This question already has an answer here:
- I'm an experienced developer and technical architect (C#, Delphi, Java, Clojure, Assembler, Perl, various esoteric functional programming languages)
- We need to hire some Ruby developers for a growing Ruby on Rails project
- I don't personally know much Ruby at all, but need to evaluate some candidates
What's the best way to fairly evaluate a developer who is hopefully skilled in a language you don't personally know well?