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Q&A

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

66%
+2 −0
How do I get an animation from another source playing through hovering?

I was tasked with an assignment where I should get a box to move to the 4 corners of the viewport by hovering on a button. Most of the code is already finished except for figuring out how to get th...

0 answers  ·  posted 12mo ago by General Sebast1an‭  ·  edited 12mo ago by General Sebast1an‭

22%
+0 −5
Ignore code paths

I try to ignore paths in the Codeql code scanning file. But every scan it seems that scanning doesn't ignore these files, do you have any tips?

0 answers  ·  posted 12mo ago by fadi‭  ·  edited 12mo ago by Alexei‭

70%
+5 −1
What does a variable followed by parentheses ("ptr()") mean?

What does ptr() mean in this code? #include&lt;stdio.h&gt; #include&lt;stdlib.h&gt; void PrintHello() { printf("Hello\n"); } int Add(int a, int b) { return a+b; } int main...

2 answers  ·  posted 1y ago by dumplings‭  ·  last activity 12mo ago by Martin Bonner‭

75%
+4 −0
WPF MVVM ListBox not updating

I am trying to combine MVVM in WPF using Microsoft.Toolkit.MVVM. Somethings are working as expected. The text boxes bind to fields and update in both directions. The button command executes and cha...

2 answers  ·  posted 12mo ago by FrankLuke‭  ·  last activity 12mo ago by elgonzo‭

40%
+0 −1
How To Verify Old Password in PHP? [closed]

I have a page to change the user password in my website, this page can only be used if the user have a logged in! The change password page have 3 inputs: Old Password, New Password and Con...

0 answers  ·  posted 12mo ago by rrenildopereiraa‭  ·  closed 12mo ago by Alexei‭

50%
+0 −0
How to get rid of HTML tags and convert entities in SQL Server?

I have to migrate a bunch of text from an old application into a new one. Some of these texts contain HTML tags and entities (HTML editor was used) and now they do not want to support this in the n...

2 answers  ·  posted 1y ago by Alexei‭  ·  last activity 12mo ago by gbjbaanb‭

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() ...

0 answers  ·  posted 1y ago by hajakutbudeen‭  ·  last activity 12mo ago by Mikesumiines‭

28%
+0 −3
C++ exit code -1073740940 [closed]

What means the exit code -1073740940 in C++?

2 answers  ·  posted 1y ago by always_improve‭  ·  closed 1y ago by Alexei‭

75%
+7 −1
How to avoid "exception is never thrown" when commenting out a line while debugging

I have a code block like this: try { ... x.foo(); // This is the line that forces us to have the try block ... } catch (ArrayIndexOutOfBoundsException e) { logger.error(e.getM...

1 answer  ·  posted 1y ago by klutt‭  ·  last activity 1y ago by anatolyg‭

60%
+1 −0
Tackling net::ERR_NAME_NOT_RESOLVED and timeout error on browser object creation when using Puppeteer

Used to work with PhantomJS. Want to upgrade to Puppeteer. Started with some code: "use strict"; const puppeteer = require("puppeteer"); const capture = async () =&gt; { let browser; try {...

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

71%
+3 −0
Why does pushing to one array affect all the arrays in my two-dimensional array?

I was trying to initialize a simple two dimensional array as follows: const arrays = Array(3).fill([]); However, when I tried to push an entry into one of the arrays, it seems like it gets push...

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

57%
+2 −1
How can the Caesar cipher be implemented in Java?

The Caesar cipher is a substitution cipher in which the letters of an ordered alphabet are cyclically shifted by a given number. A detailed description can be found e.g. here. Let u be the index o...

2 answers  ·  posted 1y ago by Holden‭  ·  last activity 1y ago by hkotsubo‭

42%
+1 −2
Mocking methods with arguments

Let's say I have this class I want to mock class A { public void add(T arg) { B b = A.getB(); U val = somefunc(arg); V ret = b.add(val); } } I have a spy o...

3 answers  ·  posted 1y ago by klutt‭  ·  last activity 1y ago by klutt‭

40%
+2 −4
unable to create databases in Ruby

I had installed Ruby. rvm install 2.6.6 I had Ruby which version was 3.0.0. I had removed it. Then, installed 2.6.6. When I try bundle install I got no error. When I tried following command...

0 answers  ·  posted 2y ago by deleted user  ·  edited 1y ago by Alexei‭

71%
+3 −0
Algorithmically generating the grid formed by the vertices of a dodecahedron (Hunt The Wumpus)

I am attempting to write a program to simulate Hunt The Wumpus in the K programming language. The game requires a grid that is created by the vertices of a Dodecahedron, which is cyclic and triangu...

2 answers  ·  posted 1y ago by Razetime‭  ·  edited 1y ago by Razetime‭

62%
+3 −1
Comparing two excel files with Python based on changes

I have two tables: Table1: Name Description Amount 123 Description123 123 456 Description456 456 789 Description789 666 101 Description777 101 133 De...

1 answer  ·  posted 1y ago by sfrow‭  ·  last activity 1y ago by ibmx‭

62%
+3 −1
How do I strip file extensions from URLs with H2O?

I'm trying to use H2O to serve a multi-file PHP website without routing—just having a separate PHP file for every page. The relevant part of my H2O config currently looks like this: paths: "/":...

1 answer  ·  posted 1y ago by Ullallulloo‭  ·  last activity 1y ago by jminer‭

71%
+3 −0
Conditions which always matches returns no result with CTE

I have the following scenario (in MySQL 8): CREATE TABLE `steps` ( `id` int NOT NULL AUTO_INCREMENT, `number` varchar(30) DEFAULT NULL, `parent_number` varchar(30) DEFAULT NULL, `timestamp` ti...

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

42%
+1 −2
How to create an object, call one of it's methods and pass it as an argument as a oneliner?

Assume I have this class Foo class Foo { private int x; void setX(int x) { this.x = x; } } And I have a Junit test like this: Bar bar; @BeforeEach void setu...

3 answers  ·  posted 1y ago by klutt‭  ·  last activity 1y ago by Alexei‭

62%
+3 −1
DST disrupting rsync twice a year

I'm facing rsync full syncs every once upon a time, I think it's because DST, notice an hour of difference: $ ls -l tier2/VIDEO-2020-06-17-15-10-27.mp4 /Volumes/KINSTON2/dat/laptop_kinstones/tier2...

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

72%
+6 −1
How to unittest method that involves contacting remote servers?

Let's say I have this class: class myService { private boolean foo(T arg) { return arg == 42; } public Response bar(U arg) { if(foo(U.field)) { return Response.st...

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

66%
+2 −0
How to check if a ldap username is valid without contacting the active directory via ldap?

I have some code connecting to an active directory via ldap. Something like this: public Response add(User user) { try { LDAPConnectionPool ldapPool = ldapConnectionPool.getPool();...

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

77%
+5 −0
How to properly use malloc?

I have seen this construct quite a lot: int *p = (int*) malloc(n * sizeof(int)); Is this how it should be? What is the proper way to use malloc? I have also seen this: int *p = malloc(n * size...

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

40%
+2 −4
How do I properly format a String for parsing with a com.google.gson.JsonParser

I am trying to check a JSON array for a certain element. However, when I try to instantiate a JsonElement to search the list for: JsonElement builderElement = JsonParser.parseString( "{\"disc...

0 answers  ·  posted 1y ago by cuzzo‭  ·  edited 1y ago by Stephen C‭

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 2y ago by deleted user  ·  edited 1y ago by Trilarion‭

71%
+3 −0
How to allow sign-ups without confirmation as an exception using devise confirmable?

I use the devise authentication gem for a Rails application and it's very convenient. Typically I want my users to confirm their registration by email. Therefore the User model looks like class U...

1 answer  ·  posted 1y ago by Trilarion‭  ·  last activity 1y ago by ArtOfCode‭

77%
+5 −0
Continuously read from piped input using Vim

In Vim, it's possible to tell it to read from stdin instead of a file, by using vim -. This is so that you can pipe the output of one command into Vim, to view/edit it there. The problem I'm facin...

2 answers  ·  posted 1y ago by Hyperlynx‭  ·  last activity 1y ago by InfiniteDissent‭

77%
+5 −0
noreturn function with non-void return type

Is it legal ISO C to declare a function as noreturn with a non-void return type (but of course not actually returning)? As far as I can read from the standard, it seems legal. Example: noreturn ...

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

80%
+6 −0
Is it OK to use scanf with a void pointer?

I've created a function that calls scanf passing a void pointer as argument: void read(const char *format, void *p) { scanf(format, p); } And tested it with different types: int n; read...

2 answers  ·  posted 1y ago by hkotsubo‭  ·  last activity 1y ago by Lundin‭

80%
+6 −0
When does it not work to dereference the pointer for sizeof during malloc?

Background This is kind of a subquestion to How to properly use malloc? When allocating, there are basically two common ways of using the sizeof operator: int *p; p = malloc(n * sizeof *p); /...

1 answer  ·  posted 1y ago by klutt‭  ·  edited 1y ago by hkotsubo‭

77%
+5 −0
Is an ORDER BY required when looping through MySQL records with LIMIT?

Let's say I have a table with 10,000 rows and instead of selecting all of the rows at once I select 1,000 at a time like LIMIT 0,1000 LIMIT 1000,1000 etc. Without an ORDER BY statement the or...

1 answer  ·  posted 2y ago by Charlie Brumbaugh‭  ·  edited 1y ago by Alexei‭

66%
+2 −0
Why is my last input box not centering (class: powerwall-battery-input)?

I found a form I wanted to duplicate on a roof construction website. All my input boxes are centered except the last one that's a bit off and I cannot figure out why. Here is my code: HTML &lt;...

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

77%
+5 −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...

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

75%
+4 −0
Best practices in setting up a development & production environments

I am developing a web app that is tied to a database. My codebase is stored on a private GitLab instance. I would like to set up a workflow that would look something like this: I have a developm...

1 answer  ·  posted 1y ago by Mu3‭  ·  last activity 1y ago by meriton‭

71%
+3 −0
Detecting if a user has stopped interacting with a web view for a certain time

I am interested in finding out all the aspects I need to cover in order to correctly assess if a user has stopped interacting with a web page. So far, I found the following: Idle Detection API -...

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

80%
+6 −0
Are static pointers implicitly initialized to NULL?

Consider this code: #include &lt;stdio.h&gt; int main(void) { static void *ptr; if(ptr == NULL) puts("It's NULL!"); } I wonder if this is guaranteed to print "It's NULL!" I know ...

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

77%
+5 −0
How to prevent token from being refreshed

I have an Angular application. The frontend has a mechanism that periodically fetches some information like this: ngOnInit(): void { setInterval( () =&gt; { this.http.get(... ).sub...

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

83%
+8 −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...

4 answers  ·  posted 1y ago by Lundin‭  ·  last activity 1y ago by klutt‭

60%
+1 −0
Preloading some data at application startup as fast as possible

I am caching some very static information (changes once per day) in my ASP.NET Core application. This is normally done when needed ("lazy"). One such cache item is a 50K list of items that are tak...

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

66%
+2 −0
What are the drawbacks of using data snapshot testing?

Our team is finally focusing on writing more automatic testing and one of my ex-colleagues recommended to try out the Verify library. The tool does the following: runs the test and compares the...

1 answer  ·  posted 1y ago by Alexei‭  ·  last activity 1y ago by Derek Elkins‭

66%
+2 −0
How to write database friendly code when using an ORM?

There are a lot of articles and presentations that show little love for ORMs. This is mainly because some queries are so complex and heavy on the database that they lead to significant issues in p...

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

50%
+2 −2
Alternative to Google Adsense [closed]

I'm starting a small site with some online tools. Tried to include Google Adsense but I initially got rejected because the site was still on construction. Yet I've seen in the forums that they are...

0 answers  ·  posted 1y ago by nelson777‭  ·  closed 1y ago by Alexei‭

71%
+3 −0
Why static code analyzers such as SonarQube indicate a high code complexity for switch statements?

During a presentation of a pipeline configuration, a colleague showed a SonarQube integration and one of its reports. A warning was caused by overrunning the max value for the code complexity thres...

2 answers  ·  posted 1y ago by Alexei‭  ·  last activity 1y ago by Derek Elkins‭

50%
+0 −0
Migrating HTML strings to a more secure alternative

Our team will have to migrate an old application to use a new tech stack. One of the features involves the usage of HTML editors which serialized the content as HTML and I am able to see valid HTML...

1 answer  ·  posted 1y ago by Alexei‭  ·  last activity 1y ago by r~~‭

37%
+1 −3
Cannot write multipart message to byte array [closed]

I'm trying to write a MIME message to the console. ByteArrayOutputStream out = new ByteArrayOutputStream(); MimeMultipart replyMsg = mdnCreator.createMDNData(); replyMsg.writeTo(out); out.close...

0 answers  ·  posted 1y ago by artaxerxe‭  ·  closed 1y ago by Alexei‭

77%
+5 −0
bootstrap : how to align text with a button inside a grid

I have this bootstrap code (grid) &lt;div class="container p-3 center"&gt; &lt;div class="row"&gt; &lt;div class="bg-light border-bottom border-secondary border-top col-6 te...

0 answers  ·  posted 1y ago by meneguzzo68‭  ·  edited 1y ago by Alexei‭

66%
+2 −0
Rationale of using database-level transactions inside a store procedure when application layer already manages a transaction

One of the legacy applications my team has to maintain has almost always this pattern for dealing with data modification: try { // get the connection // begin transaction // optional...

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

75%
+4 −0
What are the disadvantages of using auto mapper libraries?

I have noticed that lots of projects (both in real-world and within online courses) use Automapper to map domain models to view models, API models. The main advantage seems to be convenience by re...

2 answers  ·  posted 1y ago by Alexei‭  ·  edited 1y ago by Alexei‭

66%
+2 −0
Collapsing AppBar with two Toolbars

I am trying to create an app with two toolbars on top and a specific collapsing/expanding behaviour on scrolling. See the mockup to get a deeper understanding of what I'm trying to achieve: I fo...

0 answers  ·  posted 1y ago by BenjyTec‭

80%
+6 −0
When stored procedures are preferred over application layer code?

A person I used to work with several years ago was hired to rewrite a product using a .NET-based modern tech stack. One of the aspects that stroke me was that he believes that the product should mo...

2 answers  ·  posted 1y ago by Alexei‭  ·  last activity 1y ago by Derek Elkins‭