Look at $ARGV which contains the current file name.

And you could avoid the eskimo kiss if you want with something like: perl -lne '/^([^\t]*)\t/ and not $h{$1}++ and print $1'

In reply to Re^3: Enclosing one-liner in a bigger loop - unix by Eily
in thread Enclosing one-liner in a bigger loop - unix by baxy77bax

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