but the moment Husky was installed, the hook stopped working. Not finding much luck, I then tried to make it a "H...

1 answer  ·  posted 10mo ago by LAFK‭  ·  edited 10mo ago by Alexei‭

87%
+12 −0
For scripting what are the pros and cons of command line arguments versus capturing input at the start?

Let's say I have a script that needs the user to set X number of variables at the start. One can either Pass the arguments in on the command line. Start the program and then have the user input...

6 answers  ·  posted 3y ago by Charlie Brumbaugh‭  ·  last activity 10mo ago by Dirk Herrmann‭

71%
+3 −0
Load site based on cookie value in PHP

I need to load a site based on a cookie. I wrote code to validate that, like this. if(!isset($_COOKIE['cookie'])){ $domain = $_SERVER['SERVER_NAME']; setcookie('cookie', $cookie, time() ...

1 answer  ·  posted 2y ago by hajakutbudeen‭  ·  last activity 10mo ago by keyang‭

50%
+1 −1
Count the number of occurrences in a text string

If I have some text in a cell, how can I find the number of times another piece of text appears in it? For example, suppose A1 contains Peter Piper picked a peck of pickled peppers.. pick occurs 2...

2 answers  ·  posted 3y ago by pnuts‭  ·  last activity 10mo ago by Dirk Herrmann‭

66%
+2 −0
How can I return XML from BeforeSendRequest and AfterReceiveReply to the calling method in a thread-safe way?

We have a console application using the Azure WebJob SDK. The WebJob relies on a WCF service using SOAP, which it accesses through a DLL we wrote that wraps the auto-generated WCF types in somethin...

1 answer  ·  posted 10mo ago by Celarix‭  ·  edited 10mo ago by Alexei‭

84%
+9 −0
What is a good modern language to use for a Business Rules project?

This is a rather vague question, but I'm trying to solve a specific problem and I'm inexperienced in most of the potential solutions, so please forgive the inherent ambiguity. I have access to a d...

3 answers  ·  posted 3y ago by Sigma‭  ·  last activity 10mo ago by matthewsnyder‭

60%
+1 −0
Summing values formatted for a different locale

A couple of year ago a user of Super User reported difficulties with summing values purporting to be Euros imported to LibreOffice Calc in CSV format. In the Q the user does not mention the locale...

1 answer  ·  posted 3y ago by pnuts‭  ·  last activity 10mo ago by Wicket‭

60%
+1 −0
What is lifting state up in Flutter?

What does lifting state up in Flutter mean, and how does it work?

1 answer  ·  posted 10mo ago by tarhalda‭  ·  last activity 10mo ago by tarhalda‭

77%
+5 −0
Using DBUS and GTK in one perl program

Perl is by far the language I have the most experience with, and I have (big) parts of the functionality I want in the new program in existing programs. So I'm looking for a way to do this in perl,...

1 answer  ·  posted 10mo ago by Grove‭  ·  last activity 10mo ago by deleted user