FAQ: Classes - Review: Classes


#1

This community-built FAQ covers the “Review: Classes” exercise from the lesson “Classes”.

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This exercise can be found in the following Codecademy content:

Web Development

Introduction To JavaScript

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#2

Hey all, my question relates to the following code, where I’ve attempted to create a new Doctor class under the HospitalEmployee super class. Everything seems to work ok, however I also added an ‘addInsurance’ method which returns an error when invoked ‘is not a function at doctor.addInsurance’ . Does anyone know why this is the case?
Code:
class Doctor extends HospitalEmployee {
constructor(name, insurance) {
super(name);
this._insurance = insurance;
}
get insurance() {
return this._insurance;
}
addInsurance(data){
this.insurance.push(data);
}
}


#3

It looks like this._insurance is a singular value, not an array. We cannot push to a non-array object.


#4

Oh that makes perfect sense now! Thanks Roy