$ perl -E 'say for @ARGV' file_1 file_2 file_1 file_2 #### $ perl -E 'my @x = @ARGV; say for @x' file_1 file_2 file_1 file_2 #### $ perl -E 'say for @ARGV' -file_1 -file_2 -i used with no filenames on the command line, reading from STDIN. #### $ perl -E 'say for @ARGV' -- -file_1 -file_2 -file_1 -file_2