I am under the impression that my is for the following:
my $var = 'Whatever';
sub Hey
{
print $var;
}
Shouldn't print anything... my is local scope without recursion. I know
that this works for subroutines. Declaring a variable local makes a copy
of the variable. While declaring a variable with $my makes a new variable.
So declaring global variables with my means that subroutines can't change
them. Declaring local means subroutines and any *child* elements of the current
package can change them. So there are a few subtle differences. If someone
can explain this better then please do. I'm a perl novice at the most.
- Justin Rogers, CEO DigiTec Web Consultants
[COOP]DigiTec - Half-Life, Q3A, Unreal Tournament
----- Original Message -----
From: "Aaron" <[EMAIL PROTECTED]>
To: "Perl-Win32-Users Mailing List" <[EMAIL PROTECTED]>
Sent: Saturday, May 13, 2000 10:22 AM
Subject: Why So Much My? (was Re: Finding Latest File)
> I was under the impression that the reason for using
> "my" to declare a variable was to make it act like a
> local variable in a sub-routine or loop. Once you
> leave the sub or loop, the variable ceases to exist,
> thus making your script more efficient, easier to
> debug, and more flexible.
>
> But, I have yet to understand what the benefit of
> using my on, what I would consider to be, "global"
> variables. Won't the vars in the "main" part of the
> script get destroyed upon completion?
>
> Alas...I suppose some caring person may wish to impart
> this knowledge to me. :)
>
> > Your technique is not something to pass on IMHO.
> > A couple of changes may be appropriate or necessary:
> >
> > use strict;
> >
> > > opendir LD,".\";
> >
> > opendir LD, '.' or die "Error on opendir: $!\n"; #
> >
> > > @files = readdir LD;
> >
> > my @files = readdir LD;
> >
> > > closedir LD;
> > >
> > > $y = 0;
> >
> > my $y = 0;
> > my $new_file = '';
> >
> > > foreach $f (@files) {
> >
> > foreach my $f (@files) {
> >
> > next if $f !~ /^www\d+\.txt$/; # drop non-conforming files
> >
> > >
($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blo
cks)
> > > = stat($f);
> >
> > my $mtime = (stat $f)[9]; # much simpler
> >
> > > if($mtime > $y && -f $f) {
> > > $new_file = $f;
> > > $y = $mtime
> > > }
> > > }
> > > print("$new_file\n");
> >
> > Now you can copy it to the new dir.
> >
> > --
> > ,-/- __ _ _ $Bill Luebkert ICQ=14439852
> > (_/ / ) // // DBE Collectibles http://www.wgn.net/~dbe/
> > / ) /--< o // // Mailto:[EMAIL PROTECTED] http://dbecoll.webjump.com/
> > -/-' /___/_<_</_</_ http://www.freeyellow.com/members/dbecoll/
> >
> > ---
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> --
>
> -------- Aaron Rainwater ---------
> | Only two things are infinite: |
> | the universe & stupidity... |
> | I'm not sure about the former. |
> | ~ Albert Einstein |
> ----------------------------------
>
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