On Twitter recently someone posted this picture: Ok, that’s C#, but we can (and will, in a few lines) rewrite it in C++. In the twitter responses, many people made fun of the code, or complained that the function is full of magic numbers, some others that it’s too long (implying that the cost of …

Continue reading 10 Balls

This post is also available in Italian. Recently I did a batch of interviews for three positions in my team, and part of my standard interview is a coding question. I tend to focus on problems that will take at most 50% of the time I have, so the ideal question for me is apparently easy, …

Continue reading The Coding Interview

I begun to write this two years ago at the beginning of the pandemic, but then forgot to read, and hit publish. I think today is a good day to update, clean up, and publish. You might not be stranded at home anymore, but I think most of the things I wrote are still valid, …

Continue reading On studying C++

This code has been compiling for the last several years, despite the fact we have the perfect tool to make this foolish code stop compiling. Adding an ampersand at the end of every copy-assignment and move-assignment operator (or operators of the form <op>=). Why isn’t this best practice already? Or if it is, why isn’t …

Continue reading Should this stop compiling?

Updated on 2019/07/03 (long overdue) after this thread on reddit. My post from last week contained a HUGE bug: optionals don’t move their content lose their value on move, so destructor on moved handles is still invoked (thus causing multiple destructions). In the brief discussion on reddit, I proposed to create a optional with move …

Continue reading Moveable optional, really?