Can I write "empty" to a text file?

[Steve Bonham]

I've got my Rev stack writing data to an external file each time it is used.

Some times the data is 20 lines long some times it is only 10.

I've just realized that IF it had 20 lines previously and this time 
it only write 10-- lines 11 to 20 from the previous time are STILL in 
the file! This is a problem.

What's the solution?
Delete the file prior to opening (recreating) it again?
Is there an option to put or write empty into a file?

Thx,
S
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Steve Bonham
Director, Faculty Technology Development Laboratory
Center for Excellence in Teaching - Georgia Southern University
Statesboro, GA 30460-8143
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