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Along the lines of Juerd's code, but with implicit recursion and much less array index math (which I hate with a passion):
sub menu { my ($title, @option) = @{ shift }; my (@name, @action); ($name[@name], $action[@action]) = splice @option, 0, 2 while @option; while(1) { print "\n$title\n"; print map "$_. $name[$_ - 1]\n", 1 .. @name; print '> '; chomp (my $choice = readline *STDIN); if ($choice and $choice > 0 and $choice <= @action) { my $do_action = $action[$choice]; return unless defined $do_action; $do_action->() if 'CODE' eq ref $action; $menu($action) if 'ARRAY' eq ref $action; require Carp; Carp::croak "I don't know what to do with $action"; } else { print "Invalid choice: $choice\n" } } }
Now you can still very similarly say
#!/usr/bin/perl -w use strict; sub foo { print "FOO!\n" } sub bar { print "BAR!\n" } sub menu { ... } my ($mainmenu, $submenu); $submenu = [ 'Submenu', 'Bar', => \&bar, 'Back to previous menu' => undef, ]; $mainmenu = [ 'Main menu', 'Foo' => \&foo, 'Submenu...' => $submenu, 'Exit' => undef, ]; menu($mainmenu);
but you can also much more concisely say
menu([ 'Main menu', 'Foo' => \&foo, 'Submenu...' => [ 'Submenu', 'Bar', => \&bar, 'Back to previous menu' => undef, ], 'Exit' => undef, ]);

Makeshifts last the longest.

In reply to Re: Simple text menu by Aristotle
in thread Simple text menu by del

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