Uses of Interface
com.jongsoft.lang.control.Optional

Packages that use Optional

Package	Description
com.jongsoft.lang	This package contains all interfaces used through out the functional library.
com.jongsoft.lang.collection	A purely functional based set of collection implementations based upon the Collection.
com.jongsoft.lang.control	The control package contains flow control interfaces.

Uses of Optional in com.jongsoft.lang

Methods in com.jongsoft.lang that return Optional

Modifier and Type	Method	Description
static <T> Optional<T>	Control.Option()	Will always return an empty optional.
static <T> Optional<T>	Control.Option(T value)	Creates a new Optional representing the provided value.

Uses of Optional in com.jongsoft.lang.collection

Methods in com.jongsoft.lang.collection that return Optional

Modifier and Type	Method	Description
default Optional<java.lang.Double>	Traversable.average()	Calculates the average of this elements, assuming that the element type is Number.
default Optional<T>	Collection.first(java.util.function.Predicate<T> predicate)
default Optional<T>	Iterator.first(java.util.function.Predicate<T> predicate)
Optional<T>	Traversable.first(java.util.function.Predicate<T> predicate)	Find the first match in the elements using the provided Predicate.
default Optional<Tree<T>>	Tree.getChild(java.lang.String label)
default Optional<T>	Collection.last(java.util.function.Predicate<T> predicate)
default Optional<T>	Iterator.last(java.util.function.Predicate<T> predicate)
Optional<T>	Traversable.last(java.util.function.Predicate<T> predicate)	Find the last match in the Iterator using the provided Predicate.
default Optional<java.lang.Double>	Traversable.sum()	Calculates the sum of this elements.

Uses of Optional in com.jongsoft.lang.control

Methods in com.jongsoft.lang.control that return Optional

Modifier and Type	Method	Description
Optional<T>	Optional.filter(java.util.function.Predicate<T> predicate)
<U> Optional<U>	Optional.map(java.util.function.Function<T,U> mapper)