179日目

日記

親知らずが成長してきて肉を噛むようになって痛い

今日書いたコード

class Order(val orderNumber: Int) {
   private val itemList = mutableListOf<Item>()

    fun addItem(newItem: Item): Order {
        return addAll(listOf(newItem))
    }

    fun addAll(newItems: List<Item>): Order {
        itemList.addAll(newItems)
        return this
    }

    fun print() {
        println("Order #${orderNumber}")
        var total = 0
        for (item in itemList) {
            println("${item}: $${item.price}")
            total += item.price
        }
        println("Total: $${total}")
    }
}

open class Item(val name: String, val price: Int)

class Noodles : Item("Noodles", 10) {
    override fun toString(): String {
        return name
    }
}

class Vegetables(vararg val toppings: String) : Item("Vegetables", 5) {
    override fun toString(): String {
        if (toppings.isEmpty()) {
            return "$name Chef's Choice"
        }
        
        return name + " " + toppings.joinToString()
    }
}

fun main() {
    val ordersList = mutableListOf<Order>()
    
    val order1 = Order(1)
    order1.addItem(Noodles())
    ordersList.add(order1)

    val order2 = Order(2)
    order2.addItem(Noodles())
    order2.addItem(Vegetables())
    ordersList.add(order2)

    val order3 = Order(3)
    val items = listOf(Noodles(), Vegetables("Carrots", "Beans", "Celery"))
    order3.addAll(items)
    ordersList.add(order3)
    
    val order4 = Order(4).addItem(Noodles()).addItem(Vegetables("Cabbage", "Onion"))
    ordersList.add(order4)
    
    ordersList.add(
        Order(5)
            .addItem(Noodles())
            .addItem(Noodles())
            .addItem(Vegetables("Spinach"))
    )
    
    for (order in ordersList) {
        order.print()
        println()
    }
}

Order #1
Noodles: $10
Total: $10

Order #2
Noodles: $10
Vegetables Chef's Choice: $5
Total: $15

Order #3
Noodles: $10
Vegetables Carrots, Beans, Celery: $5
Total: $15

Order #4
Noodles: $10
Vegetables Cabbage, Onion: $5
Total: $15

Order #5
Noodles: $10
Noodles: $10
Vegetables Spinach: $5
Total: $25

感想

なし