The autoflush($|) variable is very useful, especially for debugging, so that you can 
monitor the printed output of your script in real time.  One thing to watch out for 
that most people miss the first time they read the docs, though, is that you need to 
select() your filehandle before you use it, otherwise you're just autoflushing  
STDOUT.  Oh, and don't forget to select() STDOUT afterwards, or all of your print 
statements will go to that filehandle by default.


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