More send in time

[Dar Scott]

I'm babbling on, but I wanted to add one more thing about using send.

 From these examples and from most I've seen on this list including 
mine, one can get the impression that send is useful only for repeated 
execution, a sort of glorified idle.  However, send can be used to 
build timeouts, delays, activity sensors (retrigerable oneshots for you 
electronics types) and other mechanisms, even in concert with 
callbacks, such as sockets callbacks.  These message machines, as I 
call them, can be used to interact with other message machines.

Dar Scott