mvp bfltarrayqueue

Author: shadowcodex

lib/queues.js

@@ -109,21 +109,31 @@ class BFltArrayQueue {
     if (isFull()) {
       throw new Error('Enqueue attempted on a full queue.');
     } else {
-      this.rear = (this.rear + 1) % queue.length;
-      queue[this.rear] = data;
+      this.rear = (this.rear + 1) % this.queue.length;
+      this.queue[this.rear] = data;
       this.length++;
     }
   }
 
   dequeue() {
     if (isEmpty()) {
       throw new Error('Dequeue attempted on empty queue.');
+    } else {
+      const toReturn = this.queue[this.front];
+      this.queue[this.front] = null;
+      this.front = (this.front + 1) % this.queue.length;
+      this.length--;
+      return toReturn;
     }
   }
 
-  peek() {}
+  peek() {
+    return this.queue[this.front];
+  }
 
-  length() {}
+  length() {
+    return this.length;
+  }
 }
 
 /**