How do I get this to work kotlinlang #announcements

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Title

Luis Munoz

08/08/2019, 3:48 PM

How do I get this to work?

data class with different data type example

Shawn

08/08/2019, 3:51 PM

unfortunately, secondary constructors need to call the primary as part of the constructor signature

I think you can kinda hack what you’re doing like this:

data class Example (
  val myName : String = "ellis"
) {
  constructor(notDefault: Boolean) : this(if (notDefault) "not ellis" else "ellis")
}

but that’s definitely kind of an odd usage, would probably surprise most folks looking at the code

Luis Munoz

08/08/2019, 3:53 PM

Untitled

thanks was thinking the above

Shawn

08/08/2019, 3:54 PM

what’s usually prescribed in this situation is a factory method in the companion object, optionally implementing

operator fun invoke()

to mimic a constructor call

👍 1

Luis Munoz

08/08/2019, 3:54 PM

yours is better for being immutable

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