On: Advanced Programming Languages (2009)

[bencollier49]

So he recommends: "C++, Java and C#--and probably Python, Ruby, PHP and Perl too.... .. Haskell, Scala, ML and Scheme"

If you're going to learn that many languages, then for the current market, I would learn (in this order):

Python, JavaScript, Java or C#, C, Clojure / F# / Haskell, Rust.