/**
* You can edit, run, and share this code.
* play.kotlinlang.org
*///
data class MyDate(val year: Int, val month: Int, val dayOfMonth: Int) : Comparable<MyDate> {
override fun compareTo(other: MyDate) = when {
year != other.year -> year - other.year
month != other.month -> month - other.month
else -> dayOfMonth - other.dayOfMonth
}
}
class DateRange(val start: MyDate, val endInclusive: MyDate) {
operator fun contains(item: MyDate): Boolean = start <= item && item <= endInclusive
}
fun checkInRange(date: MyDate, first: MyDate, last: MyDate): Boolean {
return date in DateRange(first, last)
}
fun HowToUse_in(){//inを使ってみる
//in と contain を使ってみる
val list = listOf("a","b")
println(list)
println( "a" in list) //aがリストに含まれているか?
println( "a" !in list)
println( list.contains("a"))
println( !list.contains("a"))
}
fun main(args : Array<String>){
HowToUse_in()
//-----checkInRangeを使ってみる
//今日(2019年8月20日)
var today = MyDate(2019,8,31)
//去年の始めと終わり(戌年)
val inu_FirstDay = MyDate(2018,1,1)
val inu_LastDay = MyDate(2018,12,31)
//今年の初めと終わり(亥年)
val inosisi_FirstDay = MyDate(2019,1,1)
val inosisi_LastDay = MyDate(2019,12,31)
println("今日は戌年か? ${checkInRange(date=today,first=inu_FirstDay,last=inu_LastDay)}")
println("今日は亥年か? ${checkInRange(date=today,first=inosisi_FirstDay,last=inosisi_LastDay)}")
//-----checkInRangeを使ってみる
}
