Class Chapter Examples and Exercises

Author: Lbeckap

classes/chapter-examples/ClassExamples01.js

@@ -1,9 +1,10 @@
 //Try adding new properties inside constructor.
 class Astronaut {
-   constructor(name, age, mass){
+   constructor(name, age, mass, eyeColor){
      this.name = name;
      this.age = age;
      this.mass = mass;
+     this.eyeColor = eyeColor;
    }
 }
 
@@ -18,4 +19,11 @@ fox.color = 'red';
 console.log(fox);
 console.log(fox.age, fox.color);
 
-//Try modifying or adding properties below.
+//Try modifying or adding properties below.
+
+let beaver = new Astronaut('Beaver', 6, 14);
+console.log(beaver);
+console.log(Astronaut); //[class Astronaut]
+
+beaver.color = "brown";
+console.log(beaver);

classes/chapter-examples/ClassExamples02.js

@@ -14,4 +14,6 @@ let tortoise = new Astronaut('Speedy', 120);
 
 console.log(tortoise.name, tortoise.age, tortoise.mass);
 
-// What happens if we call Astronaut and pass in MORE than 3 arguments? TRY IT!
+// What happens if we call Astronaut and pass in MORE than 3 arguments? TRY IT!
+
+//It says undefined

classes/chapter-examples/Inheritance.js

@@ -20,4 +20,8 @@ class Tiger extends Panthera {
 
 let tigger = new Tiger();
 
-console.log(tigger);
+console.log(tigger);
+
+let tony = new Tiger();
+tony.brand = "Frosty Flakes";
+console.log(tony);

classes/exercises/ClassExercises.js

@@ -1,10 +1,50 @@
 // Define your Book class here:
-
+class Book {
+    constructor(title, author, copyrightDate, isbn, numOfPages, checkOutCount, isDiscarded) {
+        this.title = title;
+        this.author = author;
+        this.copyrightDate = copyrightDate;
+        this.isbn = isbn;
+        this.numOfPages = numOfPages;
+        this.checkOutCount = checkOutCount;
+        this.isDiscarded = isDiscarded;
+    }
+    dispose(currentYear) {
+        if (currentYear - this.copyrightDate > 5) {
+            this.isDiscarded = true;
+         }
+         if (this.checkOutCount > 100) {
+            this.isDiscarded = true;
+         }
+    }
+}
 
 // Define your Manual and Novel classes here:
+class Manual extends Book {
+    constructor(title, author, copyrightDate, isbn, numOfPages, checkOutCount, isDiscarded) {
+        super(title, author, copyrightDate, isbn, numOfPages, checkOutCount, isDiscarded);
+    }
+    checkout(num) {
+        this.checkOutCount += num;
+     }
+}
 
+class Novel extends Book {
+    constructor(title, author, copyrightDate, isbn, numOfPages, checkOutCount, isDiscarded) {
+        super(title, author, copyrightDate, isbn, numOfPages, checkOutCount, isDiscarded);
+    }
+}
 
 // Declare the objects for exercises 2 and 3 here:
+let prideAndPrej = new Novel('Pride and Prejudice', 'Jane Austen', 1813, '1111111111111', 432, 32, false);
+
+let topSecretManual = new Manual('Top Secret Shuttle Building Manual', 'Redacted', 2013, '0000000000000', 1147, 1, false);
+
+console.log(prideAndPrej,topSecretManual);
+// Code exercises 4 & 5 here:
+
+topSecretManual.checkout(5);
+topSecretManual.dispose(2024);
 
 
-// Code exercises 4 & 5 here:
+console.log(prideAndPrej, topSecretManual);