I have a new question dealing with OO programming.

Taking some advice from the O'Reilly book, Perl Cookbook, recipe 19.12, I've worked up a CGI program that uses a %hash to pick from a variety of functions.

I'd like to call these as methods, instead of just functions, but I can't figure out how. Likely, this has a simple solution.

Relevent code:

sub prepare {
  my $class = shift;
  my $quiz = bless { }, $class;
  $quiz->init(@_);
  return $quiz;
}

sub begin {
  my $quiz = shift;

# What should PopQuiz do?
my $switchbox = { 
    'show'   => \&Take_A_Quiz,
    'list'   => \&Quiz_List,
    'score'  => \&Score_Quiz,
    'submit' => \&Submit_Quiz,
};

  #  Pick Mode
  my $mode = $quiz->{params}{'__mode'} || 'list';

  #  Prepare the act to be performed
  my $act = $switchbox->{$mode};

  #  Perform
  &{$act}($quiz);
}

[download]

Instead of calling &{ $act }( $quiz ), I would like to call the method, $quiz->$act( ); -- or something like this? Normally, I call methods in this fashion:

$quiz->method;

In another subroutine, I am using a similar %hash to call other functions:

  my %valid_question = ( 
            'boolean' => \&parse_boolean,
            'multiple' => \&parse_multiple,
            'identify' => \&parse_identify,
            'essay' => \&parse_essay
               );

my $parse_type = $valid_question{ lc( $input ) };

[download]

Now, I want to call a method, but the only way I've figured out how to do it is this:

&{ $parse_type }( $quiz, @params );

I wish I could do this OO style, and not have to pass the object literally:

$quiz->$parse_type( @params );

I have a working example of the script online:

http://www.camandshayna.com/quiz/popquiz.cgi

Thanks,

~derek

In reply to Calling OO-method From A Hash by dejoha

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