-
Notifications
You must be signed in to change notification settings - Fork 84
/
circularLinkedListTS.ts
69 lines (59 loc) · 1.33 KB
/
circularLinkedListTS.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
/**
* Given a Linked List , Return True If list is Circular or Not
*/
class NodeTS {
constructor(public data: number, public next: any | null = null) {}
}
class CircularLinkedList {
head: null | any;
constructor() {
this.head = null;
}
insertFirst(data: number): void {
this.head = new NodeTS(data, this.head);
}
sizeOfList(): number {
let count = 0;
let firstNode = this.head;
while (this.head != null) {
this.head = this.head.next;
count++;
}
this.head = firstNode;
return count;
}
makeCircular(): void {
let firstNode = this.head;
while (this.head.next != null) {
this.head = this.head.next;
}
this.head.next = firstNode;
}
checkIfCircular(): boolean {
let slow = this.head;
let fast = this.head.next;
while (slow && fast) {
slow = slow.next;
fast = fast.next.next;
if (slow == fast) return true;
}
return false;
}
}
const nodeOne = new NodeTS(89);
let list = new CircularLinkedList();
list.head = nodeOne;
list.insertFirst(3);
list.insertFirst(5);
list.insertFirst(6);
list.insertFirst(3);
list.insertFirst(5);
list.insertFirst(6);
list.insertFirst(3);
list.insertFirst(5);
list.insertFirst(6);
list.insertFirst(3);
list.insertFirst(5);
list.insertFirst(88);
list.makeCircular();
console.log(list.checkIfCircular());