gistfile1.js

function Human (sex, age, name) {
     this.sex = sex;
     this.age = age;
     this.name = name;
     
}

Human.prototype.say = function() {
  console.log('my name is ' + this.name);
};

sergey = new Human('male', 25, 'Segey');
sergey.say();

function Man(age, name) {
  this.age = age;
  this.name = name;
}

Man.prototype = new Human('man', this.age, this.name)