Ruby's Object#tap by Scala

Tap.scala

package x7c1.wheat.splicer.core.logger

object Tap {
  object implicits {
    implicit class Provider[A](val target: A) extends AnyVal {
      def tap(f: (A => Unit)*): A = {
        f foreach (_ (target))
        target
      }
    }
  }
}

tap_usage.scala

import x7c1.wheat.splicer.core.logger.Tap.implicits.Provider

val policy = new TimeBasedRollingPolicy[ILoggingEvent]().tap(
  _ setFileNamePattern """logs/app.%d{yyyy-MM-dd}.log""",
  _ setMaxHistory 7,
  _ setContext context,
  _ setParent new FileAppender[ILoggingEvent]().tap(
    _ setFile "logs/app.log"
  ),
  _ start()
)
new RollingFileAppender[ILoggingEvent]().tap(
  _ setEncoder encoder,
  _ setContext context,
  _ setRollingPolicy policy,
  _ start()
)