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JavaScript Object-Oriented JavaScript Getters and Setters Creating Getter Methods

Posted by Joseph Gleiter
Joseph Gleiter
4,664 Points

Bummer: It looks like your getter method is not returning a value.

this works in chrome but not in treehouse

creating_getters.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 <= 90 && this.credits >= 61){return 'Junior';}
    else if(this.credits <= 60 && this.credits >= 31){return 'Sophomore';}
    else if(this.credits < 30){return 'Freshman';}
  }
}

const student = new Student(3.9, 8);

student.level;

2 Answers

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

There's just one value for which this method returns no value, and the challenge checker just happened to try it (but you didn't when working in Chrome)! Look over your logic and see if you can spot it.

Suggestion: one way to guarantee a value is always returned is to use a plain "else" at the end instead of another "else if". And in this case, since all the other conditions cause a return, you can even omit the "else" entirely.

Spoiler: The value which is not caught by the tests when spelled out backwards is "ytriht". :wink:

Daniel Amazigo
PLUS
Daniel Amazigo
Courses Plus Student 11,357 Points
Daniel Amazigo
Daniel Amazigo
Courses Plus Student 11,357 Points

Hi Joseph, this is coming a lot later than when you posted your question.

Steven's absolutely right. I just did the challenge myself. I was doing something similar, when I realised the last "else if" was not necessary.

Also, thought I'd share - because a hidden challenge was to write the conditions as simply as possible - that this could also be done using ternary operators (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Conditional_Operator).

So, what is seen below would give the same result as using regular "if, else if, else".

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

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

    get level() {
      return this.credits > 90 ? 'Senior'
         : this.credits <= 90 && this.credits >= 61 ? 'Junior'
         : this.credits <= 60 && this.credits >= 31 ? 'Sophomore'
         : 'Freshman';
    }  
}

const student = new Student(3.9);