Kotlin List tail function

Question

I am trying to find a tail function in List<T> but I couldn't find any. I ended up doing this.

fun <T> List<T>.tail() = this.takeLast(this.size -1) 

Is there a better way to do this?

Answer 1

Kotlin doesn't have a built-in List<T>.tail() function, so implementing your own extension function is the only way. Although your implementation is perfectly fine, it can be simplified a bit:

fun <T> List<T>.tail() = drop(1) 

Or, instead of extension function, you can define an extension property:

val <T> List<T>.tail: List<T>   get() = drop(1)  val <T> List<T>.head: T   get() = first() 

And then use it like:

val list = listOf("1", "2", "3") val head = list.head val tail = list.tail