crimeny! I'm doing a training at work to
introduce people to perl. In the sequence
of putting together some handouts, I've
learned a thing or two I didn't know before.
first, could someone tell me when did perl start
supporting an open function that handles 3 parameters?
open ($handle, $mode, $filename);
is this the preferred usage when opening a file now?
second, is using a reference to a filehandle
the preferred way of passing filehandles
around higgly piggly?
my $fh = \*MYHANDLE;
open($fh, $read, $name);
print_next_line($fh);
close($fh);
sub print_next_line
{
my $handle = shift;
my $line = <$handle>;
print "line is $line";
}
I've seen the first line written like this too:
my $fh = *MYHANDLE;
what's the difference? advantages/disadvantages?
The scripting I do generally has very basic
file io, so I always used a bare filehandle.
This was always a pain if I wanted to pass
it to a subroutine. I never knew you could
pass it via a reference to a typeglob,
(if that's what \*HANDLE really is.)
will all file IO functions take a reference
like this?
Greg
happy happy joy joy
