From: Nuralanur@...
Date: 2006-05-16T18:23:09+09:00
Subject: In search of elegant indices searching

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Dear all,
 
I have a Hash, with equal-length Arrays as values, something like
 
my_hash={'x',[1,1,3,1,5,6],'w',[1,2,3,1,4,5],'y',[1,1,1,4,4,6],'z',[0,1,1,2,3,
4]}  .
 
Some of the values in the Arrays occur several times.
Now, I am looking for an elegant way to extract, for  all the values
of specified keys, all the indices
where one or more variables do not change their values, i.e.,  something
like
 
class Hash
    def fixed_vars(which_vars)
 
         # some elegant code
        return result
    end
end
 
res=my_hash.fixed_vars(['x','w'])
 
giving 
 
res={{'x'=>1,'w'=>1}=>[0,3],{'x'=>3,'w'=>3}=>[2],{'x'=>5,'w'=>4}=>[4],{'x'=>6,
'w'=>5}=>[5]}.
 
How could that be done?

Thank you!
 
Best regards,
 
Axel 
 
 

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