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.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|