XML/XPath: Difference between revisions

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@@ Line 2,771: / Line 2,771: @@
      | </inventory>
-scala> val firstItem = for {
+scala> val firstItem = xml \\ "item" take 1
+firstItem: scala.xml.NodeSeq =
-     |   firstSection <- (xml \ "section").headOption
+NodeSeq(<item upc="123456789" stock="12">
-     |   firstItem <- (firstSection \ "item").headOption
+      <name>Invisibility Cream</name>
-     | } yield firstItem
+      <price>14.50</price>
-firstItem: Option[scala.xml.Node] =
+      <description>Makes you invisible</description>
-Some(<item upc="123456789" stock="12">
+    </item>)
-             <name>Invisibility Cream</name>
-             <price>14.50</price>
-             <description>Makes you invisible</description>
-           </item>)
-scala> val prices = for {
+scala> xml \\ "price" foreach println
+<price>14.50</price>
-     |   section <- (xml \ "section")
+<price>23.99</price>
-     |   item <- (section \ "item")
-     |   price <- (item \ "price")
+<price>4.95</price>
+<price>3.56</price>
-     | } yield scala.math.BigDecimal(price.text)
-prices: List[scala.math.BigDecimal] = List(14.50, 23.99, 4.95, 3.56)
-scala> val salesTax = prices.sum * 0.05
+scala> val names = (xml \\ "name").toArray
+names: Array[scala.xml.Node] = Array(<name>Invisibility Cream</name>, <name>Levitation Salve</name>, <name>Blork and Freen Instameal</name>, <name>Grob winglets</name>)
-salesTax: scala.math.BigDecimal = 2.3500
-scala> println(salesTax.setScale(2, BigDecimal.RoundingMode.HALF_UP))
-.35
-scala> val names = for {
-     |   section <- (xml \ "section").toArray
-     |   item <- (section \ "item")
-     |   name <- (item \ "name")
-     | } yield name.text
-names: Array[String] = Array(Invisibility Cream, Levitation Salve, Blork and Freen Instameal, Grob winglets)</lang>
 =={{header|Sidef}}==