Matching files in 2 folders

Question

I have two folders that should have the same number of files after performing a Save As into a second folder action. The first folder has 448 large tiffs, the other has 447 low-res jpegs. The file names are the same apart from the extension.
Is there a script to run that can find the rogue tiff in folder number one that wasn't saved as a jpeg into folder two? Surely this is a simple 'folder match' function?
If this is a job for Automator, or Spotlight I will leave this post in their respective forums.
Thanks.
Richard.

Answer 1

Here's a quick solution. The following script strictly considers everything to the left of the last period in each filename. Select the folder with more items in the first dialog, the folder with less items in the second. The results of the comparison are written to the script editor's result pane.
click here to open this script in your editor<pre style="font-family: 'Monaco', 'Courier New', Courier, monospace; overflow:auto; color: #222; background: #DDD; padding: 0.2em; font-size: 10px; width:400px">return missingitems(stripext(list folder (choose folder)), strip_ext(list folder (choose folder)))
to missingitems(lista, list_b)
set missing_items to {}
repeat with an_item in list_a
if an_item is not in list_b then set end of missing_items to an_item's contents
end repeat
return missing_items
end missing_items
to stripext(afolder)
set z to {}
repeat with x in a_folder
set x to x's contents
set y to offset of "." in (reverse of x's characters as Unicode text)
if y > 0 then
tell x to set end of z to text 1 thru (-y - 1)
else
set end of z to x
end if
end repeat
return z
end strip_ext</pre>