``` fun tests(start: Int, end: Int): IntArray = (start until end).toList().toIntArray() ```

# functional

[simon.vergauwen]

fun tests(start: Int, end: Int): IntArray =
 (start until end).toList().toIntArray()

[Hexa]

thanks, so I have to convert it to a List first and then Array? Isn't that expensive?

[simon.vergauwen]

Ye, it's how Kotlin collections work unfortunately. In Scala they have a special system with implicit classes which makes it more flexible.

[simon.vergauwen]

toArray is defined on Collection so only way to do it without writing any custom code is this. If you are worried about performance I would definitely write a custom extension method on IntRange to convert toIntArray directly.

[Hexa]

thanks @simon.vergauwen

[simon.vergauwen]

Anytime :)