Class ListUtil

java.lang.Object

com.hypixel.hytale.common.util.ListUtil

public class ListUtil
extends Object

Since:

07/11/2017

Version:

1.0

Constructor Summary

Constructors

Constructor	Description
ListUtil()

Method Summary

Modifier and Type	Method	Description
static <T,V> int	binarySearch(List<? extends T> l, Function<T,V> func, V key, Comparator<? super V> c)	Collections.binarySearch(List, Object)
static <T> boolean	emptyOrAllNull(List<T> list)
static <T> List<List<T>>	partition(List<T> list, int sectionSize)
static <T,U> void	removeIf(List<T> list, BiPredicate<T,U> predicate, U obj)
static <T> void	removeIf(List<T> list, Predicate<T> predicate)
static <T,U,V> void	unstableRemoveIf(List<T> list, U obj1, V obj2, TriPredicate<T,U,V> predicate)	Removes predicate-matching elements from the given list by swapping them with the last element in the list and then popping the last element to trim the list by one.
static <T,U,V,W> void	unstableRemoveIf(List<T> list, U obj1, V obj2, W obj3, QuadPredicate<T,U,V,W> predicate)	Removes predicate-matching elements from the given list by swapping them with the last element in the list and then popping the last element to trim the list by one.

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ListUtil

public ListUtil()

Method Details

partition

@Nonnull
public static <T> List<List<T>> partition(@Nonnull
 List<T> list,
 int sectionSize)

removeIf

public static <T> void removeIf(@Nonnull
 List<T> list,
 @Nonnull
 Predicate<T> predicate)

removeIf

public static <T,U> void removeIf(@Nonnull
 List<T> list,
 @Nonnull
 BiPredicate<T,U> predicate,
 U obj)

unstableRemoveIf

public static <T,U,V> void unstableRemoveIf(@Nonnull
 List<T> list,
 @Nullable
 U obj1,
 @Nullable
 V obj2,
 @Nonnull
 TriPredicate<T,U,V> predicate)

Removes predicate-matching elements from the given list by swapping them with the last element in the list and then popping the last element to trim the list by one. This approach can be much more efficient than standard removal operations as it eliminates the need to shift elements forward in the list each time one is removed from the front or middle. This does, however, result in the ordering of elements becoming unstable so may not be suitable where element order is still important.

Type Parameters:

T - the type of the elements in the list.

U - the type of the first object used for predicate evaluation.

V - the type of the second object used for predicate evaluation.

Parameters:

list - the list from which elements will be removed; must not be null.

obj1 - an optional object passed to the predicate for condition evaluation; may be null.

obj2 - an optional object passed to the predicate for condition evaluation; may be null.

predicate - the condition used to determine whether an element should be removed; must not be null.

unstableRemoveIf

public static <T,U,V,W> void unstableRemoveIf(@Nonnull
 List<T> list,
 @Nullable
 U obj1,
 @Nullable
 V obj2,
 @Nullable
 W obj3,
 @Nonnull
 QuadPredicate<T,U,V,W> predicate)

Removes predicate-matching elements from the given list by swapping them with the last element in the list and then popping the last element to trim the list by one. This approach can be much more efficient than standard removal operations as it eliminates the need to shift elements forward in the list each time one is removed from the front or middle. This does, however, result in the ordering of elements becoming unstable so may not be suitable where element order is still important.

Type Parameters:

T - the type of the elements in the list.

U - the type of the first object used for predicate evaluation.

V - the type of the second object used for predicate evaluation.

W - the type of the third object used for predicate evaluation.

Parameters:

list - the list from which elements will be removed; must not be null.

obj1 - an optional object passed to the predicate for condition evaluation; may be null.

obj2 - an optional object passed to the predicate for condition evaluation; may be null.

obj3 - an optional object passed to the predicate for condition evaluation; may be null.

predicate - the condition used to determine whether an element should be removed; must not be null.

emptyOrAllNull

public static <T> boolean emptyOrAllNull(@Nonnull
 List<T> list)

binarySearch

public static <T,V> int binarySearch(@Nonnull
 List<? extends T> l,
 @Nonnull
 Function<T,V> func,
 V key,
 @Nonnull
 Comparator<? super V> c)

Collections.binarySearch(List, Object)