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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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+1 −3
An HTML form in Hebrew is Right to Left in general but a select list inside it is Left to Right

My HTML form got dir="rtl" attribute and value and in desktop computer systems it appears Right to Left (RTL) but in my mobile device (OnePLus 6) with Android and DuckDuckGo browser, the form's HTM...

0 answers  ·  posted 3y ago by deleted user  ·  edited 3y ago by deleted user

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+0 −0
Can Drupal be used to develop native (non web) applications?

I have used Drupal since 2010 to create websites and I recall a few years back reading that it can be used to create smartphone applications (or something similar). Is this only the "web-integrate...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by corporat‭

70%
+5 −1
Freeing sub-process resources?

I'm using Python to invoke another program in a sub-process. I've noticed my memory sometimes gets so large as to crash the system, and I'm wondering if I'm not correctly cleaning up the memory som...

0 answers  ·  posted 3y ago by Hyperlynx‭  ·  edited 3y ago by Patol75‭

71%
+3 −0
How to retain a service's data between components in Angular 8 ?

I would like to maintain a log that is available to several modules in my Angular 8 system. So I created the following service: @Injectable({ providedIn: 'root' }) export class LogService { ...

1 answer  ·  posted 3y ago by nelson777‭  ·  last activity 3y ago by nelson777‭

77%
+5 −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...

0 answers  ·  posted 3y ago by Estela‭  ·  edited 3y ago by Estela‭

85%
+10 −0
What does the "\s" shorthand match?

I've seen some regular expressions (regex) using \s when they want to match a space, but I noticed that it also matches line breaks. Example: the regex [a-z]\s[0-9] (lowercase ASCII letter, follow...

1 answer  ·  posted 3y ago by hkotsubo‭  ·  last activity 2y ago by hkotsubo‭

62%
+3 −1
Reading contents of XML node

I'm writing some functions in C that parses a part of a XML file (using libxml), but instead of extracting the content of the XML node that has a specific name, it outputs a string that's not in UT...

0 answers  ·  posted 3y ago by southernisles‭  ·  edited 3y ago by Alexei‭

66%
+2 −0
How to start mysql in Manjaro from terminal?

I had installed mysql using the following command sudo pacman -Sy mysql Earlier, I was using Lampp(Xampp for Linux) where I could start using the command /opt/lampp/start start I am not sur...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

77%
+5 −0
Modern CSS for splitting form sections into columns

I have a mobile-only HTML contact form divided in source code into three sections; each section should contain fields by a different context. <!DOCTYPE html> <html> <head> ...

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

60%
+1 −0
Is there any breaking change in regard to TrustServerCertificate property of System.Data.SqlClient for .NET 5?

I have recently an issue at work after upgrading an ASP.NET Core 3.1 application to .NET 5. It worked correctly on all environments (e.g. PreProd, Prod) when targeting 3.1, but failed on Prod only ...

1 answer  ·  posted 3y ago by Alexei‭  ·  last activity 3y ago by Alexei‭

75%
+4 −0
How can I customize the default project templates, or create my own, in Android Studio 4.2.1

I want to remove a deprecated entry from the default build.gradle file as well as change the default layout of an empty activity to use Relative Layout instead of constraint. I'm using Android Stu...

0 answers  ·  posted 3y ago by TecBrat‭

81%
+7 −0
Why is this client code getting the wrong date for a few hours a day?

Our web site has a widget that displays some date-based information that we retrieve from some JSON-formatted data (one object per date). We get the current date from the environment, possibly adj...

2 answers  ·  posted 3y ago by Monica Cellio‭  ·  last activity 3y ago by hkotsubo‭

71%
+3 −0
How to copy a PostgreSQL database to another machine.

I have to debug an error which seems to only happen with some set of data present in our PostgreSQL database. I'd like to copy said database to my local machine so I can perform tests without affe...

1 answer  ·  posted 3y ago by Estela‭  ·  edited 3y ago by Alexei‭

62%
+3 −1
Is the concept of a PHP lint feasible?

When I review JavaScript files in various text editors (Visual Studio Code, Greasemonkey/Tampermonkey) I sometimes get notified about syntax errors. I never encountered this behavior with PHP file...

2 answers  ·  posted 3y ago by deleted user  ·  last activity 3y ago by nelson777‭

php
66%
+2 −0
Difference between puts and print for Array

I have an array friends = Array.new friends[0] = "Mad man" friends[1] = "hey" There's two ways to print it (using print or puts). At first I tried print print friends which gave: ["Mad...

1 answer  ·  posted 3y ago by deleted user  ·  edited 2y ago by Trilarion‭

75%
+4 −0
How to generate multi-line completions (code generation) with OpenAI?

I have finally received access to a trial account on OpenAI and I took it for a spin. My interest is with code generation, so first tried something simple using the playground: Q: generate a stand...

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

66%
+2 −0
How to manage decibel meter?

I had build an application using following source code (following the steps). package com.decibal.level; import androidx.appcompat.app.AppCompatActivity; import android.media.MediaRecorder; ...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

71%
+3 −0
Why content delivery networks often require a www. redirect?

Why do Content Delivery Networks are often developed in such a way that they would require adding a Cname value such as www. before example.com? I ask this after switching from one CDN (Cloudflare...

2 answers  ·  posted 3y ago by deleted user  ·  last activity 3y ago by corporat‭

33%
+1 −4
Did functional programming predated Object oriented programming or rather the opposite?

By "functional" I don't mean "procedural" (i.e. I don't mean to programming which is done solely or primarily with these data structures commonly known as "functions" but are actually procedures), ...

2 answers  ·  posted 3y ago by deleted user  ·  last activity 3y ago by nelson777‭

75%
+4 −0
What are the risks of using iFrame as a temporary migration step for an internal web application?

Overview Our development team is currently trying to develop and migrate a Web application that is split in two: legacy: ASP.NET MVC 5, jQuery, old-style JS programming overall "next": Angular...

1 answer  ·  posted 3y ago by Alexei‭  ·  last activity 3y ago by meriton‭

16%
+0 −8
Why most hosting providers support ticket systems allow text only (no formatting)? [closed]

Through the years I have "tasted" several website hosting companies; none of them had Markdown available in their support-ticket-systems (if all any formatting method available). Why is it? What's...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by Alexei‭

50%
+1 −1
Why are my EMA values ​​different from the ones on the website? [closed]

I wrote a program for calculating EMA, but my values ​​differ from the values ​​calculated on this site. My program: double[] x = Numbers();//array numbers int N = 5; double k = 2.0 / (N + 1...

0 answers  ·  posted 3y ago by kolaa‭  ·  closed 3y ago by Alexei‭

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+0 −0
When is information schema not needed and when is it indeed when migrating from one website hosting provider to another?

In some situations, could it be problematic to migrate a website's database (MySQL) from one website hosting provider to another without the information schema or with the information schema? In m...

0 answers  ·  posted 3y ago by deleted user  ·  edited 3y ago by deleted user

83%
+8 −0
How to set text-align for whole column of HTML table?

To start off, here is the complete HTML of a simple example table: <html lang="en-US"> <head> <title>Title</title> <style> table { width: 20em; ...

2 answers  ·  posted 3y ago by Olin Lathrop‭  ·  edited 3y ago by Alexei‭

62%
+3 −1
Is this a known design pattern: a piece of code is responsible for acting as a central proxy for data distributed in various places?

I have several classes (C_1...C_n) and their instances (I_1....I_m). I have a "Registry" R of these. There are several pieces of data (d_1...d_k) spread across various instances. This much is set ...

1 answer  ·  posted 3y ago by peey‭  ·  last activity 3y ago by Alexei‭

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 3y ago by Alexei‭  ·  last activity 30d ago by Michael‭

70%
+5 −1
How do I get the error message out of a requests exception?

I'm trying to log error messages from Requests exceptions. Example: try: make_web_request() except RequestException as ex: logging.error(ex) Example output: ERROR : ('Connection abo...

2 answers  ·  posted 3y ago by ajv‭  ·  last activity 3y ago by hoverhell‭

66%
+2 −0
Changing the font of an entire JTable column.

I know I can change the font of each cell individually by overriding getCellRenderer(row, col) in JTable but I want to be able to change the font of an entire column at once and, ideally, have the ...

0 answers  ·  posted 3y ago by cuzzo‭  ·  edited 3y ago by cuzzo‭

66%
+2 −0
Save migration info in separate DB schema

When creating a code-first solution in dot net core using Visual Studio, you manipulate the database by changing model classes and migrating the changes. I can set the schema for tables that I cre...

1 answer  ·  posted 3y ago by mcalex‭  ·  last activity 3y ago by Alexei‭

88%
+14 −0
How does Zalgo Text work, and how can I prevent my application from accepting it?

A Zalgo Text is something like this: T̃͟͏̧̟͓̯̘͓͙͔o̤̫͋ͯͫ̂ ̥͍̫̻͚̦͖͇̌ͪ̇ͤ̑̐͋̾̕i̢͖̩͙͐͑ͬ̄̿̍̚ͅn̵̢̼̙̳̒̄ͥ̋̐v̡̟̗̹̻̜͕̲ͣ̐ͤͤ͒́oͫ͂̆͑ͩ҉͇̰͚̹̠̫͔̗k̷̭̬̭͙̹̺̯ͩ̌̾̒̋̓ͤ͛͘͠e̥͙̓̄̕ ̵̫͈ͪţ̱̺̺̑̿̉̌͛̂̇h͙̣̬̓̂͞ę̡̲̟͎͉̟͛̓̉̆̉͘ ͬ̒...

1 answer  ·  posted 3y ago by hkotsubo‭  ·  last activity 5mo ago by hkotsubo‭

75%
+4 −0
Pros and Cons of different tacit systems?

As a big fan of tacit/point-free programming in general, I'm looking at different tacit programming systems for inspiration (for a language I'm creating). What are the advantages and disadvantages ...

0 answers  ·  posted 3y ago by Wezl‭  ·  edited 3y ago by Wezl‭

75%
+4 −0
Changing the font of a certain cell within a JTable

I am trying to change the font type and size in a JTable cell. Ive looked at tons of posts and while most don't produce stack traces, they don't seem to do anything either. Here is the code I curr...

1 answer  ·  posted 3y ago by cuzzo‭  ·  edited 3y ago by cuzzo‭

88%
+14 −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 3y ago by Lundin‭  ·  last activity 1mo ago by Lundin‭

53%
+5 −4
What is an example for a URI which is not a URL?

Every URL is a URI but not every URI is a URL is a saying I know from long ago, but what is an example for a URI which is not a URL (whatever the user agent would be - a web browser, a *nix utility...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by Wezl‭

37%
+1 −3
Separation of password cookies from all other types of cookies

When I clear my Google Chrome browser history I can clear both "Cookies and other site data" AND "passwords and other sign-in data". Clearing just one of the two would require me to re-login t...

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

80%
+6 −0
How can I test my front end for accessibility to the blind?

I'd like my web front end to be accessible, including to people who use screen readers. I know the basics about labels and alt text for images, but there are some areas where I'm not sure what a s...

1 answer  ·  posted 3y ago by Monica Cellio‭  ·  last activity 3y ago by Peter Cooper Jr.‭

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 3y ago by Silicomancer‭  ·  edited 8mo ago by Shree‭

50%
+3 −3
What is a typeless programming language?

I have read that several programming languages, listed below are considered "typeless": Forth Brainfuck B MUMPS BLISS Lucid BCPL I have shared this data with a programmer who clued that...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

77%
+5 −0
Is it worth using the Java Platform Module System in application code?

Is it worth using the Java Platform Module System introduced in Java 9 to structure application code? Given that the Java Platform Module System introduced in Java 9 doesn't manage dependency vers...

1 answer  ·  posted 3y ago by meriton‭  ·  edited 11mo ago by __blackjack__‭

33%
+1 −4
Convert .npy files in a directory to images (.png)

I have around 20,000 .npy files in a directory. That main directory has no subfolders:- Main_dir | |--1.npy |--2.npy |--3.npy |--........ The absolute file paths are stored ...

2 answers  ·  posted 3y ago by Neel_Gupta‭  ·  last activity 3y ago by hoverhell‭

77%
+5 −0
Warn of implicit cast in a function's arguments with GCC?

In the C program below, I make a mistake and call the function with (ld, ld) instead of (d, ld). #include <stdio.h> #include <limits.h> void print_int_long(int n, long l){ pri...

2 answers  ·  posted 3y ago by Quasímodo‭  ·  last activity 3y ago by Lundin‭

20%
+0 −6
When an FPS game player can look down on the character shehe plays [closed]

I seek help in finding a term common in game development, particularly 3D First Person Shooter games (not at all in 2.5D games such as Doom). I understand that 3D first person shooter games can be...

0 answers  ·  posted 3y ago by deleted user  ·  closed 3y ago by Lundin‭

44%
+2 −3
Why often times data compression causes data loss?

I understand data compression as making data structures nearer (if they are mere machine code without any abstract representation) or representing them in less and less abstract computer languages ...

2 answers  ·  posted 3y ago by deleted user  ·  edited 3y ago by deleted user

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 23d ago by Michael‭

28%
+0 −3
What makes a software module an "authentication" module?

As I don't have any significant experience with internationally-standard information security literature, I would like to ask here if some international information security organization took the i...

2 answers  ·  posted 3y ago by deleted user  ·  last activity 3y ago by nelson777‭

66%
+2 −0
How to work with current entity changes when working with @ngrx/store and @ngrx/entity?

I am fairly new to working with @ngrx pattern in Angular which is a state management pattern relying on Reactive Extensions. One of the convenient structures is @ngrx/entity which helps with manag...

0 answers  ·  posted 3y ago by Alexei‭

22%
+0 −5
Which body supervises country-specific internet associations and what designations it assigned to these? [closed]

I am trying to save my question that was deleted from "Webmasters StackExchange" for not being about "a problem in a website" which I published there anonymously ; below is a shortened, directly-in...

0 answers  ·  posted 3y ago by deleted user  ·  closed 3y ago by Alexei‭

81%
+7 −0
How can I find git branches where all branch-local commits are from specific people?

We have a bunch of dead branches in our git repository, and I'd like to clean them up. Ones that were merged (but not deleted at the time) are easy; we can see those in the branch list on Bitbucke...

2 answers  ·  posted 3y ago by Monica Cellio‭  ·  edited 3y ago by Alexei‭

77%
+5 −0
Is *nix a formal term?

How can one differentiate what is or is not a *nix operating system even if that operating system (or its core/shell/common-utilities) allegedly behaves like any "other" *nix operating system? Is ...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by r~~‭

60%
+1 −0
Backendly redirecting a user from a contact form webpage to a success webpage

On a CentOS Apache-MySQL-PHP environment I have a website with a simple HTML-PHP-CSS contact form; the contact form itself is working. This is how I backendly redirect a user from the contact form...

0 answers  ·  posted 3y ago by deleted user