Kotlin and idiomatic way to write, 'if not null, else…' based around mutable value

Question

Suppose we have this code:

class QuickExample {

    fun function(argument: SomeOtherClass) {
        if (argument.mutableProperty != null ) {
            doSome         


        

Answer 1

You could also do something like this:

class If(val any: T?, private val i: (T) -> Unit) {
    infix fun Else(e: () -> Unit) {
        if (any == null) e()
        else i(any)
    }
}

You can then use it like this:

If(nullableString) {
   //Use string
} Else {

}