net.kemitix.list

Interface HeadTail

public interface HeadTail

Provides a simple implementation of head() and tail() for Lists.

Method Summary

Modifier and Type	Method and Description
static <X> Optional<X>	head(List<X> list) Returns the first item in the list as an Optional.
static <X> List<X>	tail(List<X> list) Returns the list, minus the first item.

Method Detail

head

static <X> Optional<X> head(List<X> list)

Returns the first item in the list as an Optional.

Type Parameters:

X - the type of the lists contents

Parameters:

list - the list

Returns:

an Optional containing the first item in the list, or empty if the list is empty.

tail

static <X> List<X> tail(List<X> list)

Returns the list, minus the first item.

Type Parameters:

X - the type of the lists contents

Parameters:

list - the list

Returns:

a view of the list starting with the second item, or an empty list if the original list has less than two items.