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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)
60%
+1 −0
cpulimit and sensors

I'm using GNU/Linux. I'd need some program or script or solution which would wrap make so that it would launch cpulimit on g++ processes in order to be nice to sensors output. Or, more genericall...

0 answers  ·  posted 3y ago by .                                                .‭

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
Highlight the maximum value per row across multiple columns

An as yet unanswered OpenOffice Calc - Highlighting the higest value in multiple columns posted by Rui on Super User from early this year asked whether a condition was possible to: fill with a c...

0 answers  ·  posted 3y ago by pnuts‭  ·  last activity 3y ago by pnuts‭

66%
+2 −0
Will my implementation of a Spring Boot app work after being deployed on the Internet?

Say I want to implement a very basic group chat application. I use the H2 database, a user class, a controller, and a text file in the Resources folder that stores the chat texts. All texts would b...

1 answer  ·  posted 3y ago by sonofel‭  ·  last activity 3y ago by Moshi‭

83%
+8 −0
Should I cast to (void) when I do not use the return value

I saw at least one compiler (Codewarrior for HC12) warn me if I use a function without using it's return value. Other compilers (clang/gcc) do not issue a warning though, even when using the std=90...

3 answers  ·  posted 4y ago by Kami‭  ·  edited 3y ago by Monica Cellio‭

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 3y ago by Lundin‭  ·  last activity 9mo ago by Lundin‭

50%
+0 −0
Why some items aren't clickable in RecyclerView?

if (type=="dialer") { String timestamp = list.get(position).get(Constants.DATE); holder.txtTimestamp.setVisibility(View.VISIBLE); holder.imgDelete.s...

0 answers  ·  posted 2y ago by Anonymous‭

71%
+3 −0
Credentials for multiple tenants with Azure.Identity

Situation: I have an Azure account which has management permissions for various subscriptions in various directories (tenants). I have a GUI tool to do various management tasks whose details are ir...

0 answers  ·  posted 2y ago by Peter Taylor‭

60%
+1 −0
What input functions can I use in TIO's PHP?

Try It Online! is an online interpreter for many supported languages, including PHP. I'm trying to solve coding challenges using the language, specifically "Hello, {name}!". In PHP, you can litera...

1 answer  ·  posted 2y ago by General Sebast1an‭  ·  last activity 2y ago by hkotsubo‭

82%
+12 −1
What is the difference between operator precedence and order of evaluation?

When doing something simple such as this int a=1; int b=2; int c=3; printf("%d\n", a + b * c); then I was told that operator precedence guarantees that the code is equivalent to a + (b * c)...

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

33%
+0 −2
How do I find all the tables in a database that don't have a specific column?

I need to add one column with the same name to all of the tables in my database, how can I find which tables don't currently have a column with that name?

1 answer  ·  posted 3y ago by Charlie Brumbaugh‭  ·  last activity 3y ago by Charlie Brumbaugh‭

80%
+6 −0
How are integers interpreted in contexts that expect a date?

I found a confusing construction in several stored procs in an MS SQL 2008 R2 database: DATEADD(dd, 0, DATEDIFF(dd, 0, some_date)) As I understand it, these are the relevant function signatures: D...

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

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+6 −0
How to do "out-of-source" build properly with cmake?

There are two broad types of build environments - in-source and out-of-source. "In-source" means the compiled files will appear in the same directory as source files. "Out-of-source" means there is...

2 answers  ·  posted 3y ago by anatolyg‭  ·  last activity 3y ago by alex‭

77%
+5 −0
What would the pros and cons of storing the compiled CSS output of SASS in version control?

If one is using SASS to build a websites CSS and using version control one can either, Keep both the SASS and the resulting CSS files in version control. Only storing the SASS files in version con...

4 answers  ·  posted 3y ago by Charlie Brumbaugh‭  ·  last activity 3y ago by ben‭

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+6 −0
Interpreted language: What is its benefit for being written in that way ?

Whenever I search in google why a specific language is interpreted language, I get differences between compiled languages and interpreted languages but nowhere the benefit for being interpreted rat...

3 answers  ·  posted 3y ago by aditya98‭  ·  last activity 3y ago by Olin Lathrop‭

50%
+0 −0
Copy a sparse matrix with removal of blanks

A user of Web Applications gave the following as an example: https://docs.google.com/spreadsheets/d/1nPTBFXaIgpruPgNoWFSBUL2yKaibjeNJNExhnHVr8LE/edit#gid=0 and asked: How do I read a long ro...

0 answers  ·  posted 3y ago by pnuts‭  ·  last activity 3y ago by pnuts‭

22%
+0 −5
Why do you need virtual machines in these examples? [closed]

I added the numbering. It's a virtual machine. Basically, it's one or more computers pretending to be one or more computers. Believe it or not, this is incredibly useful. Say you have som...

0 answers  ·  posted 3y ago by TextKit‭  ·  closed 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

66%
+2 −0
pod 0.1.0-dev not accepted for required version 0.1.0 (without -dev suffix)

I have following setup: flutter plugin with an example app the plugin depends on a native library (flutter_plugin.podspec contains s.dependency 'native-lib', '0.1.0') for local development I pull ...

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

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

50%
+0 −0
Submitting a form via XHR/AJAX causes partial data arrival to email inbox (only HTML without input)

I have a simple HTML-PHP contact form with some CSS. I desire to prevent the default behavior of the form which leads the user into a blank PHP page after submission, and, to have the form being s...

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

75%
+4 −0
How can I generate documentation from comments in SQL DDL?

I have some SQL scripts that contain DDL to create tables and schemas for a database. I'd like to be able to comment this SQL and then use those comments to generate output documentation (in HTML)...

0 answers  ·  posted 3y ago by Monica Cellio‭  ·  edited 3y ago by Monica Cellio‭

63%
+10 −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 3y ago by theabbie‭  ·  edited 9mo ago by tripleee‭

40%
+0 −1
How do World Wide Web interactions happen in a general level? [closed]

I understand that any World Wide Web interaction works this way: Stage 1: Client (human or software) ⟶ User agent ⟶ HTTP/S web-server request (with an unresolved domain) Stage 2: ISP-initiated Rou...

0 answers  ·  posted 3y ago by deleted user  ·  last activity 3y ago by Alexei‭

web
62%
+3 −1
Are there practical reasons for designing a method-only class/object?

Are there practical reasons for designing/implementing a method(s)-only class/object? Follow-up background notes: This question is for languages that are not exclusively Object-Oriented, for exam...

3 answers  ·  posted 2y ago by CodeFarmer‭  ·  last activity 2y ago by hkotsubo‭

37%
+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

83%
+8 −0
How do I find the order that yields the shortest path?

The Problem I have a path optimization problem that in some ways reminds me of the Traveling Salesman Problem, but differs in some key respects. I have a group of items that need to be used by a m...

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

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
What are the factors to consider when deciding to split ORM queries or use eager loading?

I have extensive working experience with Entity Framework ORM and have noticed two major ways of writing LINQ (LINQ2SQL): lot of eager loading: the most prevalent, uses (lots) of Includes to eag...

0 answers  ·  posted 3y ago by Alexei‭

27%
+1 −6
How can I combine every (number) of pictures and create multiple panorama images, just once? [closed]

Pre-suppose I have pictures numbered 1 to 400. I want to simultaneously combine every 4 pics in 1, so that I end up with 100 collages. Picture 1-4, 5-8, 9-12 ... will be combined. Indubitably it's...

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

83%
+8 −0
Is `uint8_t` always an alias for a character type if it exists?

Is uint8_t guaranteed to be a character type if it exists? Will using a uint8_t* to examine bytes of an object cause violation of the strict aliasing rule? Is the following legal code: #include &l...

1 answer  ·  posted 3y ago by Ayxan Haqverdili‭  ·  edited 3y ago by Lundin‭

71%
+3 −0
In MySQL is there a limit to the number of keys in a IN() clause?

I have a PHP program that does a SELECT and then updates some of the values based on an algorithm. Rather than updating one row at a time UPDATE example_table SET COLUMN_A = 1 WHERE primary_k...

2 answers  ·  posted 3y ago by Charlie Brumbaugh‭  ·  last activity 3y ago by Alexei‭

77%
+5 −0
Search tree supporting efficient bulk sequential insert

For holding ordered sets of keys, there are well-known data structures (the red-black tree, for example) that support O(log(n)) lookup and insertion algorithms. Of course this means that there triv...

0 answers  ·  posted 3y ago by r~~‭  ·  edited 3y ago by r~~‭

42%
+1 −2
How to add to the value of one cell an amount that depends upon the range of a different cell?

A user of Web Applications asked how to: +1 when the value is >=5, +2 when the value is >=10, +3 when the value is >=15, +4 when the value is >=20, +5 when the value is >=25...

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

50%
+2 −2
Splitting a large HTML file into two or more HTML files without JavaScript

I am developing a modular HTML-PHP-CSS no-JavaScript (JavaScriptless) contact form and the HTML is becoming increasingly large, around 80 lines (and could easily grow to be significantly larger as ...

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

50%
+0 −0
A standard about content types when creating a web shop with Drupal

I would assume the following content types would be standard when creating a web shop with Drupal but maybe I am wrong: Home page Article page Product page Service page Another page Are t...

0 answers  ·  posted 3y ago by deleted user

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

75%
+4 −0
dig -6 works but dig -4 does not

I can't get a response from IPv4 dig on my server but I can get one from IPv6 dig. See the below output: $ dig +short myip.opendns.com a @resolver1.opendns.com # Doesn't return anything, this used ...

1 answer  ·  posted 3y ago by cobertos‭  ·  last activity 3y ago by Canina‭

75%
+4 −0
Generate SIGSEGV without undefined behaviour.

In order to test that coredumps are generated and that they contain useful information which can be retreived with gdb I need to generate a SIGSEGV. Or anything else which causes a coredump. The co...

1 answer  ·  posted 3y ago by Estela‭  ·  last activity 3y ago by Lundin‭

71%
+3 −0
Include a Blazor Webassembly project into an existing ASP.NET Core project

When creating a new Blazor Webassembly project, there is a checkbox ASP.NET Core hosted where if selected will create three projects at once, a blazor webassembly project, an ASP.NET Core project, ...

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

75%
+4 −0
How to define custom configurations in new-style .csproj?

Problem I'm trying to update some projects from old-style .csproj: <?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.mi...

1 answer  ·  posted 3y ago by Peter Taylor‭  ·  last activity 2y ago by Peter Taylor‭

42%
+1 −2
redirect to "main" code in Ruby using Ctrl

In Android Studio, when I click on a variable. It redirects me to where the variable was declared. Even, when coder writes lot of code than, it becomes hard to find "main" object by scrolling. Rub...

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

50%
+0 −0
Loss of precision when concatenating an exchange rate with a string

In response to a Q on Web Applications [WA] the asker self-answered with: =CONCATENATE("@ £/€ rate: ",text(J21,"0.00000")) The issue was that, with "in a cell J21 I have a set value 1.10000":. ...

0 answers  ·  posted 3y ago by pnuts‭  ·  last activity 3y ago by pnuts‭

64%
+9 −4
Is omitting braces for single statements bad practice?

Consider this code: while(arr[index] != 0) index++; vs while(arr[index] != 0) { index++; } Personally, I prefer the first. The fact that the braces are not needed makes them -- u...

6 answers  ·  posted 3y ago by klutt‭  ·  last activity 9mo ago by H_H‭

71%
+3 −0
How do I redact values when Save()ing a yaml structure with YamlDotNet?

I handle several projects that use yaml files for configuration, and load them with YamlDotNet. It is sometimes useful to log the effective configuration when the program starts, to aid future debu...

0 answers  ·  posted 3y ago by ajv‭  ·  edited 3y ago by Troy‭

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

22%
+0 −5
What are the types of contact forms?

I get the impression that there are two general types of contact forms: A regular contact form where all fields are in one webpage ; such form might be very long for a potential customer ("too m...

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

44%
+2 −3
Help me understand why python3 string.format() raises Attribute error [closed]

I'd like some help understanding why the third call to print() raises AttributeError: 'NoneType' object has no attribute 'format' from os import path import inspect def myfunction(): pri...

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

66%
+2 −0
Search paths where all nodes are in a relationship with same node

Using the below graph as an example: I am trying to determine all Persons which are_sons of Persons all born in the same country. Is there an elegant way to achieve this with Cypher?

1 answer  ·  posted 3y ago by Guilherme Costa‭  ·  last activity 3y ago by r~~‭

80%
+6 −0
How to find out which packages target .NET 3.1 in a .NET 5 application?

After upgrading a Web application from ASP.NET Core 3.1 to ASP.NET Core 5.0, it worked fine on an existing server. However, when deployed on a server that had only .NET 5.0 installed, the applicat...

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