JavaScript Objects Lesson

This lesson introduces the concepts of objects in JavaScript, their importance, and practical applications.

Objectives

By the end of this lesson, students will be able to:

• Explain what objects are and how they represent real-world concepts.
• Create objects with properties and methods.
• Access and modify object properties.
• Call methods on objects to perform actions.

Problems

The following problems are designed to reinforce object concepts:

1. The Pet Store

• Create objects to model different pets (dogs, cats, etc.).
• Each pet object should have properties (type, name, age, breed, color).
• Include a makeSound() method to output a sound appropriate for the animal.

2. Student Records

• Create an array to store multiple student objects.
• Each student object should have properties (firstName, lastName, gradeLevel, courses).
• Include the following methods:
  • getFullName(): Returns the student's full name.
  • addCourse(): Adds a new course to the student's course list.

3. Recipe Manager

• Model recipes using objects with the following properties:
  • title
  • servings
  • ingredients (an array of ingredient objects)
• Each ingredient object should have properties (name, quantity, unit).
• Include a scaleRecipe() method to adjust ingredient quantities based on servings.

4. Library System

• Design objects to represent books, patrons, and the library itself.
• Book:
  • title
  • author
  • ISBN
  • available (true/false)
• Patron:
  • name
  • libraryCardNum
  • booksOut (array of borrowed books)
• Library:
  • name
  • inventory (array of books)
• Include methods like:
  • checkOutBook(patron, book)
  • returnBook(book)

Additional Notes

• Encourage students to start with simple object structures and gradually add complexity.
• Emphasize the use of console.log for testing and debugging.
• Discuss the connection between objects and the concept of classes/blueprints (if time permits).