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Family Day update

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Ingy döt Net 2020-02-17 23:21:07 -08:00
parent aac6731f2c
commit 9ad63ea473
2442 changed files with 39761 additions and 8255 deletions
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6
Task/XML-XPath/00DESCRIPTION
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@ -1,7 +1,7 @@
Perform the following three XPath queries on the XML Document below:
* Retrieve the first "item" element
* Perform an action on each "price" element (print it out)
* Get an array of all the "name" elements
* '''//item[1]''': Retrieve the first "item" element
* '''//price/text()''': Perform an action on each "price" element (print it out)
* '''//name''': Get an array of all the "name" elements
XML Document:
<inventory title="OmniCorp Store #45x10^3">

42
Task/XML-XPath/Scala/xml-xpath.scala
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@ -26,33 +26,19 @@ scala> val xml: scala.xml.Elem =
| </section>
| </inventory>
scala> val firstItem = for {
| firstSection <- (xml \ "section").headOption
| firstItem <- (firstSection \ "item").headOption
| } yield firstItem
firstItem: Option[scala.xml.Node] =
Some(<item upc="123456789" stock="12">
<name>Invisibility Cream</name>
<price>14.50</price>
<description>Makes you invisible</description>
</item>)
scala> val firstItem = xml \\ "item" take 1
firstItem: scala.xml.NodeSeq =
NodeSeq(<item upc="123456789" stock="12">
<name>Invisibility Cream</name>
<price>14.50</price>
<description>Makes you invisible</description>
</item>)
scala> val prices = for {
| section <- (xml \ "section")
| item <- (section \ "item")
| price <- (item \ "price")
| } yield scala.math.BigDecimal(price.text)
prices: List[scala.math.BigDecimal] = List(14.50, 23.99, 4.95, 3.56)
scala> xml \\ "price" map (_.text) foreach println
14.50
23.99
4.95
3.56
scala> val salesTax = prices.sum * 0.05
salesTax: scala.math.BigDecimal = 2.3500
scala> println(salesTax.setScale(2, BigDecimal.RoundingMode.HALF_UP))
2.35
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)
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>)