// Array polyfills

// push, pop, shift, foreach, split, find

// 1. Implement a polyfill for the Array.prototype.push() and Array.prototype.pop() method in JavaScript.

// The Array.prototype.push() method adds one or more elements to the end of an array and returns the new length of the array.

// The Array.prototype.pop() method removes the last element from an array and returns that element.

// This operation changes the length of the array.

Array.prototype.myPush= function(number){

this[this.length]=number;

return this.length;

}

console.log([1,2,3,4,5].myPush(80)); // 6

Array.prototype.myPop= function(){

let lastEle= this[this.length-1];

this.length=this.length-1;

return lastEle;

}

console.log([1,2,3,4,5].myPop()); // 5