Class Uncons<A>

java.lang.Object

com.jnape.palatable.lambda.functions.builtin.fn1.Uncons<A>

Type Parameters:

A - the Iterable element type

All Implemented Interfaces:

Fn1<Iterable<A>, Maybe<Tuple2<A, Iterable<A>>>>, Applicative<Maybe<Tuple2<A, Iterable<A>>>, Fn1<Iterable<A>, ?>>, Cartesian<Iterable<A>, Maybe<Tuple2<A, Iterable<A>>>, Fn1<?,?>>, Cocartesian<Iterable<A>, Maybe<Tuple2<A, Iterable<A>>>, Fn1<?,?>>, Contravariant<Iterable<A>, Profunctor<?, Maybe<Tuple2<A, Iterable<A>>>, Fn1<?,?>>>, Functor<Maybe<Tuple2<A, Iterable<A>>>, Fn1<Iterable<A>, ?>>, Profunctor<Iterable<A>, Maybe<Tuple2<A, Iterable<A>>>, Fn1<?,?>>, Monad<Maybe<Tuple2<A, Iterable<A>>>, Fn1<Iterable<A>, ?>>, MonadReader<Iterable<A>, Maybe<Tuple2<A, Iterable<A>>>, Fn1<Iterable<A>, ?>>, MonadRec<Maybe<Tuple2<A, Iterable<A>>>, Fn1<Iterable<A>, ?>>, MonadWriter<Iterable<A>, Maybe<Tuple2<A, Iterable<A>>>, Fn1<Iterable<A>, ?>>

public final class Uncons<A>
extends Object
implements Fn1<Iterable<A>, Maybe<Tuple2<A, Iterable<A>>>>

Destructure an Iterable into a Tuple2 of its head and tail, wrapped in an Maybe. If the Iterable is empty, returns Maybe.nothing().

Field Summary

Fields

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

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Uncons()

Method Summary

Modifier and Type	Method	Description
Maybe<Tuple2<A, Iterable<A>>>	checkedApply(Iterable<A> as)	Invoke this function with the given argument, potentially throwing any Throwable.
static <A> Uncons<A>	uncons()
static <A> Maybe<Tuple2<A, Iterable<A>>>	uncons(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, 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 Functor

coerce

Field Details

INSTANCE

private static final Uncons<?> INSTANCE

Constructor Details

Uncons

private Uncons()

Method Details

checkedApply

public Maybe<Tuple2<A, Iterable<A>>> checkedApply(Iterable<A> as)

Description copied from interface: Fn1

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

Specified by:

checkedApply in interface Fn1<Iterable<A>, Maybe<Tuple2<A, Iterable<A>>>>

Parameters:

as - the argument

Returns:

the result of the function application

uncons

public static <A> Uncons<A> uncons()

uncons

public static <A> Maybe<Tuple2<A, Iterable<A>>> uncons(Iterable<A> as)