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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)
80%
+6 −0
Are there any downsides related to using Maybe or Optional monads instead of nulls?

I have recently stumbled across the Maybe (or Optional) modal usage in .NET Code: example code or this one example article Based on everything I read, there are multiple advantages on relyi...

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

71%
+3 −0
Retrieve user details from service in Angular

Angular 12; .NET Core 3.1 Following a code-maze tutorial, I have a working authentication (registration/login) service using .NET Core Identity. After login, I would like to add 'username' data ...

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

80%
+6 −0
How kill a child process without read() hanging in the parent process?

There is an external program I'm calling from within my C/C++ program, by using fork() and execl(), and redirecting the stdio with dup2() to be able to read the output from the external program. I...

1 answer  ·  posted 2y ago by sktpin‭  ·  edited 2y ago by Lundin‭

42%
+1 −2
&lrm; character jumbles text and this can be confusing when working with many articles

I often work bidirectional text in content management systems and often that text has parenthesis (()) or other textual wrappers flipping after an English text which is preceded in itself by some R...

0 answers  ·  posted 2y ago by deleted user

42%
+1 −2
Objection CLI - SVM Conception - Freezing prompt

Now I build a Python script to execute automaticaly a dynamic analysis on apk and I block because I use this library and call objection. When I run my script, the objection command creates an inst...

0 answers  ·  posted 2y ago by Link213‭  ·  edited 2y ago by Alexei‭

36%
+2 −5
What problem does innerHTML solves?

I understand that innerHTML does all the following actions: It makes the element we work on (or even the entire DOM tree that we work on if that element is <body>) to be copy-pasted into a...

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

22%
+0 −5
Why I am unable to find a class after implementing library also?

I had found a better way to plot in Java. int n = Integer.parseInt(args[0]); // the function y = sin(4x) + sin(20x), sampled at n+1 points // between x = 0 and x = pi ...

0 answers  ·  posted 2y ago by Anonymous‭  ·  edited 2y ago by Anonymous‭

28%
+0 −3
How to plot in C++?

I was trying to plot using following lines in C++. #include "koolplot.h" int main() { plotdata x(-6.0, 6.0); plotdata y = sin(x) + x/5; plot(x, y); return 0; } When I was...

0 answers  ·  posted 2y ago by Anonymous‭

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

22%
+0 −5
Why margin isn't working in SVG for path?

<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"> <svg version="1.1" id="Capa_1" x="0px...

0 answers  ·  posted 2y ago by Anonymous‭  ·  edited 2y ago by Alexei‭

36%
+2 −5
What is the main difference between event delegation to other event handling patterns in JavaScript?

I define a software event as any state of a program to which we can probably respond. In JavaScript, how does event delegation differs from more simple and probably more common event handling patt...

1 answer  ·  posted 2y ago by deleted user  ·  edited 2y ago by Alexei‭

60%
+1 −0
How does PathData work?

What is pathData? I was thinking to convert SVG to XML. I found it. In the code, I had seen that android:pathData="M 64 2 C 98.2416544895 2 126 29.7583455105 126 64 C 126 98.2416544895 98.2416544...

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

57%
+2 −1
Hash sum mismatch (only for openjdk-11-jdk)

I was installing Java yesterday. I had faced lot of problem. I had fixed most of them. But I had changed Hash that's what I think. I don't remember which command I had executed since I had executed...

1 answer  ·  posted 2y ago by Anonymous‭  ·  edited 2y ago by Alexei‭

22%
+0 −5
Adding support on mathematical expressions

MarkFuncs has really gotten huge progress, at least in my eyes, and now, I want to make math possible in the language. Background MarkFuncs is a programming language that I have been working on f...

0 answers  ·  posted 2y ago by General Sebast1an‭  ·  edited 2y ago by Lundin‭

75%
+4 −0
Get the length of a slice from a multi-dimensional array

If I have a one-dimensional array, I can get the length of it quite easily: var x = moves.Length(). However, if the array is multi-dimensional, .Length() returns the total number of elements. If ...

2 answers  ·  posted 2y ago by FrankLuke‭  ·  last activity 2y ago by FoggyFinder‭

60%
+1 −0
WARNING: environment variable DISPLAY is not set (netbeans)

I was trying to install Netbeans in Xubuntu. I had installed Netbeans using Snapd. sudo snap install netbeans --classic I was trying to start Netbeans then I got an error which was looking like...

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

60%
+1 −0
can't find git repo (library)

Could not find com.github.Kunzisoft:Android-SwitchDateTimePicker:1.9. Required by: project :app Search in build.gradle files I was trying to use the library. I had searched for 2.1, 2.0 a...

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

33%
+0 −2
Why comma is expected for auto_increment?

query = "CREATE TABLE "+TABLE+" ("+COLUMN1+" INTEGER PRIMARY KEY NOT NULL AUTO_INCREMENT, "+COLUMN2+" VARCHAR(255), " + COLUMN3+" VARCHAR(255), "+COLUMN4+" TEXT, "+ COLUMN5+" VARCHAR(255)...

1 answer  ·  posted 2y ago by Anonymous‭  ·  edited 2y ago by Alexei‭

66%
+2 −0
What's the better way to store base64 in SQLite Database?

What's the better way to store base64 in SQLite Database? I was thinking to put base64 as TEXT since base64 has lots of chars. CREATE TABLE name (id INTEGER PRIMARY KEY AUTO_INCREMENT, image TEXT)...

1 answer  ·  posted 2y ago by Anonymous‭  ·  edited 2y ago by Anonymous‭

60%
+1 −0
Why is the switch statement not executing the correct case blocks?

In the code below, the value of order variable should change according to i's value: String order; switch (i){ case 0: order = CallLog.Calls.DATE + " DESC "; contactViewAda...

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

40%
+0 −1
How to load two or more files in one AJAX call?

In my browser's JavaScript console I can add to the <body> element one file (index.html) with the following AJAX code: const whereToLoad = document.querySelector("body"); const ajax = new X...

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

57%
+2 −1
How to append HTML to the DOM with JavaScript?

I have a .html file containing only the following data, and I keep that file on top of my website's directory. <link rel="stylesheet" href="./css/mobile_general_structure.css"></link> ...

2 answers  ·  posted 2y ago by deleted user  ·  last activity 2y ago by Ullallulloo‭

60%
+1 −0
Why ArrayList is always same value in only Adapter?

This is the worst bug I have ever seen.. I was fetching CallLogs following way. ArrayList<HashMap<String, String>> callLog= new ArrayList<>(); HashMap<String, Strin...

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

50%
+0 −0
What should I use instead of managedQuery?

managedQuery is recently deprecated. ManagedQuery was used for using Cursor. What should I use since managedQuery was deprecated? Without it, I can't work with Cursor. So there must be alternative ...

1 answer  ·  posted 2y ago by Anonymous‭  ·  edited 2y ago by Alexei‭

36%
+2 −5
What are the disadvantages of using static methods in Java?

I was using static method few moments ago. But I noticed that I was returning a variable using that static method. According to the article, Static is a keyword that identifies the class-related...

4 answers  ·  posted 2y ago by Anonymous‭  ·  last activity 2y ago by hkotsubo‭

60%
+1 −0
event_start always returning contact number in android

Why ContactsContract.CommonDataKinds.Event.START_DATE always returning contact number. The number is available in Google Contacts. Here what I am doing... Cursor c; if (contactID==""...

0 answers  ·  posted 2y ago by Anonymous‭

50%
+0 −0
What's the alternative of "ContactsContract.Contacts.LAST_TIME_CONTACTED"?

What should I use instead of ContactsContract.Contacts.LAST_TIME_CONTACTED? According to documentation, LAST_TIME_CONTACTED variable was deprecated. Even it was written in ContactsContract.class /...

0 answers  ·  posted 2y ago by Anonymous‭  ·  edited 2y ago by Anonymous‭

50%
+0 −0
Executing a PHP HTML-CSS container on top of various content management systems

I have created two PHP modules, one is a contact form module and one is a a sticky "call now" module. I can access the contact form by example.com/contact_form.php but in contrast, example.com/cal...

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

71%
+3 −0
What does android:ems do?

What does ems in xml do? I saw that I was using following line in EditText. But, I never thought what it does. I was trying to check what actually it does by removing the line. I couldn't see any d...

1 answer  ·  posted 2y ago by Anonymous‭  ·  edited 2y ago by Alexei‭

60%
+1 −0
Find image for contact list in Android Java

How to get image of contact list? I was using cursor to get contact list. Here how it looks like. ArrayList<HashMap<String, String>> contactList = new ArrayList<>(); Has...

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

25%
+0 −4
Git deployment vs SFTP deployment [closed]

I personally use git for deploying my hobby projects into cloud like Heroku. I came across the concept of sftp for uploading files. Now please differentiate these two deployments like when to use w...

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

60%
+1 −0
How can I export metrics from Angular frontend to be read with Prometheus ?

How can I monitor an Angular frontend with Prometheus? I was able to create metrics for my Node.js API using the express-prometheus module. But I can't find any Angular/Prometheus integration. Basi...

0 answers  ·  posted 2y ago by nelson777‭  ·  edited 2y ago by Peter Mortensen‭

37%
+1 −3
What's the better way to deal with deprecated feature?

It's a very old question came to my mind. Whenever I start building some applications for Android using Android Studio. In every update, lots of tools get deprecated. I know I can use deprecated "t...

0 answers  ·  posted 2y ago by Anonymous‭  ·  edited 2y ago by Anonymous‭

82%
+12 −1
Why is it considered bad practice to use float for representing currency?

This is intended to be a canonical post for this problem which is pretty common. Especially among beginners. I've heard that I should avoid using floating point variables for representing curren...

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

57%
+2 −1
What's the minimum API level for activity transition?

I was trying to show transition on activity changes. I had followed two method from SO. I lost those link so I can't add them here. My first method was I had used overridePendingTransition on onCr...

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

33%
+0 −2
How to break line in XML?

How to break line in XML? I was trying to follow the answer. But, It wasn't helpful for me. I had tried <br/> and <br />. None of them works. <?xml version="1.0" encoding="UTF-8"?&g...

0 answers  ·  posted 2y ago by Anonymous‭  ·  edited 2y ago by Anonymous‭

50%
+2 −2
How to show XML in browser?

Is there possible way to run XML like as HTML? Suppose, I have following code. <?xml version="1.0" encoding="UTF-8"?> <breakfast_menu> <food> <name>Belgian Waffles&l...

2 answers  ·  posted 2y ago by Anonymous‭  ·  last activity 2y ago by desbest‭

40%
+0 −1
How to initialize variable assignment in a non-OOP interpreter?

I'm still in the process of making MarkFuncs and having given up from copy-pasting open-source interpreters, them using OOP too, I decided to make one without OOP and with scratch alongside with th...

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

71%
+3 −0
How to make the text box such that its placeholder goes up and arranges itself in the centre of the border upon clicking?

How to make the placeholder so that it goes to the top of the border line on click? For example, when you go to Gmail and click on the input field, the placeholder text goes up and arranges itself...

1 answer  ·  posted 2y ago by nobodyImportant‭  ·  edited 2y ago by hkotsubo‭

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

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
How to properly manage PGP signing key storage, access, and usage for dev and automation?

I work for an IoT company. We recently got secure boot to work for a customer-visible product. For secure boot to work, the images we generate must be signed. Obviously, we want customer-visible sy...

0 answers  ·  posted 2y ago by ghost-in-the-zsh‭  ·  edited 2y ago by ghost-in-the-zsh‭

60%
+1 −0
Error: Cannot find module 'is-color-stop' in Tailwind CLI

While compiling the code for production in Tailwind CLI using: npx tailwindcss -m -o ./build/tailwind.css --purge "./**/*.html" I get: node:internal/modules/cjs/loader:941 const err = new ...

0 answers  ·  posted 2y ago by Kevin M. Mansour‭

50%
+3 −3
How to run a remote JavaScript file from GitHub?

I have a JavaScript file in GitHub which I typically run by copy-pasting all its data into different user script managers (USMs) on different web browsers. I need to start executing that remote fi...

2 answers  ·  posted 2y ago by deleted user  ·  last activity 2y ago by chovy‭

60%
+1 −0
Using http.get to get page from frontend

It's possible to use Angular 8 http.get to get a page from the frontend itself ? My local frontend url: https://192.168.0.177:4200/ I tried in a service: test(): Observable<string> { ret...

1 answer  ·  posted 2y ago by nelson777‭  ·  last activity 2y ago by Derek Elkins‭

86%
+11 −0
How to do private encapsulation in C?

I'm using an object-oriented design for my C project and trying to implement classes with private encapsulation. How do I do this? Some things I've tried that are problematic: Using a struct f...

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

70%
+5 −1
How allocated memory is calculated?

int arr[] = {10,123,14,14,15,16}; cout<<sizeof(arr)/sizeof(arr[0]); I was reading the article. When sizeof() is used with the data types such as int, float, char… etc it simply ret...

1 answer  ·  posted 2y ago by Anonymous‭  ·  last activity 2y ago by Canina‭

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

42%
+1 −2
What might happen if I ignore warning?

#include <iostream> using namespace std; int linearSearch(int array[], int n, int key){ for(int i=0;i<=n;i++){ if(array[i]==key){ return i; } } } int main() { int ...

2 answers  ·  posted 2y ago by Anonymous‭  ·  last activity 2y ago by Lundin‭

81%
+7 −0
Is it a good idea to have a permanent branch for a feature?

I'm rather new to using git, so I'm not sure about the best practices regarding it. I have a feature branch branched off, and periodically when the feature needs to be updated I will add some commi...

3 answers  ·  posted 2y ago by Moshi‭  ·  last activity 2y ago by Hyperlynx‭