Multiple variable let in Kotlin

Question

Is there any way to chain multiple lets for multiple nullable variables in kotlin?

fun example(first: String?, second: String?) {
    first?.let {
        se         


        

Answer 1

I actually prefer to solve it using the following helper functions:

fun  T(tuple: Pair): Pair? =
    if(tuple.first == null || tuple.second == null) null
    else Pair(tuple.first!!, tuple.second!!)

fun  T(tuple: Triple): Triple? =
    if(tuple.first == null || tuple.second == null || tuple.third == null) null
    else Triple(tuple.first!!, tuple.second!!, tuple.third!!)


fun  T(first: A?, second: B?): Pair? =
    if(first == null || second == null) null
    else Pair(first, second)

fun  T(first: A?, second: B?, third: C?): Triple? =
        if(first == null || second == null || third == null) null
        else Triple(first, second, third)

And here's how you should use them:

val a: A? = someValue
val b: B? = someOtherValue
T(a, b)?.let { (a, b) ->
  // Shadowed a and b are of type a: A and b: B
  val c: C? = anotherValue
  T(a, b, c)
}?.let { (a, b, c) ->
  // Shadowed a, b and c are of type a: A, b: B and c: C
  .
  .
  .
}