Hi. not sure if this is right place but got a ques...

# getting-started

[Giorgi]

Hi. not sure if this is right place but got a question regarding byte in when. I have this small piece of code

fun byteInWhen() {
    val event: Byte = 1
    
    when (event) {
        1 -> "one",
        2 -> "two",
        else -> "other"
    }
}

The issue is "Incompatible types: Int and Byte". So how do I write the when statement? I could use .toByte() but seems ugly and wrong

[Huib Donkers]

I'd go with when (event.toInt()). Curious if there's a better way..

[rkechols]

I'm no expert, but my understanding is that numerical literals like 1 only auto-cast to Int or larger types, and there's no syntax for direct byte literals (like f for floats or L for longs).
Getting it down to a smaller type like Byte just requires a cast/conversion.

Or like Huib said you can cast/convert the Byte up to an Int

https://kotlinlang.org/docs/numbers.html

[calidion]

if events are limited. would suggest using this way:

enum class EventT {
    ONE,
    TWO,
    OTHER
}

fun main() {
    var e = EventT.ONE
    when(e) {
        EventT.ONE -> println("One")
        else -> println("Other")
    }
}

[Giorgi]

sadly enums will not work here. Im receiving ByteArray from bluetooth device. There is always one Byte in the array

[calidion]

take a look at here:

[calidion]

https://stackoverflow.com/questions/51199020/kotlin-bytes-vs-enums-when-parsing-byte-stream