MathGroup Archive 2006

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Re: Selecting Lists Without Null Results

Thanks Chris Chiasson, Jean-Marc Gulliet, Bob Hanlon, David Park, and  
Adriano Pascoletti for your help with this.  I guess it doesn't quite  
click with me why null results can be found using Equal (==) but  
cannot be excluded using Unequal (!=).  As pointed out, to do the  
latter, I must convert null results to strings, as "Null", use  
Unsame, or otherwise simply delete these cases.



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