John,
> put url("file:users.txt") into tUserFile
Since you have read the entire file into memory you might also try filter
filter tUserFile with “tUsername,*”
if it’s empty then the name is unique.
You may be able to speed up subsequent searches by sorting the contents of the
file before writing it back to disk, which will put it in alphabetical order by
username, since that is the first word of each line.
Then subsequently you can use offset or lineoffset to quickly discard all the
lines up to the letter of the alphabet that begins the tUsername.
Another possibility 'read from file’ until (CR & “tUsername,”)
Jim Lambert
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