chapter 04: [Queues and Deques]

Author: loiane

examples/chapter04/01-Queue.js

@@ -9,6 +9,6 @@ queue.enqueue('Camila');
 console.log(queue.toString()); // John,Jack,Camila
 console.log(queue.size()); // outputs 3
 console.log(queue.isEmpty()); // outputs false
-queue.dequeue();
-queue.dequeue();
+queue.dequeue(); // remove John
+queue.dequeue(); // remove Jack
 console.log(queue.toString()); // Camila

examples/chapter04/02-Deque.js

@@ -9,9 +9,9 @@ deque.addBack('Camila');
 console.log(deque.toString()); // John,Jack,Camila
 console.log(deque.size()); // outputs 3
 console.log(deque.isEmpty()); // outputs false
-deque.removeFront();
+deque.removeFront(); // remove John
 console.log(deque.toString()); // Jack,Camila
 deque.removeBack(); // Camila decides to leave
 console.log(deque.toString()); // Jack
-deque.addFront('John');
+deque.addFront('John'); // John comes back for information
 console.log(deque.toString()); // John,Jack

src/js/data-structures/queue.js

@@ -30,7 +30,7 @@ export default class Queue {
   }
 
   isEmpty() {
-    return this.count - this.lowestCount === 0;
+    return this.size() === 0;
   }
 
   clear() {

src/ts/data-structures/queue.ts

@@ -32,7 +32,7 @@ export default class Queue<T> {
   }
 
   isEmpty() {
-    return this.count - this.lowestCount === 0;
+    return this.size() === 0;
   }
 
   clear() {