How does the array shift method work in JavaScript?

How does the array shift method work in JavaScript?

The shift() method removes the first element from an array and returns that removed element. It also changes the length of the array.

Can you show me an example of using shift in JavaScript?

Sure! Here's an example:

let fruits = ['apple', 'banana', 'cherry'];
let firstFruit = fruits.shift();
console.log(firstFruit); // Output: apple
console.log(fruits); // Output: ['banana', 'cherry']

What happens if I use shift on an empty array?

If you use shift() on an empty array, it will return undefined and the array will remain empty.

Are there any performance considerations when using shift?

Yes, using shift() can be less efficient for large arrays because it has to re-index the remaining elements after removing the first one.