[golergka]

I'm only a Haskell beginner, but I have solved similar task, with parsing that may fail, in CIS 194 course. The solution was based on applicative functors, and I really don't think that Java or other languages have anything like it.

Here's the lecture: http://www.cis.upenn.edu/~cis194/spring13/lectures/10-applic... and PDF of the assignment: http://www.cis.upenn.edu/~cis194/spring13/hw/10-applicative.... Here's my solution of it: https://github.com/golergka/cis194/blob/master/Homework11/sr...

I hope it's readable enough to illustrate the overall concept - but please bear in mind that I'm a beginner and probably have made dumb mistakes. If you have any criticism or suggestions, I would love to hear and learn from them: learning Haskell is the first time in my software engineering self-education where I wish I had regular contact with instructor or a mentor.