Why doesn't the simple-minded method work?
#!/usr/bin/perl -w
# State transition table
#
# Current Inputs Next Action
$next{'initial'}{'left' } = ['red', sub { print "Red \n"} ];
$next{'initial'}{'right'} = ['blue', sub { print "Blue\n"} ];
$next{'red'} {'left' } = ['blue', sub { print "Blue\n"} ];
$next{'red'} {'right'} = ['end', sub { print "End \n"} ];
$next{'blue'} {'left' } = ['blue', sub { print "Blue\n"} ];
$next{'blue'} {'right'} = ['red', sub { print "Red \n"} ];
$next{'end'} {'left' } = ['end', sub { print "End \n"} ];
$next{'end'} {'right'} = ['end', sub { print "End \n"} ];
@arbitrary_inputs = qw/left left right left left right right left/;
$state = 'initial';
for (@arbitrary_inputs)
{
$action = $next{$state}{$_}->[1];
$action->();
$state = $next{$state}{$_}->[0];
}
-- All code is 100% tested and functional unless otherwise noted.
