How do I: 
@ARGV = ( $file_1 $a,$b | $file_2 $c,$d )

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The single letter variables are specific header labels. I just want to open each file and: 
%first_file = (a => data in this column, b => data in this column)
%second_file = (c => data in this column, d => data in this column)

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In reply to @ARGV Manipulation by Limo

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