Many thanks to all - I ended up doing it in Perl, actually.

perl -e ' ($file1, $file2) = @ARGV; $printed = 0; open F2, $file2;
while (<F2>) { $h2{$_}++ }; $count2 = $.; open F1, $file1; while
(<F1>) { if (! $h2{$_}) { print $_; $printed++; } } $count1 = $.; warn
"\nRead $count1 lines from $file1 and $count2 lines from
$file2.\nPrinted $printed lines found in $file1 but not in $file2\n\n"
' 1.txt 2.txt > 3.txt




On Dec 8, 12:29 am, Bill Hernandez <m...@mac-specialist.com> wrote:
> Two files and one script...
>
> I changed the script slightly.
>
> Have fun...
>
> Bill Hernandez
> Plano, Texas
>
> -- +---------+---------+---------+---------+---------+---------+---------+---- -----+
> ~/Desktop/bb_test/a.txt
> -- +---------+---------+---------+---------+---------+---------+---------+---- -----+
> Ham
> Cheese
> Tuna
> Lettuce
>
> -- +---------+---------+---------+---------+---------+---------+---------+---- -----+
> ~/Desktop/bb_test/b.txt
> -- +---------+---------+---------+---------+---------+---------+---------+---- -----+
> Salt
> Pepper
> Vodka
> Tuna
>
> -- +---------+---------+---------+---------+---------+---------+---------+---- -----+
> -- script_name : a_minus_b.scpt
> -- +---------+---------+---------+---------+---------+---------+---------+---- -----+
> on run
>         set a_path to (do shell script ("echo " & "~/Desktop/bb_test/a.txt"))
>         set b_path to (do shell script ("echo " & "~/Desktop/bb_test/b.txt"))
>
>         tell application "BBEdit"
>                 open (POSIX file a_path) as alias
>                 set a_props to get properties of text window 1
>                 set a_id to ID of a_props
>
>                 open (POSIX file b_path) as alias
>                 set b_props to get properties of text window 1
>                 set b_id to ID of b_props
>
>                 set myOptions to {search mode:grep, starting at top:true, wrap around:false, backwards:false, case sensitive:false, match words:true, extend selection:false}
>
>                 select text window id b_id
>                 set n to count lines of text of text window 1
>
>                 repeat with counter from 1 to n
>                         select text window id b_id
>                         select line counter of text of text window 1
>                         set search_str to contents of selection
>                         select text window id a_id
>                         replace search_str using "" searching in text 1 of text window 1 options myOptions
>                 end repeat
>
>         end tell
> end run
> -- +---------+---------+---------+---------+---------+---------+---------+---- -----+

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