--fix: returning node in getFirst() & getLast() instead of value

Author: ashokdey

src/_DataStructures_/LinkedList/LinkedList.test.js

@@ -43,15 +43,15 @@ describe('Data Structures: Linked Lists', () => {
 
       it('Should return the 10 as the first element in the list', () => {
         list.addAtBeginning(10);
-        expect(list.getFirst(10));
+        expect(list.getFirst().data).toEqual(10);
       });
     });
 
     describe('addAtEnd(value)', () => {
       it('Should add element at end', () => {
         list.addAtBeginning(10);
         list.addAtEnd(12);
-        expect(list.getLast()).toEqual(12);
+        expect(list.getLast().data).toEqual(12);
       });
 
       it('Should add at the beginning if the list is empty', () => {
@@ -151,7 +151,7 @@ describe('Data Structures: Linked Lists', () => {
         list.addAtEnd(23);
         list.addAtEnd(33);
         list.addAtEnd(10);
-        expect(list.getLast()).toEqual(10);
+        expect(list.getLast().data).toEqual(10);
       });
     });
 
@@ -165,7 +165,7 @@ describe('Data Structures: Linked Lists', () => {
         list.addAtEnd(23);
         list.addAtEnd(33);
         list.addAtEnd(10);
-        expect(list.getFirst()).toEqual(15);
+        expect(list.getFirst().data).toEqual(15);
       });
     });
   });

src/_DataStructures_/LinkedList/index.js

@@ -57,21 +57,18 @@ class LinkedList {
     if (!this.head) {
       return null;
     }
-    return this.head.data;
+    return this.head;
   }
 
   getLast() {
     if (!this.head) {
       return null;
     }
-
     let address = this.head;
-
     while (address.next) {
       address = address.next;
     }
-
-    return address.data;
+    return address;
   }
 
   length() {