Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

Re^3: General pattern for interactive text-mode script?

by moritz (Cardinal)
on Jul 03, 2008 at 18:39 UTC ( #695432=note: print w/ replies, xml ) Need Help??


in reply to Re^2: General pattern for interactive text-mode script?
in thread General pattern for interactive text-mode script?

Here is some stupid example code that doesn't do anything useful, but should give you an idea of how such a dispatch table and a state automaton might work:

use strict; use warnings; my %states = ( main => { next => [ qw(intermediate end) ], on_enter => sub { print "You entered state main\n" }, }, intermediate => { next => [ qw(intermediate end) ], on_enter => sub { print "stupid side effect\n"; }, }, end => { next => [], on_enter => sub { print "Never called\n" }, }, ); my $current = $states{main}; while (@{$current->{next}}){ $current->{on_enter}->(); print "You can go to the following states from here:\n"; for (@{$current->{next}}){ print "\t$_\n"; } my $next = <STDIN>; chomp $next; if ($states{$next}){ # go to the next state: # TODO: check that this state transition is allowed $current = $states{$next}; } else { print "Sorry, don't understand your input, try again please\n" +; } }


Comment on Re^3: General pattern for interactive text-mode script?
Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://695432]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (19)
As of 2014-07-24 21:04 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    My favorite superfluous repetitious redundant duplicative phrase is:









    Results (167 votes), past polls