Heads up! To view this whole video, sign in with your Courses account or enroll in your free 7-day trial. Sign In Enroll

Introduction to Design Patterns

Well done!

You have completed Introduction to Design Patterns!

Sign up for Treehouse Back to Library

Creational

6:24 with Craig Dennis

Let's explore the Creational design pattern category.

    Related Discussions

    Have questions about this video? Start a discussion with the community and Treehouse staff.

    Sign up

    was brought to you by the following object oriented design principle. 0:00
    When we choose to program to the interface and not the concrete implementation, 0:01
    we allow our code to be more extensible. 0:06
    The player who follows the proper protocol can be a part of the game. 0:08
    The rule goes on further to state. 0:12
    So how do we do that? 0:15
    How do we ensure that only create typed variables that we refer to the interface 0:16
    and not the concrete class? 0:20
    In loosely typed languages you know languages where you don't need to specify 0:23
    a variable's type like JavaScript or Python, this isn't really an issue. 0:27

    You need to sign up for Treehouse in order to download course files.

    Sign up

      You need to sign up for Treehouse in order to set up Workspace

      Sign up