a brief history of my fp first experience

If you ask me where I first heard about functional programming, it was from sguez, and it was about year 1984.

So there.

I had no clue what it was; all our code was in Fortran, and the functionalness was that, thanks to certain features of Fortran compiler, we could write a one-liner that scans a file looking for certain records and returning those records.

And so it goes.

It was fun.

hmm, second order generics...

  def product[X, T[_] <: Iterable[_]](xss:T[Set[X]]): Set[T[X]] =
      if (xss.isEmpty) {
        Set(T())
      } else {
        product(xss.first, xss.tail) map cat
      }

Not sure if it'll work. What happens here, we take type T, which is at least an Iterable, and build a product of T of sets; so it will be a set of Ts (kind of like monadic transformer, no? To me, it is a commutator), Set.T -> T.S; what I need from T is an empty constructor and a cat.

Will see.