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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.

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Regex for simplifying Amazon product URLs

Amazon product URLs are often very long, but on experimentation it is revealed that the following pattern is sufficient: https://www.amazon.com/{dp|gp}/$ID ID is a 10-char string, which I'm gue...

1 answer  ·  posted 7mo ago by matthewsnyder‭  ·  last activity 7mo ago by mr Tsjolder‭

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How do I properly render a quad in OpenGL using a GL_TRIANGLE_STRIP primitive?

I am currently working with LWJGL and the obstacle I face right now on my project is rendering textures to a cube, e.x a set of 8 vertices with position, color, and UV information. For now, I am st...

1 answer  ·  posted 8mo ago by cuzzo‭  ·  last activity 7mo ago by djm‭

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Adding two products into cart with help of a checkbox.

I've created a code snippet in "functions.php" that should add another product to your cart if you mark the checkbox, but somehow, only the original product is add (like the single product from the...

0 answers  ·  posted 8mo ago by gft‭  ·  edited 8mo ago by gft‭

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Is there a text version of pickle?

Is there a Python serialization format that has capabilities similar to Pickle, but is text based? The problem I always have with pickle is that it's binary, so I can't manually view or edit the d...

0 answers  ·  posted 8mo ago by matthewsnyder‭

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What is a Crossfilter group?

From reading about the Crossfilter data manipulation library for JavaScript, I take it that "groups" are an important concept in its operation. However, the Crossfilter documentation does not ever...

0 answers  ·  posted 8mo ago by CavanWright‭

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Best practices to write functions for both execution modes in Tensorflow, eager and graph mode

I regularly run into the problem that I have a Python function that I want to use in both, eager and graph execution mode. I therefore have to adjust the code so that it can handle both situations....

1 answer  ·  posted 8mo ago by daniel_s‭  ·  edited 8mo ago by daniel_s‭

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Slicing a dictionary using a string variable

I am working on adding uncertainty to some of my dynamics within a larger Monte Carlo simulation. As a way to perform multiple operations on each value, I decided to make and use a new function to ...

1 answer  ·  posted 10mo ago by megalomaniac‭  ·  edited 10mo ago by megalomaniac‭

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How to move Rancher Desktop virtual disk file to another location?

I am using Rancher Desktop as an alternative to Docker Desktop. After using docker for a while I have noticed that C:\Users\user\AppData\Local\Docker\wsl\data\ext4.vhdx has grown quite a bit (20GB+...

1 answer  ·  posted 11mo ago by Alexei‭  ·  last activity 11mo ago by Alexei‭

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PHP code is not excluding the watched videos.

Can someone explain why this PHP code is not excluding the watched videos? The email_id parameter is used to specify the location of the watched videos array. The code should remove the watched_vi...

1 answer  ·  posted 1y ago by Collins ‭  ·  last activity 1y ago by dagelf‭

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How to migrate after SQLalchemy schema changes?

When I set up my object mappings with SQLalchemy, everything works well enough. It even creates the tables for me if they don't exist. However, if I decide to add/remove columns (aka fields) from ...

0 answers  ·  posted 11mo ago by matthewsnyder‭  ·  edited 11mo ago by Alexei‭

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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

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Nannou model requires a function pointer: How to return a function pointer

Trying to make a nannou app from the template but with a customizable model() function. The template has this main(): fn main() { nannou::app(model).update(update).run(); } The model t...

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

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Accessibility standard/s for multilined <input type="text"> fields

I have a simple HTML contact form and I wish to create a text area in it with <input type="text"> but without a <textarea> tag. The end product should be an <input type="text"> f...

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

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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

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Print value from constructor

#include<iostream> using namespace std; class Book{ public: string title; string author; int pages; Book(string aTitle, string aAuthor, int aPages){ aTitle = title; ...

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

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Input taking only first character of a string

I wrote a program named Kernel.c 2 months into my life in programming and created 4 functions at the time, and now there are 7 functions. Recently, I updated the program completely onto an online ...

1 answer  ·  posted 3y ago by General Sebast1an‭  ·  last activity 3y ago by elgonzo‭

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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

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Why does my code show an error at deriving (eq)? (SOLVED) NEW ERROR: At SimpleEnigma & SteckeredEnigma constructors which I need help on :")

Hi, I'm trying to code an Enigma machine in Haskell which were used by the German in WWII to transmit coded messages. An Enigma Machine consists of 3 rotors which are substitution ciphers and a re...

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

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What does this function definition mean in Haskell?

What does this function definition mean in Haskell? fn x [] = [] fn x (True:ys) = x : fn x ys fn x _ = []

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

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Rest service doesn't find @GET Method (Jersey Rest service in Gradle).

I have to implement a JSON based REST web service for querying literature. Ordinary users should be able to query data and process it in their clients. The "main user" can adapt database entries vi...

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

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How to define Polly policies when working with Refit library in ASP.NET Core?

Note: this is based on my question on SO and subsequent activity there I am trying to add resilience using Polly to HTTP calls that are performed using Refit library. I am using the Refit factory...

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

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Working with a generic class that uses a type that should be of generic type

I have followed Nick Chapsas' tutorial to avoid throwing a ValidationException to treat validation errors and instead rely on LanguageExt.Common.Result<> from LanguageExt library. I have ma...

0 answers  ·  posted 2y ago by Alexei‭

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How to migrate NLog configuration from XML file(s) to application settings (JSON)?

I have just created an ASP.NET Core 6 application and added NLog support for logging: NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger() However, this API is almost deprecated as ...

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

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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 2y ago by Alexei‭  ·  last activity 2y ago by gbjbaanb‭

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In angular-imask how do I get the IMask class?

Using Angular-IMask, I'm programatically updating the field that has IMask. So I'm getting the error: "Element value was changed outside of mask. Syncronize mask using mask.updateValue() to work p...

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

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How to uncollapse an entire link tree with JavaScript?

This data tree is comprised of clickable buttons and I want to expose all branches, in a single action, instead of clicking each vertical arrow button anew. I have tried the following code which d...

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

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Recursion without a procedure ("function") in JavaScript

Credit for User:Meriton for developing the following code (first published here): function replaceIn(e) { if (e.nodeType == Node.TEXT_NODE) { e.nodeValue = e.nodeValue.replaceAll("a", "");...

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

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Using single xml file two activities in android

I want use single layout xml file for two different activities in android. Is it possible? How can I do it?

0 answers  ·  posted 2y ago by akshayshelke‭

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Why does a keydown event is listened only once?

The following code (credit for user:hkotsubo) moves the user to another page if Alt+Shift+E are pressed together. window.addEventListener('DOMContentLoaded', () => { let domain = window.loca...

0 answers  ·  posted 2y ago by deleted user

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MediaWiki JavaScript way to view the history of a page

I wish to view the revision-history-webpage of a webpage in MediaWiki without the conventional button to do so (I've disabled that button for aesthetic reasons). Please disable the MediaWiki View ...

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by deleted user

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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 2y ago by nelson777‭  ·  closed 2y ago by Alexei‭

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How to grant privileges to a user on a database specifically (i.e. not globally) in PHPMyAdmin?

In PHPMyAdmin 5.1.1 I have created a user account and a database with the same name and granted all privileges to the user on that database. I have exported the database to a backup file, deleted ...

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by deleted user

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How to to make a store tree view cart

I am building an MVC cart system. I have the MERCHANTS table and the PRODUCTS table. A merchant (store) can have one or more products, everything works fine but what I want is to display products b...

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

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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 2y ago by Alexei‭  ·  last activity 2y ago by r~~‭

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How to fire the change event for an input field?

I have added some input to an input field element this way: const inputFiled = document.querySelector("#example"); inputField.value = "X"; I want to fire a change event for that field right af...

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

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iframe tag is vertically scrollable although I would expect it to vertically stretch 100%

I have an iframe tag to which I didn't set height so it has a default height which is 150px (at least in Google Chrome). As a consequence, the iframe appears partially in such a way that constant ...

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by deleted user

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How can you modify your server code to make it accept any port numbers instead of just one which is the one you predefined?

Is there any way where I can modify the original server code so that it accepts any port number instead of the predefined one (i.e., port number 8989)? Port number will be entered in the command li...

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

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Tracking what users are searching in a content management system

I have a website with a search box. Running search queries in that search box creates frontend/dynamic search result webpages in which search results based on a search query can appear. Let's ass...

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

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Manipulate a web browser to hide a certain HTML element in a certain website by a single action

Before I publish a new webpage in my website (in the content management system itself), I zoom in from say 100% zooming to 500% zooming and then re-read it, as a nice way to check for typos. The p...

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

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Create a list of Niven numbers in Python

There's this new challenge on Code Golf CD and I'm using Python to do it. A little bit of golfing already took place, so the code might look a bit messy for you. Anyway, I'm proud of what I've writ...

2 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by Dirk Herrmann‭

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When I use the piecewise function I get more columns in the output

I have this code syms t y(t) = t*heaviside(t)*heaviside(1-t); x(t) = piecewise(0<=t<=1,1,t<0,0,t>1,0); l = -2:0.01:2; disp(y(l)); disp(x(l)); and in the output, I ge...

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

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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

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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

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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 3y ago by aditya98‭  ·  last activity 3y ago by meriton‭

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Resources for learning Julia [closed]

I have decide to try out Julia. Is anyone aware of some good resources to get started with the language?

0 answers  ·  posted 3y ago by Guilherme Costa‭  ·  closed 3y ago by Alexei‭

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How to generate random objects at different locations on x, y, z axis

I have been trying to generate a random object on all three axis in different locations. However, Vector3 doesn't accept that many overloads e.g: Vector3 spawnPos = new Vector3(Random.Range(spawnL...

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

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Why OFFSET isn't working the way it is expected?

I had three data with where gender=female. I was trying to call those data with limit and offset (Since in future there might be more than 1000 data). SELECT * FROM `users` WHERE `gender`='Female'...

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

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&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

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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

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How to implement automatic text-to-link conversion in TypeScript?

I'm trying to create an automatic text-to-link conversion feature in a TypeScript application. The desired workflow is: Copy a URL to the clipboard Select some text Paste the URL - this should...

0 answers  ·  posted 8mo ago by ShadowsRanger‭  ·  edited 8mo ago by ShadowsRanger‭