Often, when you need to solve some problem in a new or old and forgotten language, quite simple questions arise, for example, I have a question today how to check for null (nil, none, nothing, nothing) in Tcl.
RosettaCode is a programming reader, contains solutions for typical tasks in different languages, for example,
my solution .
You can view solutions by
tasks ,
languages ,
libraries .
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Of course, the search engine gives answers to such questions rather quickly by entering analogies from other languages, as well as any manual on the language, but the availability of such a “converter” of knowledge into a new language is very convenient.