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iOS Intermediate Swift 2 Properties Computed Properties

Boris Likhobabin
Boris Likhobabin
3,581 Points

What the setter in computed value tells us?

var celsius: Double = 0

var fahrenheit: Double {
get {
    return (celsius * 1.8) + 32
} set myValue { 
    (myValue - 32 ) / 1.8
    }
}

fahrenheit // prints 32

In this example: We use get intuition tells "this is how we get the fahrenheit property, we take celcius ...." but with a setter I'm a little confused: Say we want to set the fahrenheit to the value of newValue and we do , but why we need to do the opposite (converting this new value back to celcius in the setter block? WHAT IS THE POINT OF THIS? Thanks in advance