hey! is there an elegant way to do this?: I want a...

# announcements

[xii]

hey! is there an elegant way to do this?: I want a data class that takes a value, but if the value is null, have that value be the result of an operation on other two values. Example in thread

[xii]

Data Class Test(
val a: Long,
val b: Long,
val c: Long?){
val c = if (c==null) a + b else c
}

[kursivee]

i think this is a good stackoverflow that covers your question. explains different approaches and the whys https://stackoverflow.com/a/46376746

[xii]

thank you 🙂

[ildar.i [Android]]

data class Test(
    val a: Long,
    val b: Long,
    val c: Long
) {
    constructor(a: Long, b: Long, c: Long? = a + b) : this(a, b, c ?: a + b)
}

You can add a constructor. Note that their declarations must differ
edit: added default argument for c