Another minor suggestion AFTER you cleared up like rovf suggested:
Code will be more transparent if you store the filenames in an array:
 @files = <file1>
Than you can make the foreach  $file(@files) loop and grep, storing the results in a simple array, or file, as you wish.

In reply to Re: Compare multiple files and output differences by nemesdani
in thread Compare multiple files and output differences by prescott2006

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