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JavaScript Object-Oriented JavaScript Getters and Setters Creating Getter Methods

Posted by Kosta Kuts
Kosta Kuts
15,894 Points

Why if I try to use method instead of getter Node returns the whole thing back?

I'm a bit confused about the result of my little experiment. I tried to use method instead of getter because honestly, I don't see the difference. But apparently here's the difference. Can someone explain to me why it returns the whole method instead of the result? What's wrong with using a method for this particular task? There's this line when you should use a getter instead of method?

here's the result of this script in console: treehouse:~/workspace$ node students.js
31
Level getter: Sophomore
Level method: levelMethod(){
var level;
if ( this.credits > 90 ) {
level = 'Senior';
} else if ( this.credits > 60 ) {
level = 'Junior';
} else if ( this.credits > 30) {
level = 'Sophomore';
} else { level = 'Freshman'; }
return level;
}

creating_getters.js 
class Student {
    constructor(gpa, credits){
        this.gpa = gpa;
        this.credits = credits;
    }
get level(){
    var level;
    if ( this.credits > 90 ) {
        level = 'Senior';
       } else if ( this.credits > 60 ) {
                  level = 'Junior';
       } else if ( this.credits > 30) {
         level = 'Sophomore';
       } else { level = 'Freshman'; }
return level;         
}

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

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

    }
}

const student = new Student(3.9, 31);

console.log( student.credits);
console.log('Level getter: ' + student.level);
console.log('Level method: ' + student.levelMethod);

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,967 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,967 Points

Try:

console.log('Level method: ' + student.levelMethod());

() invokes the method. Without () the definition is returned.

Kosta Kuts
Kosta Kuts
15,894 Points

hey Kris, thanks for the response. Does that mean that get method call do not require parenthesis?