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That's a very confusing example because it looks like an object but isn't. That example would still work if you remove the OO looking stuff:
#!/usr/local/bin/perl use strict; my $dave = subref("dave", "oranges", "grapefruit"); $dave->("debug message"); sub subref { my (@stuff) = @_; return sub { doit(@stuff, @_) }; # <-- closure here? } sub doit { print shift, ": ", join(",", @_), "\n"; }
Yes, it is a closure, but it's also an anonymous sub ref, so it's showing multiple things. Here's a much simpler closure:
my $foo; sub bar { $foo++; }
After execution, bar() has a private copy of $foo. TheDamian uses this in his book to do private variables for classes.

In reply to Re: Why are closures cool, continued? by perrin
in thread Why are closures cool, continued? by mr.dunstan

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