Fix LinkedList removeAt()

src/_DataStructures_/LinkedList/index.js

@@ -121,30 +121,33 @@ class LinkedList {
     return node;
   }
 
-  removeAt(index) {
+  removeAt (index) {
     if (!this.head) {
-      return null;
+      return null
     }
-
-    if (index >= this.length()) {
+    if (index === 0) {
+      let returnNode=this.head;
+      this.head=this.head.next;
+      this.size -= 1;
+      return returnNode;
+    }
+    if (index >= this.size) {
       return this.removeFromEnd();
     }
 
     let address = this.head;
     let previous = address;
     let count = index;
 
-    while (count) {
-      address = address.next;
+    while (count !== 1) {
       previous = address;
+      address = address.next;
       count -= 1;
     }
 
-    const node = address;
-    previous.next = address.next.next;
+    previous.next = address.next;
     this.size -= 1;
-    node.next = null;
-    return node;
+    return address;
   }
 
   length() {