Use of Boolean? in if expression

Question

If I have a nullable Boolean b, I can do the following comparison in Java:

Boolean b = ...;
if (b != null && b) {
   /* Do something */
         


        

Answer 1

From what I've seen the Boolean? is a result of a method that returns Boolean on an object that is nullable

val person: Person? = null
....
if(person?.isHome()) { //This won't compile because the result is Boolean?
  //Do something
}

The solution I've been using is to use the let function to remove the possible returned null value like so

person?.let {
  if(it.isHome()) {
    //Do something
  }
}