On Fri, 5 Oct 2001, Bill Jones wrote:
> Not in this *example test* world I created for students (at least I didn't
> want them too.) Recently I started teaching Perl as an Internet Programming
> class (CGS2557) here at FCCJ and one of my students asked if it was possible
> to get at it somehow - I said I didn't think so, but to be sure I wanted to
> ask here.
What you can do, though, is show them cool little tricks you can do with
scoping, such as closures. Here, you create a code reference that uses
variables that are out of scope, but still exist within the scope of the
anonymous subroutine. Consider:
sub gen_sub {
my $text = "This is within the scope of gen_sub";
return sub { print "$text\n" }
}
my $new_sub = gen_sub();
$new_sub->();
This prints out the contents of $text, even though $text is lexically
scoped to gen_sub. Cool, huh?
-- Brett
http://www.chapelperilous.net/
------------------------------------------------------------------------
meterologist, n.:
One who doubts the established fact that it is
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