I'm trying to initialize an IntArray in Kotlin like so:
intArrayOf(1..9)
But I get a TypeError that Int is required, but I'm providing an IntRange. Is there a way to initialize the array with a range, or do I have to explicitly write out each value?
Using built in functions, this is how you could get to an IntArray from an IntRange:
val array: IntArray = (1..9).toList().toIntArray()
This is a bit wasteful, because it first constructs a list where it puts all the elements, and then it constructs an array as well. To do this directly, you could use your own extension, something like...
fun IntRange.toIntArray(): IntArray {
if (last < first)
return IntArray(0)
val result = IntArray(last - first + 1)
var index = 0
for (element in this)
result[index++] = element
return result
}
Which would give you this syntax:
val array: IntArray = (1..9).toIntArray()