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Mastering Development

How to divide an array into a tree of buckets sized by powers of two?

How do you take a number representing a list of items, and divide it into chunks, where the number of chunks is a power-of-two, AND where each chunk also has a power-of-two number of items (where size goes up to a max power of two, so 1, 2, 4, 8, 16, 32, 32 being the […]

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Mastering Development

Node.js and Express: Adding multiple flash messages

I am in a situation where there is a flash message when a file upload operation has commenced. req.flash(‘message’, ‘File Uploading!’); res.locals.messages = req.flash(); This code is on app.post(‘/’) This is what i use to catch the message: <% if (locals.messages) { %> <script language="javascript"> alert("<%= messages.message%>"); </script> <% } %> After the file gets […]

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CMS Drupal Mastering Development

How do I populate report page using a controller?

I’m following this tutorial on creating a report page for a custom plugin, but note that I’m using Drupal 9, and not Drupal 8 as per the tutorial. I’ve created a report() method inside my implementation of ControllerBase: <?php /** * file * Contains \Drupal\rsvplist\Controller\ReportController */ namespace Drupal\rsvplist\Controller; use Drupal\Core\Controller\ControllerBase; use Drupal\Core\Database\Database; use Symfony\Component\HttpFoundation\Response; /** […]

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Linux Mastering Development

Strange keyboard behaviour “k” not available under dwm except dmenu

I’m using a german standard keyboard (Cherry KC 1000, qwertz, with ä, ö, ü, etc.) set to us layout and installed an artix linux (openrc) system from scratch manually and seemingly something very strange happens in dwm. When I press k on the keyboard nothing happens. However, when I use it for searching in dmenu […]

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Mastering Development

Getting the inputted values in the array by passing a function

I am having some troubles in getting the inputted values in my array. We are required to create a function for the "methods". Let me explain it further. Here’s the full block of my code: using System; class LabExer { static void arrayVal(string[] arr) { for(int i = 0; i < arr.Length; i++) { Console.Write(arr[i] […]

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Linux Mastering Development

Why so many duplicated files of files in lowerdir occured in upperdir when using overlayfs without manual modification to them?

I installed new Fedora OS on SSD last year, my old HOME directory on HDD were leaved there until now. Recently, I want to combine the new HOME directory and old HOME directory into a merged HOME directory, so that I can have one view of my HOME directories to make life easier. After read […]

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Linux Mastering Development

Strange keyboard behaviour “k” not available under dwm except dmenu

I’m using a german standard keyboard (Cherry KC 1000, qwertz, with ä, ö, ü, etc.) set to us layout and installed an artix linux (openrc) system from scratch manually and seemingly something very strange happens in dwm. When I press k on the keyboard nothing happens. However, when I use it for searching in dmenu […]

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Mastering Development

Create a dynamic list from a master worksheet using VBA

I am struggling to work out what I need to do next. After spending a long time searching online I have found the following code that nearly does what I want Dim LastRow As Long LastRow = Worksheets("Data Input").Cells(Rows.Count, "B").End(xlUp).Row With Worksheets("Sheet7").Range("A2:A" & LastRow) Intersect(Worksheets("Data Input").Columns("A:A"), Worksheets("Data Input").Range("A1:A" & LastRow).EntireRow).Copy .Range("A1") With .Offset .Replace "ARL", […]

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Mastering Development

Facing problem of process exited with return value 3221225725

I am getting this-‘ process exited with return value 3221225725 ‘ for some of the values. I am facing problem to find where i goes wrong. Please someone help me. Here’s the code- #include<iostream> using namespace std; int binsearch(int a[],int find,int l,int u,int n); int main() { int a[10]={1,54,76,89,123,145,198,230,345,654}; int n=sizeof(a)/sizeof(a[0]); int find,l=0,u=n-1,x; cout<<"Enter number […]

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Ask Chemistry

Why do internal energy/heat and enthalphy differ? What is the physical significance of the $PV$ term for enthalphy of an ideal gas?

Let it be noted that this is not a duplicate of this downvoted-to-hell question, simply because I hope to ask it better! I’ve been reading a thermo textbook and I’ve got a simple question. The enthalpy of an ideal gas is $h = u + PV$. I understand that the specific internal energy, $u$, is […]