reimplementing #= and #hash

Hi List,

I have a Class PoolQueue which has instvars 'member' and 'processor'. I find that an instance of PoolQueue when placed in an OrderedCollection can no longer be considered equal. I suppose I have to reimplement #= and #hash to allow PoolQueue instances to be compared. 

My problem: how do I implement #hash? Or stated another way, what does #hash accomplish?

Thanks in advance.

Ching.
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