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Re: Multi-Method closures

by bart (Canon)
on Sep 15, 2003 at 13:32 UTC ( [id://291550]=note: print w/replies, xml ) Need Help??


in reply to Multi-Method closures

It somewhat reminds me of Gnat's slides of the JAPH 2000 talk "Stages of a Perl programmer", especially "OOP without objects". Coincidence, I'm sure. :)

BTW I think the code in that slide has a memory leak. There seem to be circular references from $person to the subs, and back.

OTOH, yours doesn't, as you don't actually use the hash outside the closures.

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Re: Re: Multi-Method closures
by Limbic~Region (Chancellor) on Sep 15, 2003 at 13:46 UTC
    bart,
    Sort of, but I can say in all honesty that I didn't even get the idea, let alone any code, from those slides.

    As best as I can decipher the slides:

  • An anonymous hash is set up with a couple special keys
  • These keys are code refs that alter the hash itself
  • I think you would need a "method" key as an accessor/mutator for each "regular" key. If not, you could wipe out your own methods
  • You mentioned in the CB here that you thought this might be a memory leak (circular references) - I think the possibility exists

    My approach doesn't have the drawbacks of the last two points. Additionally, you can add additional lexicals in my technique as a way to add "pieces" to the pseudo object, so you are not limited to a single hash.

    Cheers - L~R

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