Would the same attribution be required for code written by a human that learned from your example but did not copy it verbatim?

Do you attribute all of the code you ever learned from?

It may be because I’m a crappy programmer, but I often have SO or a search-discovered web page with someone else’s code while writing or debugging my own. Not for copy/paste, but to see how someone else used a function or solved a difficult problem that I’m stuck on.

I’ve never considered that to be a license violation. Is it?