From: James Dechiaro <jdechiaro@...>
Date: 2008-05-14T20:29:21+09:00
Subject: Re: array diff

Thanks for the tip Robert I will give it a go...as the script has been
running for over 14 hours now after finding 13k matches =(

Robert Klemme wrote:

> You might also want to consider using Set or Hash for more efficient
> lookups.  The way I would probably do it is this: define a record type
> that covers all the relevant information (easily done with Struct).
> Then read the file to test against (csv2 I believe) and convert
> records to the record type which you then add to the Set / Hash.  Then
> read the second file line by line, convert it and print it if it is
> not contained in the Set / Hash.  That way you do not need to keep
> both files in memory and the Set / Hash lookups are much faster than
> Array based lookups.
> 
> Kind regards
> 
> robert
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