Filtering one list out of another

[Dick Kriesel]

Hi, Devin.  Here's a version that uses arrays for speed.	

command difference @rList1, @rList2
    local tArray1, tArray2
    repeat for each line tLine in rList2
        put "true" into tArray2[ tLine ]
    end repeat
    repeat for each line tLine in rList1
        if not tArray2[ tLine ] then
            put "true" into tArray1[ tLine ]
        end if
    end repeat
    put the keys of tArray1 into rList1
end difference

-- Dick