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JavaScript Object-Oriented JavaScript (2015) Prototypal Inheritance Setting Up the Prototype Chain

Daniel Wright
Daniel Wright
5,672 Points
Posted by Daniel Wright
Daniel Wright
5,672 Points

i cant figure out the answer

function Teacher(firstName, lastName, roomNumber) { Person.call(this, firstName, lastName); this.firstName = firstName; this.lastName = lastName; this.room = roomNumber; }

why is this not working? it says i dont need the firstname and lastname because the this takes care of that. when i take it away again it says i need it.

person.js 
function Person(firstName, lastName) {
  this.firstName = firstName;
  this.lastName = lastName;
}

Person.prototype.fullName = function() {
 return this.firstName + " " + this.lastName; 
};
teacher.js 
function Teacher(firstName, lastName, roomNumber) {
  Personcall(this, firstName, lastName);
  this.firstName = firstName;
  this.lastName = lastName;
  this.room = roomNumber;
}

1 Answer