Re: [TCLUG:21227] Newbie perl question

[Dave Sherohman <esper@sherohman.org>]

Jim Crumley said:
> On Tue, Sep 12, 2000 at 02:13:28PM -0500, Nick.T.Reinking@supervalu.com wrote:
> > for (my $i = 0; $i <= $#addrlist; $i++)
> >   {
> >   if ($addrlist[$i] eq $addr) { splice (@addrlist, $i, 1); }
> >   }
>  
> Doesn't this break the array subscripts though. You had an array
> of 4 items (0=a 1=b 2=c 3=d), and you pull out the first one (index 0).  
> Now you have (0=b 1=c 3=d). You for statement happily goes on to check
> the next index 1, but it has skipped over checking b because the
> indices change.  

In the more general case, absolutely.  In my situation, though, an address
will never appear in a list more than once.  (Unless users go and edit the
list on disk manually...)

> Anyway, I could have sworn I had that problem, so I would run the
> loop in reverse.

Good idea.  You never can trust users to behave the way you intend.

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