Hi all, I need to initialize a `ByteArray` with he...

# announcements

[uli]

Hi all,
I need to initialize a ByteArray with hex literals. Here is my Approach:

val key = intArrayOf(0x80, 0xFF, 0x00, 0x7f).map { it.toByte() }.toByteArray()

And the result is (and should be):

-128,-1,0,127

Is there a more compact/idiomatic way to do that?

[uli]

Really to bad that this does not work:

ubyteArrayOf(0x80, 0xFF, 0x00, 0x7f).toByteArray()

and neither

ubyteArrayOf(0x80u, 0xFFu, 0x00u, 0x7fu).toByteArray()

[gildor]

I think it would be more efficient to use: toByte on every item

[gildor]

but yeah, byte constants is pain, don’t think that there is perfect solution

[gildor]

personaly I would use:

byteArrayOf(0x80.toByte(), 0xFF.toByte(), 0x00, 0x7f)

[uli]

Well @gildor, this was just an example. It gets really ugly when you have a long byte string. So I prefer readability over efficiency here. To me the whole topic is more about style then hard facts :-)

[ephemient]

ubyteArrayOf(0x80u, 0xFFu, 0x00u, 0x7Fu)

[ephemient]

can call .toByteArray() on that if you need, although it makes a copy

[ephemient]

@uli works for me, not sure what you mean by "neither"?

[uli]

i fell into the pit again, I think.
IntelliJ EAP does not have a kotlin 1.5.x plugin yet and I was trying in the REPL. So it complained:

ubyteArrayOf(0x80u, 0xFFu, 0x00u, 0x7fu).toByteArray()
error: type of the constant expression cannot be resolved. Please make sure you have the required dependencies for unsigned types in the classpath

[uli]

Fell into the same pit yesterday. I should know by now :-)

[CLOVIS]

Intellij stable does handle UInt & Co correctly. Not sure why EAP is behind

[uli]

there is no compatible kotlin 1.5.10 plugin for EAP yet. 1.4.32 is the latest compatible