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JavaScript Object-Oriented JavaScript Getters and Setters Creating Setter Methods

Posted by Nas Jones
Nas Jones
7,849 Points

Unanswered question

I watched the setter video before this and i was lost.

set owner(owner) { this._owner = owner; console.log(setter called: ${owner}); }

If you look at this code i see four different places where "owner" was used before it was logged in the console, why were they used in each instance?. I also don't understand why the "_" was necessary. Also, in this challenge i'm confused as well, all i got out of it was an if statement i don't know what to do further. Also, if this can be explained simply that would help me better instead of using complex words and code

creating_setters.js 
class Student {
    constructor(gpa, credits){
        this.gpa = gpa;
        this.credits = credits;
    }

    stringGPA() {
        return this.gpa.toString();
    }

    get level() {
        if (this.credits > 90 ) {
            return 'Senior';
        } else if (this.credits > 60) {
            return 'Junior';
        } else if (this.credits > 30) {
            return 'Sophomore';
        } else {
            return 'Freshman';
        }
    }
}

var student = new Student(3.9, 60);

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

In your example, the setter method name is "owner", but the parameter passed to it is also named "owner". There is also a variable named "_owner" (the underscore is just part of the name). This is a common way to name variables that are used to hold the value passed in. A variable used and named this way is often called a "backing property".

It doesn't look like you've started any code yet, and none of these things apply to the first task of this challenge. But you will create a backing property when you get to task 2, along with some conditional code to implement the instructions.

Nas Jones
Nas Jones
7,849 Points

Hello thank you for the help