Manipulate arrays with grace using JavaScript Object Methods
const numbers = [10, 20, 30, 40];
console.log(numbers);
(4) [10, 20, 30, 40]
console.log(numbers.push(50));
5
console.log(numbers);
(5) [10, 20, 30, 40, 50]
console.log(numbers.pop());
50
console.log(numbers.join('-'));
10-20-30-40
console.log(numbers.reverse());
(4) [40, 30, 20, 10]
console.log(numbers.indexOf(20));
2
console.log(numbers.slice(1, 3));
(2) [30, 20]
console.log(numbers.splice(1,2,60,70));
(2) [30, 20]
console.log(numbers);
[40, 60, 70, 10]