Could you please tell me where I can find out about the syntax of the
@subset{@subset} = ();
line? I see what it does (only by printing out the %subset hash after the line is
run), but I
don't think I've ever seen this construction documented. Particularly, how does an
item get placed
in a hash by using an lvalue which is a standard array using the @ sign? I also have
to start
learning more about and using grep. This is a very elegant solution, and one I would
never have
thought of. Thanks, Philip!
--Chuck
--- "Newton, Philip" <[EMAIL PROTECTED]> wrote:
> Oh, you wanted an answer? :) There's one in the FAQ above; here's another
> one:
>
> # Assume your two arrays are @main and @subset
> my %subset;
> @subset{@subset} = ();
> @main = grep !exists $subset{$_}, @main
>
> Cheers,
> Philip
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