閏年のおまけのやっつけくりかえし scala> :paste // Entering paste mode (ctrl-D to finish) val date = new LocalDate(2019,12,31) val date_1 = date.minusMonths(12) val minus = (date: LocalDate) => { date.minusMonths(1) } val retry: (LocalDate …

scala> :paste // Entering paste mode (ctrl-D to finish) val date = new LocalDate val date_1 = date.minusYears(1).plusDays(2) val date_2 = date.plusDays(2).minusYears(1) // Exiting paste mode, now interpreting. date: org.joda.time.LocalDate…

これなー。。。うん @Singleton class Hoge () { ... lazy val currentDate = DateTime.now }

github.com

import import scalaz.syntax.std.string._ val i: Option[String] = "12345".parseInt.toOption final class StringOps(val self: String) extends AnyVal { ... def parseInt: Validation[NumberFormatException, Int] = s.parseInt(self)