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Re: Fun with Closures

by dada (Chaplain)
on Mar 26, 2003 at 08:11 UTC ( #245881=note: print w/replies, xml ) Need Help??


in reply to Fun with Closures

Schemer wrote:
# an object could manipulate itself &$object("add-msg", "get-self", sub {return $object});

I have to disagree with this one. you're not referring to "self" (in OO terms), but merely to the (lexical, in this case) variable $object. consider this:

my $object = make_object(); &$object("add-msg", "get-self", sub {return $object}); my $copy = $object; print &$copy("get-self"), "\n"; $object = 42; print &$copy("get-self"), "\n";
the output of this snippet is:
CODE(0x18350d8) 42
which shows that $copy is still an "object", but the second call to get-self returns the current value of $object (which is not an "object" anymore).

cheers,
Aldo

King of Laziness, Wizard of Impatience, Lord of Hubris

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