I did not wake up this morning expecting to see programming language slashfic on HN (or at all, actually). The author, like many programmers, assumes that you

I did not wake up this morning expecting to see programming language slashfic on HN (or at all, actually). The author, like many programmers, assumes that you can only use one language at a time. That if you're using Haskell, or Python, or whatever, that you're not allowed to mix-and-match with other languages within the same project. But you can! Most languages have an FFI; just bind their interpreter's APIs and you can run Haskell and Python and Ruby and Lua and whatever from within the same project, or even the same process.