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Re: Flushing the print buffers.

by FunkyMonk (Canon)
on Feb 21, 2008 at 19:58 UTC ( #669375=note: print w/replies, xml ) Need Help??

in reply to Flushing the print buffers.

I guess you got a "Name "main::OUTPUT_HANDLE" used only once: possible typo" warning with the code you posted


my $old_fh = select(STDOUT); $| = 1; select($old_fh);

  • The first select changes the default output filehandle to STDOUT and returns the current default output filehandle to be saved in $old_fh.
  • $|=1 turns on autoflushing on the current output filehandle
  • select($old_fh) restores the original output filehandle

Generally, if you just want to turn on autoflushing on STDOUT, a simple $|=1 will do.

Replies are listed 'Best First'.
Re^2: Flushing the print buffers.
by kansaschuck (Sexton) on Feb 23, 2008 at 06:01 UTC
    This worked nicely:
    my $old_fh = select(STDOUT); $| = 1; select($old_fh);

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