>>I want to index on the last three letters of a file name
>>and get a list indexed by file extension.
>
>
>Robert, I would be strongly inclined to store the extension in a separate field. I try to avoid using expressions in keys because they often defeat Rushmore optimization. Execute the code (as suggested) to extract the extension and store it separately and you won't ever have to do it again.
>
>Peter Robinson
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Hi Peter and thanks for the information :))))