Embedded Files
Finally, let’s use our new methods to access and manipulate data from Dog instances.
class Dog {
constructor(name) {
this._name = name;
this._behavior = 0;
}
get name() {
return this._name;
}
get behavior() {
return this._behavior;
}
incrementBehavior() {
this._behavior++;
}
}
const halley = new Dog('Halley');
In the example above, we create the Dog class, then create an instance, and save it to a variable named halley.
The syntax for calling methods and getters on an instance is the same as calling them on an object — append the instance with a period, then the property or method name. For methods, you must also include opening and closing parentheses.
Let’s take a moment to create two Dog instances and call our .incrementBehavior() method on one of them.
let nikko = new Dog('Nikko'); // Create dog named Nikko
nikko.incrementBehavior(); // Add 1 to nikko instance's behavior
let bradford = new Dog('Bradford'); // Create dog name Bradford
console.log(nikko.behavior); // Logs 1 to the console
console.log(bradford.behavior); // Logs 0 to the console
In the example above, we create two new Dog instances, nikko and bradford. Because we increment the behavior of our nikko instance, but not bradford, accessing nikko.behavior returns 1 and accessing bradford.behavior returns 0.
Instructions
Instructions
1.At the bottom of main.js, use console.log() to print the value saved to thename property of the surgeonRomero object.
2.Call .takeVacationDays() on surgeonRomero, with an input of 3.
3.After the call to .takeVacationDays(), use console.log() to print the value saved to the remainingVacationDays property of the surgeonRomero instance.
main.js
main.js
class Surgeon {
constructor(name, department) {
this._name = name;
this._department = department;
this._remainingVacationDays = 20;
}
get name() {
return this._name;
}
get department() {
return this._department;
}
get remainingVacationDays() {
return this._remainingVacationDays;
}
takeVacationDays(daysOff) {
this._remainingVacationDays -= daysOff;
}
}
const surgeonRomero = new Surgeon('Francisco Romero', 'Cardiovascular');
const surgeonJackson = new Surgeon('Ruth Jackson', 'Orthopedics');
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