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JavaScript Object-Oriented JavaScript Getters and Setters Creating Setter Methods

Posted by Seth Pabst
Seth Pabst
10,285 Points

Can't understand Set & Get methods

I have no idea how to code this problem, I don't understand get & set

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';
        }
    }

    get major() {
      if(this.level === 'Junior' || this.level === 'Senior') {
        this._major = major;
        return this._major;
      }
      else if(this.level === 'Freshman' || this.level === 'Sophomore') {
        this._major = none;
        return this._major;
      }
    }

    set major(major) {
      this._major = major;
    }
}

var student = new Student(3.9, 60);

1 Answer

David Evans
David Evans
10,490 Points
David Evans
David Evans
10,490 Points

Hi Seth, you are very close.

First, your get major() should actually be your setter. The challenge doesn't ask you to create a get for the major, only a setter.

After that, the rest if your code is also fairly close. The challenge states that if the student is a freshman or sophomore, to set their major back to 'None'. Make a special note that this should be the string 'None'.

That would make your code as the following which should get you through the challenge:

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';
        }
    }

    set major(major) {
      if(this.level === 'Junior' || this.level === 'Senior') {
        this._major = major;
        return this._major;
      }
      else if(this.level === 'Freshman' || this.level === 'Sophomore') {
        this._major = 'None';
        return this._major;
      }
    }
}

var student = new Student(3.9, 60);