class Stack {
constructor() {
this.items = [];
}
// Push an element onto the stack
push(element) {
return this.items.push(element);
}
// Pop an element from the stack
pop() {
if (this.isEmpty()) {
return "Stack is empty";
}
return this.items.pop();
}
// Peek at the top element
peek() {
if (this.isEmpty()) {
return "Stack is empty";
}
return this.items[this.items.length - 1];
}
// Check if the stack is empty
isEmpty() {
return this.items.length === 0;
}
// Get the size of the stack
size() {
return this.items.length;
}
print() {
for (let i = 0; i < this.items.length; i++) {
console.log(this.items[i]);
}
}
// Clear the stack
clear() {
this.items = [];
}
}
const stack = new Stack();
stack.push(12);
stack.push(17);
stack.push(18);
stack.push(19);
stack.push(20);
stack.push(21);
console.log(stack.pop());
console.log(stack.items);
console.log(stack.peek());
console.log("size: " + stack.size());
console.log(stack.isEmpty());
stack.pop();
stack.print();
stack.clear();
console.log(stack.items);
/*
run:
21
[ 12, 17, 18, 19, 20 ]
20
size: 5
false
12
17
18
19
[]
*/
