Scripting Languages: PHP, Perl, Python, Ruby – Hyperpolyglot.
If you’re like me, leaning is often a very hands on process that involves comparisons with things you already know. While I’m not sure it’s the best way to learn a new programming language in and of itself, I do think it’s a nice way to learn a new syntax.
Not everything language to language is directly comparable, and I’d always opt to read a book in full when learning a new language, but seeing a reference chart like this can be terribly useful when looking things up quickly, or figuring out something new.