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

map

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

Transform the F wrapped value A into B preserving the F structure Kind<F, A> -> Kind<F, B>

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

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