Does anyone know a better way of doing this type of thing? using

!!

always makes me feel icky

val x: Int? = getAnIntegerOrMaybeANullFromAPlaceO
if (x != null) {
    functionThatTakesNonNullableIntegerArgument(x) // won't compile because it thinks x is nullable
    functionThatTakesNonNullableIntegerArgument(x!!) // will compile because added !!
} else {
    // handle the null case
}

I guess

var x

is a property, not a local variable. If so, do

x?.let {
    functionThatTakesNonNullableIntegerArgument(it)
} ?: theNullCase()

x?.let { functionThatTakesNonNullableIntegerArgument(it) } ?: theNullCase() theNullCase() - can happen if function functionThatTakesNonNullableIntegerArgument(it) return null , but it is not of original code semantics

💯 thanks!!

x?.let { functionThatTakesNonNullableIntegerArgument(it) 1 } ?: theNullCase()

This is only necessary if

x

has a custom getter or it is mutable

Could use a method reference here instead maybe to tidy up?