The approaches of tobyink and choroba sound like they are what you want (and they're certainly more sophisticated than my approach), but would the following be useful? 

>perl -wMstrict -e
"use 5.014;
 ;;
 package Foo {
   ;;
   sub new { bless [] };
   ;;
   sub msg {
     my $self = shift;
     my ($destination) = @_;
     printf qq{On my way to '%s'. }, $destination;
     my $coderef = $self->can($destination);
     return print qq{Cannot get there. \n} unless $coderef;
     $self->$coderef($destination);
     }
   ;;
   sub Berlin { my $self = shift;  print qq{I am in $_[0]! \n};  }
   ;;
   sub Paris  { my $self = shift;  print qq{Arrived in $_[0]! \n}; }
   ;;
   }
 ;;
 my $obj = Foo->new;
 $obj->msg('Berlin');
 $obj->msg('Paris');
 $obj->msg('London');
"
On my way to 'Berlin'. I am in Berlin!
On my way to 'Paris'. Arrived in Paris!
On my way to 'London'. Cannot get there.

[download]

Update: See perlobj, perltoot, perltooc for info on can(). (Update: perltoot and perltooc exist for Perl 5.14, but have been superceded for 5.18. So you're on your own...)

In reply to Re: Calling an intermediate method by AnomalousMonk
in thread Calling an intermediate method by trizen

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.