BinaryOperator | API reference | Android Developers

@FunctionalInterface interface BinaryOperator<T : Any!> : BiFunction<T, T, T>

Represents an operation upon two operands of the same type, producing a result of the same type as the operands. This is a specialization of BiFunction for the case where the operands and the result are all of the same type.

This is a functional interface whose functional method is apply(Object,Object).

Summary

Public methods
open static BinaryOperator<T>!	`maxBy(comparator: Comparator<in T>!)` Returns a `BinaryOperator` which returns the greater of two elements according to the specified `Comparator`.
open static BinaryOperator<T>!	`minBy(comparator: Comparator<in T>!)` Returns a `BinaryOperator` which returns the lesser of two elements according to the specified `Comparator`.

Inherited functions

From class BiFunction

`BiFunction<T, U, V>!`	`andThen(after: Function<in R, out V>!)` Returns a composed function that first applies this function to its input, and then applies the `after` function to the result. If evaluation of either function throws an exception, it is relayed to the caller of the composed function.
`R`	`apply(t: T, u: U)` Applies this function to the given arguments.

Public methods

maxBy

open static fun <T : Any!> maxBy(comparator: Comparator<in T>!): BinaryOperator<T>!

Returns a BinaryOperator which returns the greater of two elements according to the specified Comparator.

Parameters
`<T>`	the type of the input arguments of the comparator
`comparator`	Comparator<in T>!: a `Comparator` for comparing the two values

Return
`BinaryOperator<T>!`	a `BinaryOperator` which returns the greater of its operands, according to the supplied `Comparator`

Exceptions
`java.lang.NullPointerException`	if the argument is null

minBy

open static fun <T : Any!> minBy(comparator: Comparator<in T>!): BinaryOperator<T>!

Returns a BinaryOperator which returns the lesser of two elements according to the specified Comparator.

Parameters
`<T>`	the type of the input arguments of the comparator
`comparator`	Comparator<in T>!: a `Comparator` for comparing the two values

Return
`BinaryOperator<T>!`	a `BinaryOperator` which returns the lesser of its operands, according to the supplied `Comparator`

Exceptions
`java.lang.NullPointerException`	if the argument is null

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