Scalaでベクトル 続き

昨日書いたScalaでベクトル
http://d.hatena.ne.jp/nanjakkun/20110601/1306929496
を可変長に。
　

package vektor.vektor
case class Vektor[T](args: T*)(implicit num: Numeric[T]) {

    import num._

    

    val x = args

    val order = args.size

    

    def checkOrder(that: Vektor[T]): Unit = {

        if (this.order != that.order)

            throw new IllegalArgumentException("operands must have same order")

    }

    

    // 加算

    def + (that: Vektor[T]): Vektor[T] = {

        checkOrder(that)

        

        Vektor((for (i <- 0 to this.order - 1) yield (this.x(i) + that.x(i))).toSeq: _*)

    }

    

    // 減算

    def - (that: Vektor[T]): Vektor[T] = {

        checkOrder(that)
        Vektor((for (i <- 0 to this.order - 1) yield (this.x(i) - that.x(i))).toSeq: _*)

    }

    

    // 乗算

    def * (a: T): Vektor[T] = {

        Vektor((for (i <- 0 to this.order - 1) yield (this.x(i) * a)).toSeq: _*)

    }

        

    // 除算  Doubleのみ

    def / (a: Double): Vektor[Double] = {

        Vektor((for (i <- 0 to this.order - 1) yield (this.x(i).toDouble / a)).toSeq: _*)

    }
    // 内積

    def * (that: Vektor[T]): Vektor[T] = {

        checkOrder(that)

        

        Vektor((for (i <- 0 to this.order - 1) yield (this.x(i) * that.x(i))).toSeq: _*)

    }

    

    // 絶対値

    def abs: Double = Math.sqrt(this.x.map(x => x.toDouble * x.toDouble) sum)

    

    def toInt: Vektor[Int] = Vektor(this.x.map(_.toInt): _*)

    def toLong: Vektor[Long] = Vektor(this.x.map(_.toLong): _*)

    def toFloat: Vektor[Float] = Vektor(this.x.map(_.toFloat): _*)

    def toDouble: Vektor[Double] = Vektor(this.x.map(_.toDouble): _*) 

}