Package com.jnape.palatable.lambda.functions.builtin.fn1

Class Coalesce<L,R>

java.lang.Object

com.jnape.palatable.lambda.functions.builtin.fn1.Coalesce<L,R>

Type Parameters:

L - the left parameter type

R - the right parameter type

All Implemented Interfaces:

Fn1<Iterable<Either<L,R>>,Either<Iterable<L>,Iterable<R>>>, Applicative<Either<Iterable<L>,Iterable<R>>,Fn1<Iterable<Either<L,R>>,?>>, Cartesian<Iterable<Either<L,R>>,Either<Iterable<L>,Iterable<R>>,Fn1<?,?>>, Cocartesian<Iterable<Either<L,R>>,Either<Iterable<L>,Iterable<R>>,Fn1<?,?>>, Contravariant<Iterable<Either<L,R>>,Profunctor<?,Either<Iterable<L>,Iterable<R>>,Fn1<?,?>>>, Functor<Either<Iterable<L>,Iterable<R>>,Fn1<Iterable<Either<L,R>>,?>>, Profunctor<Iterable<Either<L,R>>,Either<Iterable<L>,Iterable<R>>,Fn1<?,?>>, Monad<Either<Iterable<L>,Iterable<R>>,Fn1<Iterable<Either<L,R>>,?>>, MonadReader<Iterable<Either<L,R>>,Either<Iterable<L>,Iterable<R>>,Fn1<Iterable<Either<L,R>>,?>>, MonadRec<Either<Iterable<L>,Iterable<R>>,Fn1<Iterable<Either<L,R>>,?>>, MonadWriter<Iterable<Either<L,R>>,Either<Iterable<L>,Iterable<R>>,Fn1<Iterable<Either<L,R>>,?>>

public final class Coalesce<L,R>
extends Object
implements Fn1<Iterable<Either<L,R>>,Either<Iterable<L>,Iterable<R>>>

Fold an Iterable<Either<L, R>> into an Either<Iterable<L>, Iterable<R>>, preserving all results of the side that's returned. That is, if the result is a left, it will contain all left values; if it is a right, it will contain all right values.

It may be useful to think of this as a more efficient version of Merge<Iterable<L>, Iterable<R>>.

Field Summary

Fields

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

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Coalesce()

Method Summary

Modifier and Type	Method	Description
Either<Iterable<L>,Iterable<R>>	checkedApply(Iterable<Either<L,R>> eithers)	Invoke this function with the given argument, potentially throwing any Throwable.
static <A, B> Coalesce<A,B>	coalesce()
static <A, B> Either<Iterable<A>,Iterable<B>>	coalesce(Iterable<Either<A,B>> eithers)

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.jnape.palatable.lambda.functions.Fn1

andThen, apply, carry, cartesian, censor, choose, cocartesian, compose, contraMap, diMap, diMapL, diMapR, discardL, discardR, flatMap, fmap, lazyZip, listens, local, pure, self, thunk, toFunction, trampolineM, widen, zip, zip

Methods inherited from interface com.jnape.palatable.lambda.functor.Functor

coerce

Field Details

INSTANCE

private static final Coalesce<?,?> INSTANCE

Constructor Details

Coalesce

private Coalesce()

Method Details

checkedApply

public Either<Iterable<L>,Iterable<R>> checkedApply(Iterable<Either<L,R>> eithers)

Description copied from interface: Fn1

Invoke this function with the given argument, potentially throwing any Throwable.

Specified by:

checkedApply in interface Fn1<L,R>

Parameters:

eithers - the argument

Returns:

the result of the function application

coalesce

public static <A,
B> Coalesce<A,B> coalesce()

coalesce

public static <A,
B>
Either<Iterable<A>,Iterable<B>> coalesce(Iterable<Either<A,B>> eithers)