Package com.github.tonivade.purefun.core

Interface Function2<A,B,R>

Type Parameters:

A - type of first function parameter

B - type of second function parameter

R - type of return value

All Superinterfaces:

Recoverable

All Known Subinterfaces:

Operator2<T>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface Function2<A,B,R>
extends Recoverable

This interface represents a function with a two parameters. Similar to BiFunction.

The function can throws checked exceptions, but calling apply() method, the exception is sneaky thrown. So, it can be used as a higher order function in Stream or Optional API.

Method Summary

Modifier and Type	Method	Description
default <C> Function2<A,B,C>	andThen(Function1<? super R,? extends C> after)
default R	apply(A a, B b)
default <C> Function1<C,R>	compose(Function1<? super C,? extends A> beforeT, Function1<? super C,? extends B> beforeV)
static <A, B, R> Function2<A,B,R>	cons(R value)
default Function1<A,Function1<B,R>>	curried()
static <A, B> Function2<A,B,A>	first()
default Function2<A,B,Either<Throwable,R>>	liftEither()
default Function2<A,B,Option<R>>	liftOption()
default Function2<A,B,Try<R>>	liftTry()
default Function2<A,B,R>	memoized()
static <A, B, R> Function2<A,B,R>	of(Function2<? super A,? super B,? extends R> reference)
R	run(A a, B b)
static <A, B> Function2<A,B,B>	second()
default Function1<Tuple2<A,B>,R>	tupled()
static <A, B, R> Function2<A,B,R>	uncurried(Function1<? super A,? extends Function1<? super B,? extends R>> function)

Methods inherited from interface com.github.tonivade.purefun.core.Recoverable

sneakyThrow

Method Details

apply

default R apply(A a,
 B b)

run

R run(A a,
 B b)
throws Throwable

Throws:

Throwable

curried

default Function1<A,Function1<B,R>> curried()

tupled

default Function1<Tuple2<A,B>,R> tupled()

andThen

default <C> Function2<A,B,C> andThen(Function1<? super R,? extends C> after)

compose

default <C> Function1<C,R> compose(Function1<? super C,? extends A> beforeT,
 Function1<? super C,? extends B> beforeV)

liftTry

default Function2<A,B,Try<R>> liftTry()

liftEither

default Function2<A,B,Either<Throwable,R>> liftEither()

liftOption

default Function2<A,B,Option<R>> liftOption()

memoized

default Function2<A,B,R> memoized()

of

static <A,
B,
R> Function2<A,B,R> of(Function2<? super A,? super B,? extends R> reference)

uncurried

static <A,
B,
R> Function2<A,B,R> uncurried(Function1<? super A,? extends Function1<? super B,? extends R>> function)

cons

static <A,
B,
R> Function2<A,B,R> cons(R value)

first

static <A,
B> Function2<A,B,A> first()

second

static <A,
B> Function2<A,B,B> second()