Re: Re: Arrays which have properties of sets

the manual states, "The implementation in SplObjectStorage returns the same value as spl_object_hash()" - so I don't know how this would really work any better than a custom implementation. perhaps safer would be to simply implement a collection-type that requires the classes of elements in the collection to implement an interface, exposing a unique key... and for objects that don't have a unique key, generate sequential keys from a static counter in each class... not ideal if you want to implement a document store that can store "anything", since now every stored object/class needs to provide a key... On Sun, Oct 7, 2012 at 4:06 PM, Jared Williams <jared.williams1@ntlworld.com> wrote: > > See SPL's SplObjectStorage. That allows object instances as keys. > > Jared