WART | WhatsApp Registration Tool | Regex library

I'm creating a program to analyze security camera streams and got stuck on the very first line. At the moment my .js file has nothing but the import of node-fetch and it gives me an error message. What am I doing wrong?

Running Ubuntu 20.04.2 LTS in Windows Subsystem for Linux.

Node version:

When I change the value that I pass to my array I receive strange error which doesn't stop the program but it always appears so I'm curious why. I give you my code below: My error is something like: In function 'int numOfDifferentElements(BSTree*, int)': control reaches end of non-void function [-Wreturn-type] ( main.cpp:97:1 ) and there is an arrow pointing to: }

I am looking for a loop that copies the value for every matching input value and not just stuck on the first it finds. So I input into a combox some id number which I want to be found in 2 workbooks (wb FC and CL1) and copy the value to its right and paste in another workbook. In FC that value will appear only once but in CL1 it can appear many times. The loop I tried stucks on coping it just for the first found value and I want it to copy it for every matched value.

Here is what I came up with:

I'm writing a regex for client form data validation through JavaScript but I can't find a way to make a regex that matches this rules:

1. Email must not begin with dot (only with number or lowercase letters),
2. Part of email before @ can have lowercase letters, numbers and dots but not consecutive ones,
3. Last character before @ must not be dot,
4. After @ there have to be at least two lowercase letters or numbers and after that there has to be at least one construction which contains dot and at least two lowercase letters. Emails like that should be matched by this regex: cary1.1grant.2@gmail.edu.us or 1james23ste.wart@mail3.co.com but NOT something like this marilyn..monroe@gmail.co.us or .marlon12brando@yahoo.edu.us or jamescaan.@gmail.gov.fr

This is my regex but it checks end of the whole string for not allowing dot and not just before @:

I have created 2 classes ("MainWindow" and "przycisk"). In one of them (MainWindow) I have second class pointers array (przycisk *tab[33][33]). The problem is that when I want to change any value of this array, the program crashes). What am I doing wrong?

"Main Window" class:

I have a problem. I've created a class, in which I have a slider and a label. I want to connect these with the QObject::connect, but when I do it, nothing happens. Can you tell me what am I doing wrong?

My class:

Here is a simplified version of my code.

How can I avoid to call asInstanceOf (because it is a smell for a poorly design solution) ?

By design, we know for sure that we have an instance of HourlyDateFormat

How to avoid calling asInstanceOf in this case (i.e how to help the compiler to infer the type) ?

I have a problem with getting result of this SQL query. It gives result by other tools, but I can't declare it in C#. I didn't have problems with easy queries without DECLARE, SET etc...

Query in SQL: