Re: [Haskell-cafe] Re: How to do this in FP way?

One half of all Haskell coders will tell you that mutable state isn't a good starting point to learn Haskell, the other half will tell you the same because they want to be cool kids, too.

And the one left over will point out that he asked how to do this the FP way, not the imperative way? If it was me btw, I'd take a stab at the problem being that each time we do something a time gets updated and we want to know how much time has passed since we last did "something". I'd approach this by generating a lazy list of times at which we started doing "something", and then generating a lazy list of time differences. Bob