From: Jamal Soueidan <jamal@...>
Date: 2011-01-15T07:39:21+09:00
Subject: Re: array dynamic intersection and union

Hello Rob,

Sorry I did not explain myself first time.

But I let us say I have these hashes.

rule = {:array => [1,2,3,4], :condition => "AND"}
rule2 = {:array => [1,2,3,4], :condition => "OR"}
rule3 =  {:array => [3,4]}

How can I intersection and union based on the conditions in the hash 
through them all?

So it end up like this

array = rule[:array] & rule2[:array] | rule3[:array]

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