export class Stack<T> {
  private items: T[] = [];

  push(item: T): void {
    this.items.push(item);
  }

  pop(): T | undefined {
    return this.items.pop();
  }

  tryPeek(): boolean {
    return this.items.length > 0;
  }

  peek(): T | undefined {
    return this.items[this.items.length - 1];
  }

  toArray(): T[] {
    return [...this.items];
  }
}