Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
What if I could make the base class dog smarter and have it instantiate the subclasses for me?

For those who don't know this approach of having a single class instantiate different subclasses depending on the arguments is a common design pattern called an Abstract Factory (or sometimes Kit). If you keep an eye out you'll start seeing it everywhere (e.g. DBI instantiates different classes depending on the arguments to connect).

Class::Factory provides a little framework for rolling this sort of stuff together if you don't want to do it yourself.


In reply to Re: It's a dog, but what kind? (polymorphism , in Perl OO) by adrianh
in thread It's a dog, but what kind? (polymorphism , in Perl OO) by blue_cowdawg

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



  • 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 or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others pondering the Monastery: (5)
As of 2021-05-13 22:45 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Perl 7 will be out ...





    Results (144 votes). Check out past polls.

    Notices?