Re: $_

From: Eric Walker (ewalker_at_micron.com)
Date: 12/30/03 

To: James Edward Gray II <james@grayproductions.net>
Date: 30 Dec 2003 09:48:02 -0700

Once I get into the while loop the previous line I had is lost. As this
while is underneath another while that I am using in another routine.

thanks
On Tue, 2003-12-30 at 09:42, James Edward Gray II wrote:
    On Dec 30, 2003, at 10:36 AM, Eric Walker wrote:
    
> I am going through a file and when I enter a certain routine, I am
> entering a while loop with the <IN> construct. Is there a way to back
> the counter up or back up one line before I go into the while loop?
>
> a
> b
> c
> d
>
> Instead of seeing b when I enter the while loop, adjust some option and
> see the a.
    
    How about adding:
    
    my $last;
    while (<IN>) {
            # use $last here, but watch for undef on the first iteration, for
    example:
            do_something( $last ) if defined $last;
    
            $last = $_;
    }
    
    Hope that helps.
    
    James
    
    
    

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