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codewars.com is a good alternative also. Currently it supports Clojure, CoffeeScript, Haskell, Java, JavaScript, Python, Ruby and they keep adding new languages
by RazvanPanda 12y ago
codewars.com is a good alternative also. Currently it supports Clojure, CoffeeScript, Haskell, Java, JavaScript, Python, Ruby and they keep adding new languages according to user votes (Haskell and Java were the latest).