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ScalaでTimeの0埋め方法

Last updated at Posted at 2014-04-22

仕事でこんなコードを書いたので、Scalaっぽいかもと思ってメモ

ある時間を表す文字列"HH:mm"というのが場合によっては"H:mm"となる場合があるので format を使って0埋めします。

  /**
   * HH:mm形式で返す(0:00の場合は前0を付ける)
   * @param time
   * @return
   */
  private def formatTime(time:String):String = {
    time.split(':').map{
      t => "%02d".format(t.toInt)
    }.mkString(":")
  }

':'でsplitして配列にして、format関数で前0つけた文字列を返して':'で繋ぐ。もっと簡単に書けるかもしれないけど今の自分ではちょっとはScalaっぽく書けたつもり。もっとScala勉強しよう。

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