E

E

fun testing() {
    val x = Result.Ok(5)
    val y = x.map { it * 2 }

    val z: Result<Int,String> = Result.Err("Error")
    val y2 = z.map { it + 4 }
    val y3 = z.mapError { it.length }

    val q: Result<String, Throwable> = x.flatMap { Result.Ok("$it") }
}