Is it possible to create an operator function to overload `[from .. to]` on `ByteArray` to do someth...

# server

[Gavin Ray]

Is it possible to create an operator function to overload [from .. to] on ByteArray to do something like this?

operator fun ByteArray.get(intRange: IntRange): Byte {
    val bytes = this.sliceArray(intRange)
    return ByteBuffer.wrap(bytes).getInt()
}

fun getID(data: ByteArray): Int = data[0..3] as Int

[jessel]

You could get nearly this by specifying the from and to variables as parameters of the get operator

[jessel]

operator fun ByteArray.get(from: Int, to: Int)

[jessel]

data[0, 3]

[CLOVIS]

@Gavin Ray your code looks correct, what's your question?

[Adam S]

yeah, it needs a bit of tidying (I’m not sure what the ByteBuffer is for) but the general idea seems to work

https://pl.kotl.in/4zSqCQ0ap

fun main() {
	val bytes = byteArrayOf(0x1, 0x2, 0x3, 0x4, 0x5)
    println(bytes[1..3].joinToString())
    println(bytes[4..4].joinToString())
    println(bytes[0..4].joinToString())
}

operator fun ByteArray.get(intRange: IntRange) = this.sliceArray(intRange)

2, 3, 4
5
1, 2, 3, 4, 5

[Gavin Ray]

Ahh okay thank you -- I was running into issues because it was returning a Byte type rather than an Int but this is great -- thanks all!