JSFiddle - React, Tailwind, and code Playground

by deepak sisodiya

HTML

<p>Question 1</p>

JavaScript

// Question 1

function MyArray() {
  var b = Array.apply(this , arguments);
  b.__proto__ = MyArray.prototype;
  return b;
}

MyArray.prototype = Object.create(Array.prototype);

MyArray.prototype.add = function(value) {
  this.push(value);
};
MyArray.prototype.addAll = function() {
  if(typeof arguments[0] == "object") {
     var x;
     for(x in arguments[0]) {
        this.add(arguments[0][x]);
      }
  }else {
     for(var i=0; i < arguments.length; i++) {
     this.add(arguments[i]);  
    }
  }
};


var collection = new MyArray(1, 2, 3, 4); 

  
alert(collection instanceof Array);    //true 
alert(collection instanceof MyArray);  //true 
  
alert(collection);                     //[1,2,3,4]; 
alert(collection.length);              //4 
collection.add("hello"); 
alert(collection[4]);                  //"hello" 
alert(collection.length);              //5 
  
collection.push("world"); 
 
alert(collection.length);              //6 
alert(collection[5]);                  //world 
  
collection.addAll(["java", "script"]); 
  
alert(collection.length);              //8 
alert(collection);                     //[1,2,3,4,"hello", "world", "java", "script"]
collection[8] = "last"; 
alert(collection.length);              //9 
alert(collection.pop());               //"last"
alert(collection.length);              //8 
  
alert(Array.prototype.addAll);         //undefined

var alert  = function (str) {
   var st = document.createTextNode(str);
   var p = document.createElement('p');
   p.appendChild(st);
   document.querySelector('body').appendChild(p);
}