arrow-core / arrow.core.extensions.option.functor / arrow.Kind / mapConst

mapConst

@JvmName("mapConst") fun <A, B> Kind<ForOption, A>.~~mapConst~~(arg1: B): Option<B> Deprecated: @extension kinded projected functions are deprecated

Replaces A inside F with B resulting in a Kind<F, B>

Kind<F, A> -> Kind<F, B>

import arrow.core.extensions.option.applicative.just
import arrow.core.extensions.option.functor.mapConst

fun main(args: Array<String>) {
 val result =
 //sampleStart
 "Hello World".just().mapConst("...")
 //sampleEnd
 println(result)
}