Got no idea how this works can anyone explain me

JavaScript
#1

Tell us what’s happening:

Your code so far


// Only change code below this line
class Thermostat {
 constructor (f) {
   this.f = f;
 }
 get temperature() {
   return (5/9) * (this.f -32);
 }
 set temperature(c) {  
   this.f = c * 9.0 / 5 + 32;
 }
}
// Only change code above this line

const thermos = new Thermostat(76); // Setting in Fahrenheit scale
let temp = thermos.temperature; // 24.44 in Celsius
thermos.temperature = 26;
temp = thermos.temperature; // 26 in Celsius
console.log()

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Challenge: Use getters and setters to Control Access to an Object

Link to the challenge:

#2

Since your question is quite broad, why don’t you tell us where are you having troubles? :slight_smile:

#3

this getter and setter , just understood to write them but dont know what exactly they do

#4

It’s pretty straightforward, they do what they claim to do…

This line calls the getter method, which does nothing but return the current temperature (converted to Celsius):

let temp = thermos.temperature; // 24.44 in Celsius

This line calls the setter method, which takes in a temperature (in Celsius) as argument, and sets the current temperature to its respective value in Fahrenheit:

thermos.temperature = 26;

The last line calls the getter method again:

temp = thermos.temperature; // 26 in Celsius
#5

is there anyway to check its working because console.log return same value or its not complete yet

#6

Could you rephrase that, I have no idea what you’re asking?

#7

This two line should be enough in telling you that is actually working.

You are passing 76 as a value but getting 24.44 back.
If you actually console it:

const thermos = new Thermostat(76); 
console.log(thermos)
// Thermostat { f: 76 }
// temperatureis correctly initialized as 76

// but when I actually get it
console.log(thermos.temperature);
// 24.44

So I’d say it’s working: it’s converting from 76F to 24C without me explicitly telling it to do so: as the user of your class I’m not calling some method to convertToCelsius(), you are doing it for me :slight_smile:

Hope it make more sense now.

#8

but when i console.log for thermos it is returning 78.8 and for thermos.temperature it is returning 84.4
dont know where are these values coming from
i didnt changed any value

#9