##
$disp_table{'something'}->();
##
##
($disp_table{'not there'} || sub {})->();
##
##
one => sub { print "Number!\n" },
two => sub { print "Number!\n" },
three => sub { print "Number!\n" },
##
##
one => sub { print "The loneliest "; number() },
two => \&number,
three => \&number,