I want to be able to take a few newly transferred .BAS file that come from an old retrocomputing platform and see if it is already on my computer.
I have many subfolders and in each subfolder there are several .ZIP files. Inside the .zip files are the .BAS files I want to compare these files to. I would like to know: (1) if the exact same file is in one of the archives and (2) magically, if the file is about the same--"within 90% the same" as any of the files in the archive. (How that's done... anything close would be neat.)