gistfile1.txt

function Person(name, city){
  this.name = name;
  this.city = city;
}

Person.prototype.greet = function(){
  console.log("Hello my name is " + this.name);
}

function Developer(name, city, language){
  Person.call(name, city);
  this.language = language;
}

var nikhil = new Developer("Nikhil", "Pune", "Javascript");

console.log(nikhil);