Hasekll Road to Future

Several friends have asked me about Haskell functional programming language. I haven't used it in daily jobs, yet I'm learning it not only because of its beauty and simplicity to express math, logic and algorthim, but also the fact that it's quite a hard excersize for my brain. There's no other language that has the density of new concepts as Haskell does.

Besides its being lazy and pure (shocked by the conecpts? hehe), Haskell also has the ability to define internal domain specific language (DSL) like Ruby. I wish there will be a Haskell killer application to utilize this advantage in the similar way as Rails to Ruby.