I'm nitpicking here, but note that $|++ does not increment $| when it's 1. $| is always 1 (flush) or 0 (buffer).

That means that: 

# INCORRECT
sub something {
  $|++;
  # do something without buffering
  $|--;
}

[download]
Will turn on buffering even if it was off before calling the subroutine.

Usually that's not really a problem, but if you need to revert autoflush to its previous setting, you have to remember its status yourself: 

#CORRECT
sub something {
  my $flush = $|++;
  # do something without buffering
  $| = $flush;
}

[download]
"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^2: The weirdest thing.... by Joost
in thread The weirdest thing.... by perlNinny

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