ExamplePartition.kt

fun main() {

    val lines = Try {
        File("./my-pets.csv").readLines().map { it.split(',') }
    }

    val pets : Try<ResultSet<Pet>> = lines.map {
        it.map(::toPet).asResultSet().map { pet -> pet.copy(name = pet.name.toUpperCase()) }
    }
    
    when (pets) {
        is Success -> println(pets.value)
        is Failure -> println(pets.error)
    }
}