I wonder about the right way to elaborate on an answer.
The question was "how can I write this code in one line". The currently highest voted answer gives a working one-liner, but offers no further explanation.
I would like to elaborate on this answer and explain what it does. I don't have the right to edit the answer. I could comment on the answer, but it would be hard without formatting. Is it ok to copy the solution to my own answer to explain it further?