A couple of years ago I tried writing a monad tutorial in Perl. It went pretty well for a while, and I think I was able to explain what was interesting about them and how they might be useful. But the syntax was totally abominable. You couldn't actually use it.
in reply to Is it worth using Monads in Perl ? and what the Monads are ?
Even in Haskell, the syntax is pretty bad, but is saved by two things. First, Haskell's notation for constructing and composing functions is more terse than Perl's. And second, Haskell has special syntactic sugar (the "do" notation) for expressing monadic computations.
Anyway, I think it would be worth doing, if it could be expressed readably, but I was not able to figure out a way to do that.
This is the best explanation of monads that I have ever read. I hope you enjoy it.