$ perl -le " my %f = qw/ path 1  options 1 arguments 1 /; print join q/ /, keys %f; "
options arguments path

$ perl -le " my %f = qw/ path 1  options 1 arguments 1 /; print join q/ /, sort keys %f; "
arguments options path

##</code><code>##

$ perl -le " my %f = qw/ arguments 1 options 1 path 1 /; print join q/ /, keys %f; "
options path arguments

$ perl -le " my %f = qw/ arguments 1 options 1 path 1 /; print join q/ /, sort keys %f; "
arguments options path