kotlin

How to make variable return different values on access?

I have a homework question "Implement a val property that returns a different value on each access"

I can imagine how I can return different values with function, but not with variable. Is there some "linux-like" link to this function in Kotlin I should make?

Solution

  • This is a simple example. I recommend reading Kotlin's documentation on getters and setters.

    class CustomGetter {
    private var underlyingField: Int = 0

    private var alwaysHigher: Int = this.underlyingField
    get() {
        this.underlyingField++
        field = underlyingField
        return field
    }
}