working eyes!

src/Util/LinkedList.js

@@ -0,0 +1,43 @@
+class LinkedList {
+    constructor() {
+        this.head = null;
+        this.size = 0;
+    }
+    push(obj) {
+        var el = new Element(obj, null, this.head);
+        if (this.head != null){
+            this.head.prev = el;
+        }
+        this.head = el;
+        this.size ++;
+    }
+    clear() {
+        var cur = this.head;
+        while(cur != null){
+            this.remove(cur);
+            cur = cur.next;
+        }
+        this.size = 0;
+    }
+
+    remove(element){
+        if (element.prev != null){
+            element.prev.next = element.next;
+        }
+        else if (this.head == element){
+            this.head = element.next;
+        }
+        if (element.next != null){
+            element.next.prev = element.prev;
+        }
+        this.size--;
+    }
+}
+
+class Element {
+    constructor(obj, prev, next){
+        this.obj = obj;
+        this.prev = prev;
+        this.next = next;
+    }
+}