I've seen for '$|' says a non-zero value will force fflush after every 'write' or 'print' statement.
For a better explanation, see the thread Perl Idioms Explained - $|++, especially where it talks about ++ and --.

-QM
--
Quantum Mechanics: The dreams stuff is made of

In reply to Re^3: Elegant way to split into sequences of identical chars? by QM
in thread Elegant way to split into sequences of identical chars? by pKai

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