What project do you build to pick up a new programming language?

Question

A project that covers almost all the important features of any programming language.

emrah · Accepted Answer

Here is another interesting list of projects. The book is specific to python but the projects are interesting and they can be implemented in any language:http://tinypythonprojects.com/

emrah · Answer

I don't know about "all important features" but you can try projects from https://projecteuler.net/archives

beardyw · Answer

If there was one set of important features there would only be one language.

lyset · Answer

I always go with CRUD, if its a web project.