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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?
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To get the element from a List in Kotlin present at specific index, call get() function on this list and pass the index as argument to get() function. The Kotlin List. get() function returns the element at the specified index in this list.
Inside main() , create a variable called numbers of type List<Int> because this will contain a read-only list of integers. Create a new List using the Kotlin standard library function listOf() , and pass in the elements of the list as arguments separated by commas.
Extension functions are a cool Kotlin feature that help you develop Android apps. They provide the ability to add new functionality to classes without having to inherit from them or to use design patterns like Decorator.
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 If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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