Package com.jnape.palatable.lambda.semigroup.builtin

Class MinBy<A,B extends Comparable<B>>

java.lang.Object

com.jnape.palatable.lambda.semigroup.builtin.MinBy<A,B>

Type Parameters:

A - the value type

B - the mapped comparison type

All Implemented Interfaces:

Fn1<Fn1<? super A,? extends B>,Fn1<A,Fn1<A,A>>>, Fn2<Fn1<? super A,? extends B>,A,Fn1<A,A>>, Fn3<Fn1<? super A,? extends B>,A,A,A>, SemigroupFactory<Fn1<? super A,? extends B>,A>, Applicative<Fn1<A,Fn1<A,A>>,Fn1<Fn1<? super A,? extends B>,?>>, Cartesian<Fn1<? super A,? extends B>,Fn1<A,Fn1<A,A>>,Fn1<?,?>>, Cocartesian<Fn1<? super A,? extends B>,Fn1<A,Fn1<A,A>>,Fn1<?,?>>, Contravariant<Fn1<? super A,? extends B>,Profunctor<?,Fn1<A,Fn1<A,A>>,Fn1<?,?>>>, Functor<Fn1<A,Fn1<A,A>>,Fn1<Fn1<? super A,? extends B>,?>>, Profunctor<Fn1<? super A,? extends B>,Fn1<A,Fn1<A,A>>,Fn1<?,?>>, Monad<Fn1<A,Fn1<A,A>>,Fn1<Fn1<? super A,? extends B>,?>>, MonadReader<Fn1<? super A,? extends B>,Fn1<A,Fn1<A,A>>,Fn1<Fn1<? super A,? extends B>,?>>, MonadRec<Fn1<A,Fn1<A,A>>,Fn1<Fn1<? super A,? extends B>,?>>, MonadWriter<Fn1<? super A,? extends B>,Fn1<A,Fn1<A,A>>,Fn1<Fn1<? super A,? extends B>,?>>

public final class MinBy<A,B extends Comparable<B>>
extends Object
implements SemigroupFactory<Fn1<? super A,? extends B>,A>

Given a mapping function from some type A to some Comparable type B, produce a Semigroup over A that chooses between two values x and y via the following rules:

• If x is strictly greater than y in terms of B, return y
• Otherwise, return x

See Also:

• Min
• MaxBy

Field Summary

Fields

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

Constructor Summary

Constructors

Modifier	Constructor	Description
private	MinBy()

Method Summary

Modifier and Type	Method	Description
Semigroup<A>	checkedApply(Fn1<? super A,? extends B> compareFn)	Invoke this function with the given argument, potentially throwing any Throwable.
static <A, B extends Comparable<B>> MinBy<A,B>	minBy()
static <A, B extends Comparable<B>> Semigroup<A>	minBy(Fn1<? super A,? extends B> compareFn)
static <A, B extends Comparable<B>> Fn1<A,A>	minBy(Fn1<? super A,? extends B> compareFn, A x)
static <A, B extends Comparable<B>> A	minBy(Fn1<? super A,? extends B> compareFn, A x, A y)

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

Methods inherited from interface com.jnape.palatable.lambda.functions.Fn2

toBiFunction

Methods inherited from interface com.jnape.palatable.lambda.functions.Fn3

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

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

coerce

Methods inherited from interface com.jnape.palatable.lambda.functions.specialized.SemigroupFactory

apply, checkedApply

Field Details

INSTANCE

private static final MinBy<?,?> INSTANCE

Constructor Details

MinBy

private MinBy()

Method Details

checkedApply

public Semigroup<A> checkedApply(Fn1<? super A,? extends B> compareFn)

Description copied from interface: Fn2

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

Specified by:

checkedApply in interface Fn1<A,B extends Comparable<B>>

Specified by:

checkedApply in interface Fn2<Fn1<? super A,? extends B extends Comparable<B>>,A,Fn1<A,A>>

Specified by:

checkedApply in interface SemigroupFactory<A,B extends Comparable<B>>

Parameters:

compareFn - the argument

Returns:

the result of the function application

minBy

public static <A,
B extends Comparable<B>>
MinBy<A,B> minBy()

minBy

public static <A,
B extends Comparable<B>>
Semigroup<A> minBy(Fn1<? super A,? extends B> compareFn)

minBy

public static <A,
B extends Comparable<B>> Fn1<A,A> minBy(Fn1<? super A,? extends B> compareFn,
 A x)

minBy

public static <A,
B extends Comparable<B>> A minBy(Fn1<? super A,? extends B> compareFn,
 A x,
 A y)