Reference of similar functions between Programming Languages [closed]

Question

I'm wondering is there is a compiled knowledge base of similar functions or functionalities between several programming languages. The reason I'm asking this question is due to the fact that one is learning a new programming language and has extensive knowledge of another, it's often difficult to know or imagine the correlation of functions between those two languages.

Obviously, if such reference exists, it would make learning a new language much easier since one only had to lookup the similar function and eventually memorize it.

Answer 1

• Rosetta Code - user-edited wiki focused on implementing tasks in different languages
• Syntax across languages - more focused on syntax
• Wikipedia: Comparison of programming languages (basic instructions)