Here are two solutions I wrote to the puzzle I posted earlier this week. The first version is very imperative and uses the Do operator to side effect, it then uses variables captured in the closure to track its state. This one you have to be careful...

Steffen has already posted two beautiful solutions. As often happens with specs, I was not detailed enough about what I want the behavior of the signature I provided to be: I meant multiClickSpeedInMilliSeconds to be the total time between the first...

After working on the Reactive Framework with Erik, Wes and the rest of our team for over a year, it is great to see that the word about System.Reactive is out (as described here , here , here and here ). I thought it might be fun to post a little puzzle...