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Using list of indices

Title: Using list of indices
Hello. I have a list of indices for files in a folder and am looking for a better way to perform an action on just those files. Here is what I am doing now (which is inside a tell application “Finder” block):

    -- Compare the two folders
    set idx to {}
    repeat with i from 1 to c1
        if item i of names1 is not in names2 then
            set idx to idx & i
        end if
    end repeat
    
    try
        repeat with i from 1 to (count of idx)
            set label index of file (item i of idx) of folder1 to 5
        end repeat
    end try

Note that the variables names1 and names2 are not the file names from the files in the two folders, but rather parsed versions of the file names. (They must be parsed before comparison.) After I do the comparison, I need to related the found indices to the files themselves.

I’m looking for a way to perform either or both of the above steps with the loop. For example, I know I can say:

set label index of every file of folder1 to 5

How can I do that with just specific files?

Thanks in advance!

--
Ken Fleisher

Photographer
Imaging & Visual Services
National Gallery of Art
Washington, D.C.

Phone: (202) 712-7471
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