(Video of these slides here http://fsharpforfunandprofit.com/rop)
(My response to "this is just Either" here: http://fsharpforfunandprofit.com/rop/#monads)
Many examples in functional programming assume that you are always on the "happy path". But to create a robust real world application you must deal with validation, logging, network and service errors, and other annoyances.
So, how do you handle all this in a clean functional way? This talk will provide a brief introduction to this topic, using a fun and easy-to-understand railway analogy.