General Q&A about programming, scripting, software design & architecture, process, tools, testing, and more.
A user of Web Applications asked how to: +1 when the value is >=5, +2 when the value is >=10, +3 when the value is >=15, +4 when the value is >=20, +5 when the value is >=25...
A presently unanswered question on Stack Overflow asks: Does there exist a popcount function in libreoffice calc? and clarifies that "I often use BASE(A1;2;8) to show a number in binary".
A Q on Stack Exchange from a very long time ago included: I have first names in one column and second names in another, I want to create a third column that contains the first character from the...
A user of Web Applications asked "How should I fix the formula?" with reference to: =IF($K4<2,$K4) applied as a Conditional Formatting [CF] formula to J4:J8, where the desired (green fill) form...
The question about LibreOffice Calc - Number of occurrences in text string from Binz Nakama at Stack Overflow interested me because of one of the comments posted there: OK, I think this would requ...
In Excel I would like to concatenate several strings into one. I could type and fill in the blanks CONCATENATE(A1, A2, ....) but it is a lot of work This would be cool, but it does not work CONCATE...
A Q on Stack Overflow asks how to merge two columns where each row has only one populated cell. The example was from (on the left) to (on the right): a|b a 0| ...
A user of Web Applications gave the following as an example: https://docs.google.com/spreadsheets/d/1nPTBFXaIgpruPgNoWFSBUL2yKaibjeNJNExhnHVr8LE/edit#gid=0 and asked: How do I read a long ro...
In response to a Q on Web Applications [WA] the asker self-answered with: =CONCATENATE("@ £/€ rate: ",text(J21,"0.00000")) The issue was that, with "in a cell J21 I have a set value 1.10000":. ...
A very recently asked Q on Web Applications has no answer yet (and, in my opinion, is so badly written may not receive an answer at all promptly). However it does seem (in my interpretation) to rai...
An as yet unanswered OpenOffice Calc - Highlighting the higest value in multiple columns posted by Rui on Super User from early this year asked whether a condition was possible to: fill with a c...
A couple of year ago a user of Super User reported difficulties with summing values purporting to be Euros imported to LibreOffice Calc in CSV format. In the Q the user does not mention the locale...
For use in connection with conditional formatting with alternating coloured fills in OpenOffice Calc, several years ago a user of Super User was applying this Ruby script: f = File.readlines("sha...
Given ColumnA contains a Text header (A1), an allowed maximum number (A2), fifty tickboxes (A3:A62) and a formula in A63 of: =countif(A3:A62,TRUE) how can I block application of more than the a...
I had build an application using following source code (following the steps). package com.decibal.level; import androidx.appcompat.app.AppCompatActivity; import android.media.MediaRecorder; ...
Overview Our development team is currently trying to develop and migrate a Web application that is split in two: legacy: ASP.NET MVC 5, jQuery, old-style JS programming overall "next": Angular...
I want to write a text file from multiple threads. The file structure is line-oriented. This means writing of lines should be atomic. I am using Qt 5.15.2. Is it enough to protect a shared QTextSt...
Through the years I have "tasted" several website hosting companies; none of them had Markdown available in their support-ticket-systems (if all any formatting method available). Why is it? What's...
I wrote a program for calculating EMA, but my values differ from the values calculated on this site. My program: double[] x = Numbers();//array numbers int N = 5; double k = 2.0 / (N + 1...
In some situations, could it be problematic to migrate a website's database (MySQL) from one website hosting provider to another without the information schema or with the information schema? In m...
I have read that several programming languages, listed below are considered "typeless": Forth Brainfuck B MUMPS BLISS Lucid BCPL I have shared this data with a programmer who clued that...
I have several classes (C_1...C_n) and their instances (I_1....I_m). I have a "Registry" R of these. There are several pieces of data (d_1...d_k) spread across various instances. This much is set ...
I know I can change the font of each cell individually by overriding getCellRenderer(row, col) in JTable but I want to be able to change the font of an entire column at once and, ideally, have the ...
I had a curiosity about how much the experienced users wait for their questions to be answered on Stack Overflow and had written a query for it: SELECT YEAR(q.CreationDate) * 100 + MONTH(q.Creatio...
I heard rumours that the strcpy function is dangerous and shouldn't be used. Supposedly it can be exploited to create buffer overflows somehow. And indeed when I compile my C code in the admittedl...
When creating a code-first solution in dot net core using Visual Studio, you manipulate the database by changing model classes and migrating the changes. I can set the schema for tables that I cre...
As a big fan of tacit/point-free programming in general, I'm looking at different tacit programming systems for inspiration (for a language I'm creating). What are the advantages and disadvantages ...
A Zalgo Text is something like this: T̃͟͏̧̟͓̯̘͓͙͔o̤̫͋ͯͫ̂ ̥͍̫̻͚̦͖͇̌ͪ̇ͤ̑̐͋̾̕i̢͖̩͙͐͑ͬ̄̿̍̚ͅn̵̢̼̙̳̒̄ͥ̋̐v̡̟̗̹̻̜͕̲ͣ̐ͤͤ͒́oͫ͂̆͑ͩ҉͇̰͚̹̠̫͔̗k̷̭̬̭͙̹̺̯ͩ̌̾̒̋̓ͤ͛͘͠e̥͙̓̄̕ ̵̫͈ͪţ̱̺̺̑̿̉̌͛̂̇h͙̣̬̓̂͞ę̡̲̟͎͉̟͛̓̉̆̉͘ ͬ̒...
Every URL is a URI but not every URI is a URL is a saying I know from long ago, but what is an example for a URI which is not a URL (whatever the user agent would be - a web browser, a *nix utility...
I am trying to change the font type and size in a JTable cell. Ive looked at tons of posts and while most don't produce stack traces, they don't seem to do anything either. Here is the code I curr...
I'd like my web front end to be accessible, including to people who use screen readers. I know the basics about labels and alt text for images, but there are some areas where I'm not sure what a s...
Is it worth using the Java Platform Module System introduced in Java 9 to structure application code? Given that the Java Platform Module System introduced in Java 9 doesn't manage dependency versi...
In the C program below, I make a mistake and call the function with (ld, ld) instead of (d, ld). #include <stdio.h> #include <limits.h> void print_int_long(int n, long l){ pri...
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 ...
I have a parent child relation in my table, with possibly circular cases. Is it possible to break the infinite recursivity in CTE checking values of all previous rows? I would need something like t...
I seek help in finding a term common in game development, particularly 3D First Person Shooter games (not at all in 2.5D games such as Doom). I understand that 3D first person shooter games can be...
I am fairly new to working with @ngrx pattern in Angular which is a state management pattern relying on Reactive Extensions. One of the convenient structures is @ngrx/entity which helps with manag...
I am trying to save my question that was deleted from "Webmasters StackExchange" for not being about "a problem in a website" which I published there anonymously ; below is a shortened, directly-in...
We have a bunch of dead branches in our git repository, and I'd like to clean them up. Ones that were merged (but not deleted at the time) are easy; we can see those in the branch list on Bitbucke...
How can one differentiate what is or is not a *nix operating system even if that operating system (or its core/shell/common-utilities) allegedly behaves like any "other" *nix operating system? Is ...
Context Our team has begun migrating a pretty old internal application and one aspect that got my attention is the impersonation. This is implemented as follows: only administrators are allowed...
I have an HTML-PHP-CSS contact form with a date field: <input type="date" name="date" id="cf_input_date"></input> The default value in this field is the W3C built-in default: dd/m...
On a CentOS Apache-MySQL-PHP environment I have a website with a simple HTML-PHP-CSS contact form; the contact form itself is working. This is how I backendly redirect a user from the contact form...
Context My ASP.NET Core application got stuck in Production with a 5xx error. By inspecting the logs, I have noticed that a database error occurred during application initialization, namely a SQL ...
I want to conditionally disabled or not (enabled) a bunch of reactive form controls. However, I have noticed that neither enable or disable function has a boolean parameter to nicely conditionally ...
I host my website on a CentOS-Bash, PHP and MySQL environment; my local email client is engined by Roundcube. I don't know almost anything about PHP nuances. While my web domain registration is do...
I have a simple HTML-PHP-CSS contact form (no JavaScript) with an input type="url" field. Currently in 30/03/2021, the default behavior of input type="url" (by W3C design I guess) is to obligate t...
I have a simple HTML-PHP contact form with some CSS. I desire to prevent the default behavior of the form which leads the user into a blank PHP page after submission, and, to have the form being s...
On 25th October 2020 in Europe/Berlin clocks where set back from 03:00 AM to 02:00 AM to change from summer time (CEDT) to winter time (CET). Which means there is a 1 hour separation between 02:30...
I transfer emails from my Right To Left (RTL) contact form → to my local email box (powered by Roundcube). Emails reach my email box (inbox) just fine but I have a problem were PHP variables aren'...
