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// linkedlist
// hides scope from global access
(function() {
function LinkedList() {}
LinkedList.prototype = {
length: 0,
head: null,
tail: null
};
LinkedList.Node = function() {}
LinkedList.Node.prototype = {
val: null,
prev: null,
next: null
};
LinkedList.prototype.add = function(v) {
var newNode = new LinkedList.Node();
newNode.val = v;
newNode.next = this.head;
if (this.head == null)
this.tail = newNode;
else
this.head.prev = newNode;
this.head = newNode;
this.length++;
// for mutiple call chaining
return this;
}
LinkedList.prototype.remove = function() {
}
LinkedList.prototype.size = function() {
console.log(this.length);
}
LinkedList.prototype.print = function() {
var curr = this.head;
var res = [];
while (curr) {
res.push(curr.val);
curr = curr.next;
}
console.log(res.join(" -> "));
}
var ll = new LinkedList();
var ll2 = new LinkedList();
ll.add(7).add(12).add(13).add(21);
ll.print();
ll.size();
ll2.add(70).add(120).add(130);
ll2.print();
ll2.size();
})();
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