Class Find<A>

java.lang.Object

com.jnape.palatable.lambda.functions.builtin.fn2.Find<A>

Type Parameters:

A - the Iterable element type

All Implemented Interfaces:

Fn1<Fn1<? super A, ? extends Boolean>, Fn1<Iterable<A>, Maybe<A>>>, Fn2<Fn1<? super A, ? extends Boolean>, Iterable<A>, Maybe<A>>, Applicative<Fn1<Iterable<A>, Maybe<A>>, Fn1<Fn1<? super A, ? extends Boolean>, ?>>, Cartesian<Fn1<? super A, ? extends Boolean>, Fn1<Iterable<A>, Maybe<A>>, Fn1<?,?>>, Cocartesian<Fn1<? super A, ? extends Boolean>, Fn1<Iterable<A>, Maybe<A>>, Fn1<?,?>>, Contravariant<Fn1<? super A, ? extends Boolean>, Profunctor<?, Fn1<Iterable<A>, Maybe<A>>, Fn1<?,?>>>, Functor<Fn1<Iterable<A>, Maybe<A>>, Fn1<Fn1<? super A, ? extends Boolean>, ?>>, Profunctor<Fn1<? super A, ? extends Boolean>, Fn1<Iterable<A>, Maybe<A>>, Fn1<?,?>>, Monad<Fn1<Iterable<A>, Maybe<A>>, Fn1<Fn1<? super A, ? extends Boolean>, ?>>, MonadReader<Fn1<? super A, ? extends Boolean>, Fn1<Iterable<A>, Maybe<A>>, Fn1<Fn1<? super A, ? extends Boolean>, ?>>, MonadRec<Fn1<Iterable<A>, Maybe<A>>, Fn1<Fn1<? super A, ? extends Boolean>, ?>>, MonadWriter<Fn1<? super A, ? extends Boolean>, Fn1<Iterable<A>, Maybe<A>>, Fn1<Fn1<? super A, ? extends Boolean>, ?>>

public final class Find<A>
extends Object
implements Fn2<Fn1<? super A, ? extends Boolean>, Iterable<A>, Maybe<A>>

Iterate the elements in an Iterable, applying a predicate to each one, returning the first element that matches the predicate, wrapped in a Maybe. If no elements match the predicate, the result is Maybe.nothing(). This function short-circuits, and so is safe to use on potentially infinite Iterable instances that guarantee to have an eventually matching element.

Field Summary

Fields

Modifier and Type	Field	Description
private static final Find<?>	INSTANCE

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Find()

Method Summary

Modifier and Type	Method	Description
Maybe<A>	checkedApply(Fn1<? super A, ? extends Boolean> predicate, Iterable<A> as)
static <A> Find<A>	find()
static <A> Fn1<Iterable<A>, Maybe<A>>	find(Fn1<? super A, ? extends Boolean> predicate)
static <A> Maybe<A>	find(Fn1<? super A, ? extends Boolean> predicate, Iterable<A> as)

Methods inherited from class Object

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

Methods inherited from interface Fn1

andThen, carry, cartesian, censor, choose, cocartesian, diMap, diMapR, discardL, flatMap, fmap, lazyZip, listens, local, pure, self, thunk, toFunction, trampolineM, zip, zip

Methods inherited from interface Fn2

apply, apply, checkedApply, compose, contraMap, diMapL, discardR, flip, toBiFunction, uncurry, widen

Methods inherited from interface Functor

coerce

Field Details

INSTANCE

private static final Find<?> INSTANCE

Constructor Details

Find

private Find()

Method Details

checkedApply

public Maybe<A> checkedApply(Fn1<? super A, ? extends Boolean> predicate,
 Iterable<A> as)

Specified by:

checkedApply in interface Fn2<Fn1<? super A, ? extends Boolean>, Iterable<A>, Maybe<A>>

find

public static <A> Find<A> find()

find

public static <A> Fn1<Iterable<A>, Maybe<A>> find(Fn1<? super A, ? extends Boolean> predicate)

find

public static <A> Maybe<A> find(Fn1<? super A, ? extends Boolean> predicate,
 Iterable<A> as)