Checking if a port is listening

[Marc Schütz via Digitalmars-d-learn]

On Wednesday, 23 March 2016 at 21:37:09 UTC, Lucien wrote:
> When I remove the Thread.sleep, it doesn't find all adresses. 
> Why ?

Socket.select() will wait _at most_ 100 msecs. If a socket gets 
ready before that timeout, it will return immediately. Therefore, 
you might not get the full TIMES*100 msecs, and some hosts might 
not have responded in time.