/oregontrail-v2-spring22-2

Primary LanguageJavaScript

OBJECT-ORIENTED PROGRAMMING: KEY TERMS

Abstraction

  • Describing something else in a simpler or more flexible way.
  • Indirection: Indirectly dealing with something, in the hopes of simplifying how we work with it, or working with it more flexibly, or without it having to be present.

Encapsulation

  • en-capsule: "putting something in a capsule/container and the benefits we get from it"
    • Grouping things together
    • You know where to find those things
    • You can make it more secure
  • Encapsulation is bundling data together, perhaps along with tools for working with that data, protecting the data from being accessed or changed unexpectedly.

Polymorphism

  • "poly-": multiple or many
  • "-morph-": change or variation or shape
  • Same command/message, possibly different results
  • Telling kids "It is time to go home": they may go to different places, by different means, but they all know to respond/react to the same message.
  • Telling animals to "speak"

Inheritance

  • Inheritance is a particular example of polymorphism in class systems, where you create a "Parent Class" (or, "Superclass") and one or more "Child Classes" (or, "Subclasses"). A child class should inherit the features of its parent class. And if the parent class itself has a parent class, then our child class should inherit the features of both parent classes.
  • Examples:
    • User Class
      • TrialUser Class
      • ContractorUser Class
      • ModeratorUser Class
        • AdminUser Class
          • SuperAdminUser Class
            • new SuperAdminUser()