Code QuizAdvanced

Stack Pop Bug

Spot the bug in a simple array-based stack implementation.

Codejavascript

class Stack {
  constructor() {
    this.items = [];
  }

  push(value) {
    this.items.push(value);
  }

  pop() {
    return this.items.shift();
  }

  peek() {
    return this.items[this.items.length - 1];
  }
}

const s = new Stack();
s.push(1);
s.push(2);
s.push(3);
console.log(s.pop());

This stack is supposed to be LIFO, but pop() misbehaves. What is the bug?

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