The Goal: Use the class keyword to create a Thermostat class. The constructor accepts a Fahrenheit temperature. In the class, create a getter to obtain the temperature in Celsius and a setter to set the temperature in Celsius.
Here's my code so far:
class Thermostat {
constructor(fahrenheit){
this.fahrenheit = fahrenheit;
}
get temperature(){
const inCelcius = 5/9 * (this.fahrenheit - 32) ;
return inCelcius;
}
set temperature (temperatureInCelcius){
this.fahrenheit = temperatureInCelcius;
}
}
const thermos = new Thermostat(76); // Setting in Fahrenheit scale
let temp = thermos.temperature; // should show 24.44 in Celsius
console.log(temp);
thermos.temperature = 26;
temp = thermos.temperature; // should show 26 in Celsius but right now showing -3.333
console.log(temp);
I know the correct solution is to change this.fahrenheit = temperatureInCelcius; into this.fahrenheit = (celsius * 9.0) / 5 + 32;
But I don’t understand why. I've been told that my code is missing a conversion.
My questions are:
thermos.temperature = 26; My understanding is that when the compiler sees that line, it invokes this line inside the constructorset temperature (temperatureInCelcius){
this.fahrenheit = temperatureInCelcius;
}
and then put 26 into the argument (temperatureInCelcius), then set the property value of this.fahrenheit to 26.
Just want some explanation cause it feels like I am missing something. Would greatly appreciate your help! <3
When you do temp = thermos.temperature;, get temperature() is called and for thermos.temperature = 26; set temperature() is called.
// thermos.temperature = 76
const thermos = new Thermostat(76);
// this calls get temperature() and return 24.44
// 5/9 * (76 - 32) = 24.44
let temp = thermos.temperature;
console.log(temp); // 24.44
// this calls set temperature() and sets thermos.temperature = 26
thermos.temperature = 26;
// this calls get temperature() and return -3.333
// 5/9 * (26 - 32) = -3.333
temp = thermos.temperature;
console.log(temp); // -3.33