Maybe. I've been coding professionally for a few decades now. I have always looked stuff up constantly. It's a lot more seamless now due to first search engines

Maybe. I've been coding professionally for a few decades now. I have always looked stuff up constantly. It's a lot more seamless now due to first search engines and later the ever improving autocomplete. To be honest, I think half the time I just do it to do it. But for instance I bounce between languages so often that I can never remember the fine details of syntax. To use your example, things like for loops, matches, and the like are things that I tend to double check. And that's the point. Everyone has their quirks, and if you're going to claim you want them to work they way they normally work, who cares? If they're able to turn out quality code at a reasonable clip, who cares what they need to look up.