From: Nuralanur@...
Date: 2006-03-04T00:23:29+09:00
Subject: Re: Array comparison returning nil

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Could it be that some of the elements in your arrays cannot be  compared,
like "a" and 1 ?
 
You can help this by mapping all these elements to numbers or strings,  which 
can be sorted, 
as in this example
 
a = ["three",3, "four",4]
c = ["ten",10,"eleven",11]
b=a.sort{ |x,y|  x.to_s <=> y.to_s}<=>c.sort { |x,y| x.to_s <=> y.to_s}
puts  "result is #{b}"
 
which gives a result -1, since 3 is smaller than 10.
 
Best regards,
 
Axel 


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