Speaking of this, I've always liked Perl's $,@ and % prefixes that distinguish between scalars, arrays and hashes. It is like a very minimalistic hungarian nota

Speaking of this, I've always liked Perl's $,@ and % prefixes that distinguish between scalars, arrays and hashes. It is like a very minimalistic hungarian notation, but that's exactly why it's so great: just a single extra character gives you all the extra info, while imposing a minimal additional mental strain on your brain while scanning the code