XPost: alt.comp.os.windows-10, alt.comp.microsoft.windows   
   From: klee@unibwm.de   
      
     23.03.2023 19:31, Maxmillian wrote:   
   > I have two long lists of email addresses in Windows 10 as text files.   
   >   
   > How can I lowercase everything and then get a diff of what email   
   > addresses are in one text file but not in the other text file?   
      
   Because you posted in alt.msdos.batch, here a batch solution:   
      
   @echo off   
      
   :: list all email addresses which are not in both   
   :: input files (email1.txt, email2.txt)   
      
   if [%1]==[sub] goto :sub   
   sort email1.txt|find "@" >email1s.txt   
   sort email2.txt|find "@" >email2s.txt   
   cmd /c %0 sub   
   del email1s.txt   
   del email2s.txt   
   goto :eof   
      
   :sub   
   setlocal EnableDelayedExpansion   
      
   3