pedxing <[EMAIL PROTECTED]>:
> On Jan 11, 4:20 am, "s. keeling" <[EMAIL PROTECTED]> wrote:
> >
> > -----------------------------
> > #!/usr/bin/perl
> > # this just re-implements tail -1
> > #
> > # usage:
> > # /this/file < /some/text/file.txt
> > #
> >
> > my $last;
> >
> > while( <> ) {
> > $last = $_;
> > }
> >
> > print $last;
> > -----------------------------
> >
> > Now, try with the "my $last;" *inside* the while(). That last print
> > line won't have a clue what $last is.
>
> my $last;
> my $bar;
> while( <> ){
> $last="foo";
> $bar=different_scope($_);
> }
> print $bar;
> print $last;
>
> sub different_scope{
> my $last=$_[0];
> return $last;
> }
I haven't tested it. Saved for posterity though.
> Actually, this is a better example, because it will actually work
As does mine.
> #;-). But the point is that scope doesn't change in a loop, but it
> does in a subroutine.
You should have tested my code. :-) Thanks to the others for their
informative comments.
--
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(*) http://blinkynet.net/comp/uip5.html Linux Counter #80292
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