Monads - How to convert this map/flatMap into a for comprehension in Scala. Scala - Confused with the for-comprehension to flatMap/Map transformation. Code Commit (permanently in beta) 17 May 2010 Almost exactly a year ago, Google made one of the most remarkable press releases in the Web 2.0 era. Of course, by “press release”, I actually mean keynote at their own conference, and by “remarkable” I mean potentially-transformative and groundbreaking. I am referring of course to the announcement of Google Wave, a real-time collaboration tool which has been in open beta for the last several months. For those of you who don’t know, Google Wave is a collaboration tool based on real-time, simultaneous editing of documents via a mechanism known as “operational transformation”.