android - Kotlin run scope function returning different data type

Question

fun getStringFromSampleObject(sampleObj: SampleObj): String = sampleObj.run {
        age = 2
        title = "newTitle"
        isValid = true
    }.toString()

val returnedValue =
            Playground().getStringFromSampleObject(SampleObj(age = 1, title = "title", isValid = false))
        Log.e(TAG, "Play, returned string is$returnedValue")

I try to print the return value from the function getStringFromSampleObject() but the value of returnedValue is kotlin.Unit. I expect the string value instead.

Answer 1

Use apply rather than run. It will return object. For better understanding you can refer to this link for Scope Functions