Does anyone know a better way of doing this type o...

# announcements

[sonofblip]

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
}

[streetsofboston]

I guess var x is a property, not a local variable.

If so, do

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

[PHondogo]

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

theNullCase() - can happen if function functionThatTakesNonNullableIntegerArgument(it) return null , but it is not of original code semantics

[sonofblip]

💯 thanks!!

[PHondogo]

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

[PHondogo]

if result is not needed

[Dico]

This is only necessary if x has a custom getter or it is mutable

[dave]

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