gistfile1.scala

Class Rectangle

val rectWrites = (
  (__ \ 'width).write[Long] and
  (__ \ 'height).write[Long] and
  (__ \ 'x).write[Long] and
  (__ \ 'y).write[Long]
)( (r: Rectangle) => (r.width, r.height, r.x, r.y)  )

aha we can rewrite all awt* writers!

  implicit object ColorWrites extends Writes[Color] {
    def writes(c: Color) = JsString(
      "#"+
      Integer.toHexString(c.getRed())+
      Integer.toHexString(c.getGreen())+
      Integer.toHexString(c.getBlue())
    )
  }

aha we can rewrite all awt* writers!

  implicit val ColorWrites = Writes[Color] { c => 
    JsString(
      "#"+
      Integer.toHexString(c.getRed())+
      Integer.toHexString(c.getGreen())+
      Integer.toHexString(c.getBlue())
    )
  }

  implicit val ColorWrites = Writes[Color] { c =>
    JsString("#%02x%02x%02x" format (c.getRed, c.getGreen, c.getBlue))
  }