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Q&A

General Q&A about programming, scripting, software design & architecture, process, tools, testing, and more.

71%
+3 −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 versi...

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

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 &lt;stdio.h&gt; #include &lt;limits.h&gt; void print_int_long(int n, long l){ pri...

2 answers  ·  posted 1y ago by Quasímodo‭  ·  last activity 1y 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 1y ago by deleted user  ·  edited 1y ago by deleted user

75%
+4 −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 recursivity in CTE checking values of all previous rows? I would need something like t...

3 answers  ·  posted 1y ago by artaxerxe‭  ·  last activity 1y ago by Peter Taylor‭

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 1y ago by deleted user  ·  closed 1y ago by Lundin‭

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 1y 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 1y ago by deleted user  ·  closed 1y 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 1y ago by Monica Cellio‭  ·  edited 1y ago by Alexei‭

75%
+4 −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 1y ago by deleted user  ·  last activity 1y ago by r~~‭

80%
+6 −0
How to properly deal with impersonation in a Web application? (security vs. usefulness for tech support)

Context Our team has begun migrating a pretty old internal application and one aspect that got my attention is the impersonation. This is implemented as follows: only administrators are allowed...

2 answers  ·  posted 1y ago by Alexei‭  ·  last activity 1y ago by meriton‭

50%
+1 −1
yyyy/mm/dd instead expected dd/mm/yyyy format in PHP-created-HTML output

I have an HTML-PHP-CSS contact form with a date field: &lt;input type="date" name="date" id="cf_input_date"&gt;&lt;/input&gt; The default value in this field is the W3C built-in default: dd/m...

1 answer  ·  posted 1y ago by deleted user  ·  last activity 1y ago by Peter Taylor‭

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 1y ago by deleted user

71%
+3 −0
How to tackle database migrations failure during application initialization on production systems?

Context My ASP.NET Core application got stuck in Production with a 5xx error. By inspecting the logs, I have noticed that a database error occurred during application initialization, namely a SQL ...

1 answer  ·  posted 1y ago by Alexei‭  ·  last activity 1y ago by misha130‭

60%
+1 −0
How to enable or disable a bunch of reactive form controls?

I want to conditionally disabled or not (enabled) a bunch of reactive form controls. However, I have noticed that neither enable or disable function has a boolean parameter to nicely conditionally ...

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

62%
+3 −1
PHP emails are sent when $message is a string, but not when its an array

I host my website on a CentOS-Bash, PHP and MySQL environment; my local email client is engined by Roundcube. I don't know almost anything about PHP nuances. While my web domain registration is do...

2 answers  ·  posted 1y ago by deleted user  ·  last activity 1y ago by manassehkatz‭

php
57%
+2 −1
Not obligating http:// or https:// in a url field of a contact form

I have a simple HTML-PHP-CSS contact form (no JavaScript) with an input type="url" field. Currently in 30/03/2021, the default behavior of input type="url" (by W3C design I guess) is to obligate t...

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

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 1y ago by deleted user  ·  last activity 1y ago by Alexei‭

81%
+7 −0
SQL timestamp for daylight saving day when clock goes 1 hour back.

On 25th October 2020 in Europe/Berlin clocks where set back from 03:00 AM to 02:00 AM to change from summer time (CEDT) to winter time (CET). Which means there is a 1 hour separation between 02:30...

1 answer  ·  posted 1y ago by Estela‭  ·  last activity 1y ago by hkotsubo‭

71%
+3 −0
PHP variables aren't expanded when inside HTML which is by itself inside PHP

I transfer emails from my Right To Left (RTL) contact form → to my local email box (powered by Roundcube). Emails reach my email box (inbox) just fine but I have a problem were PHP variables aren'...

1 answer  ·  posted 1y ago by deleted user  ·  last activity 1y ago by luap42‭

57%
+2 −1
Are JavaScriptless forms accessible?

I consider to make my website's contact form totally javascriptless (only HTML-PHP-CSS --- no JavaScript at all). No modals or alerts No prevent default No AJAX/AJAX/XHR/JHR No form disappear...

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

81%
+7 −0
What are field separators in operating-programming languages (such as Bash)?

The concept of field separator has some private cases in different operating system shells and their utilities (IFS on Bourne shell and derivates, RS on AWK and perhaps more) but I am having troubl...

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

66%
+2 −0
How do I configure log4net from an arbitrary data structure?

I'm used to working in Python, but my current project is in C#/.NET and uses log4net for logging. Out of the box, log4net uses an XML file for configuration. I dislike XML and want to use something...

1 answer  ·  posted 1y ago by ajv‭  ·  last activity 1y ago by Peter Taylor‭

75%
+4 −0
Is migrating emails from one hosting provider to another a trouble?

I rent a shared-hosting environment with CentOS-Bash, Apache, PHP, MySQL and a web-based IMAP email client (Roundcube) and some more tools, on which I host my personal website; I don't have Cpanel...

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

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 1y ago by .                                                .‭

50%
+0 −0
I don't want to setup DKIM, SPF and to do SMTP authentication ; an hosting-provider-email-box solves this but what if I want a domain-registrar-email-box instead?

On a shared hosting (CentOS-Bash) I have a website with a backend (PHP) - frontend CMS-agnostic contact form. I need to transfer emails sent via this contact form directly to an email address (I d...

0 answers  ·  posted 1y ago by deleted user  ·  edited 1y ago by deleted user

50%
+1 −1
Running remote scripts (cloud scripts) locally --- valid and securely as possible

I use CentOS with Bash and I would like to download, execute and delete the executed downloaded file (running a remote/cloud script locally). I often prefer to load my own shell scripts from my ow...

1 answer  ·  posted 1y ago by deleted user  ·  last activity 1y ago by Peter Taylor‭

66%
+2 −0
min-height for HTML form's submit buttons from a web accessibility standpoint

I am styling a simple HTML-PHP-CSS contact form and I have considered to give some min-height pixel value CSS style to the form's submit button. I ran a Google search with the query: min-height...

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

71%
+3 −0
Trying to create a POST request with Apache

I have tried many different ways to do this with apache but the server seems to not be receiving the data. Stacktraces are not being printed so I can only assume I have the request set up wrong for...

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

75%
+4 −0
How to prompt a user for an expanded variable in Bash?

I work with CentOS operating system and my only shell is Bash. I want to create a script which prompts a user with a question like "What is your web application root?" The user should answer dire...

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

77%
+5 −0
How to match standard email addresses with regex?

I want to match standard email syntax (lowercased English, numbers and perhaps also some hyphens and underscores) with regex for a sed operation that matches and changes a single email address insi...

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

50%
+0 −0
Creating a Right-To-Left, primarily-backend, HTML-PHP contact form

I host my website on a PaaS-modeled, shared hosting environment by SiteGround which is quite a well known hosting company with (as I believe) well-venerated email servers. I am trying to create ...

0 answers  ·  posted 1y ago by deleted user  ·  edited 1y ago by deleted user

81%
+7 −0
Multiple catches with almost the same code.

I find myself often writing code like this. try { // code } catch( FailedReadException const &amp; ex) { file.close(); std::cerr &lt;&lt; "Read failure " &lt;&lt; ex.readFailure() &lt;&...

2 answers  ·  posted 1y ago by Estela‭  ·  edited 1y ago by Ayxan Haqverdili‭

64%
+7 −3
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...

5 answers  ·  posted 2y ago by klutt‭  ·  last activity 1y ago by Lundin‭

81%
+7 −0
Update list based on presence of identifier in a second list

In C#, I have two lists and need to mark records in the first based on the second. Here's a sample: public class Vehicle { public string Make { get; set; } public string VIN { get; set;...

3 answers  ·  posted 2y ago by FrankLuke‭  ·  last activity 1y ago by Andrew Shepherd‭

50%
+0 −0
I need a term to search for contact form Software as a Service (SaaS) provider

There is this service for website owners which is a both an email server (Backend as a Service) and a comfortable GUI for creating contact forms (Frontend as a Service). Website owners who don't w...

0 answers  ·  posted 1y ago by deleted user  ·  edited 1y ago by deleted user

60%
+1 −0
What should healthcheck of an Web API application actually check?

I have to add health checks to a rather new application (Web API, not a microservice) and I and a colleague are not agreeing about what other systems I should include in the check. This application...

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

75%
+4 −0
How to reason about transaction isolation during development

Consider the following code: public class OnlineShoppingService { @Transactional public void cancelOrder(String id) { if (shipmentRepository.findShipmentForOrder(id) != null) { ...

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

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 1y ago by TextKit‭  ·  closed 1y ago by Alexei‭

16%
+0 −8
ELI5 these 9 methods to compare similar pictures – Hash, MD5, SHA? [closed]

Please compare and contrast – explain like I'm 5, in SIMPLE English – all 9 methods below? English isn't my first language.

0 answers  ·  posted 1y ago by TextKit‭  ·  closed 1y 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 1y ago by TextKit‭  ·  closed 1y 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 1y ago by Ayxan Haqverdili‭  ·  edited 1y ago by Lundin‭

18%
+0 −7
How can I crop white margins, when I print a 1 column Word document as 2 pages per sheet? [closed]

My Word document has just 1 column, and I don't want to convert it into 2 columns. When you command Word to print 2 pages per sheet, Word doesn't let you shrink the white margins. How can I improv...

0 answers  ·  posted 1y ago by TextKit‭  ·  closed 1y ago by Lundin‭

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 2y ago by Greg‭  ·  closed 2y ago by Alexei‭

75%
+4 −0
List what file(s) an identifier was declared in?

I'm using Doxygen to help me figure out some library code. There's an enum I know I need to use, but I don't know which file it's declared in. Searching for that identifier in Doxygen yields the p...

1 answer  ·  posted 2y ago by Hyperlynx‭  ·  last activity 2y ago by summea‭

66%
+2 −0
Is it possible to disable the "mysql: [Warning] Using a password on the command line interface can be insecure" warning?

For my purposes, it is secure enough to use passwords to execute MySQL commands on the command line, what I would like to do is disable the warning that says, mysql: [Warning] Using a password on ...

1 answer  ·  posted 2y ago by Charlie Brumbaugh‭  ·  last activity 2y ago by Alexei‭

88%
+14 −0
How should we share some content between two otherwise-independent git repositories?

We have two teams, dev and doc, and I'd like them to have shared access (via git) to a common subset of content. Specifically, I would like the examples that are used in the doc and that are scrip...

4 answers  ·  posted 2y ago by Monica Cellio‭  ·  last activity 2y ago by Monica Cellio‭

50%
+2 −2
Mocking tempnam() with vfsstream

How do I mock tempnam() with vfsStream for code that uses it to create temporary files (for example, in a PHPUnit test)?

1 answer  ·  posted 2y ago by tyteen4a03‭  ·  last activity 2y ago by summea‭

50%
+2 −2
What is REST and how different it is from HTTP? [closed]

Based on my understanding HTTP is something client and server speak in, I mean it is like a language for a server and client to communicate(not exactly a programming language). Then how to understa...

0 answers  ·  posted 2y ago by aditya98‭  ·  closed 2y ago by Alexei‭

44%
+2 −3
What is the latest, efficient way to create a login page in JAVA?

I am a noob Java programmer. I want to create a simple login page with just username and password. So I have to combine Java and HTML. While googling I found that Servlets do the job but people are...

1 answer  ·  posted 2y ago by aditya98‭  ·  last activity 2y ago by meriton‭

83%
+8 −0
What is CPU endianness?

I was fooling around with the following C code on my trusty old x86 PC: #include &lt;stdint.h&gt; #include &lt;stdio.h&gt; int main (void) { uint32_t u32 = 0xAABBCCDD; uint8_t* ptr = (u...

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