151日目

日記

今日書いたコード

https://developer.android.com/codelabs/basic-android-kotlin-training-classes-and-inheritance?continue=https%3A%2F%2Fdeveloper.android.com%2Fcourses%2Fpathways%2Fandroid-basics-kotlin-unit-2-pathway-1%23codelab-https%3A%2F%2Fdeveloper.android.com%2Fcodelabs%2Fbasic-android-kotlin-training-classes-and-inheritance#3

fun main() {
    val squareCabin = SquareCabin(6)

    with(squareCabin) {
        println("\nSquare Cabin\n============")
        println("Capacity: ${capacity}")
        println("Material: ${buildingMaterial}")
        println("Has room? ${hasRoom()}")
    }
}

abstract class Dwelling(private var residents: Int) {
    abstract val buildingMaterial: String
    abstract val capacity: Int
    
    fun hasRoom(): Boolean {
        return residents < capacity
    }
}

class SquareCabin(residents: Int): Dwelling(residents) {
    override val buildingMaterial = "Wood"
    override val capacity = 6
}

感想

継承とかwithとか面白い見た目をしていて面白い．*1

*1:https://ja.wikipedia.org/wiki/トートロジー