Monads in Perl Monads in Perl (in the spirit of TMTOWTDI) Haskell is the language that popularized (?!) monads, but my understanding was impeded because of the myriad of new things that I needed to learn about Haskell before I could even get to monads (different syntax, purity/laziness, typing system, significant white-space, etc.) All that added up to something as clear as mud. I needed a Rosetta