http://www.perlmonks.org?node_id=1090343


in reply to comparing 2 files and creating third file with uncommon content

And just for the purpose of completing the non-perl answers, you could use also other commands (i.e to compare between three files at same time use either $ diff3 in bash, or M-x ediff3 in emacs)
  • Comment on Re: comparing 2 files and creating third file with uncommon content