From bedac58408e4c6a701dd8065ed7a11277f5358e5 Mon Sep 17 00:00:00 2001
From: Guillermo Ramos
Date: Tue, 8 May 2012 17:41:55 +0200
Subject: [Scala] Día 3

---
 scala/chores.scala    |  8 ++++++++
 scala/factorial.scala |  7 +++++++
 scala/kids.scala      | 31 +++++++++++++++++++++++++++++++
 scala/movies.scala    | 13 +++++++++++++
 scala/sizer.scala     | 45 +++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 104 insertions(+)
 create mode 100644 scala/chores.scala
 create mode 100644 scala/factorial.scala
 create mode 100644 scala/kids.scala
 create mode 100644 scala/movies.scala
 create mode 100644 scala/sizer.scala

diff --git a/scala/chores.scala b/scala/chores.scala
new file mode 100644
index 0000000..0e33b5f
--- /dev/null
+++ b/scala/chores.scala
@@ -0,0 +1,8 @@
+def doChore(chore:String):String = chore match {
+    case "clean dishes" => "scrub, dry"
+    case "cook dinner" => "chop, sizzle"
+    case _ => "whine, complain"
+}
+
+println(doChore("clean dishes"))
+println(doChore("mow lawn"))
diff --git a/scala/factorial.scala b/scala/factorial.scala
new file mode 100644
index 0000000..0cfbc0c
--- /dev/null
+++ b/scala/factorial.scala
@@ -0,0 +1,7 @@
+def factorial(n:Int):Int = n match {
+  case 0 => 1
+  case x if x > 0 => factorial(n-1) * n
+}
+
+println(factorial(3))
+println(factorial(0))
diff --git a/scala/kids.scala b/scala/kids.scala
new file mode 100644
index 0000000..590e742
--- /dev/null
+++ b/scala/kids.scala
@@ -0,0 +1,31 @@
+import scala.actors._
+import scala.actors.Actor._
+
+case object Poke
+case object Feed
+
+class Kid() extends Actor {
+  def act() {
+    loop {
+      react {
+        case Poke => {
+          println("Ow...")
+          println("Quit it...")
+        }
+        case Feed => {
+          println("Gurgle...")
+          println("Burp...")
+        }
+      }
+    }
+  }
+}
+
+val bart = new Kid().start
+val lisa = new Kid().start
+
+println("Ready to poke and feed...")
+bart ! Poke
+lisa ! Poke
+bart ! Feed
+lisa ! Feed
diff --git a/scala/movies.scala b/scala/movies.scala
new file mode 100644
index 0000000..d8b145d
--- /dev/null
+++ b/scala/movies.scala
@@ -0,0 +1,13 @@
+val movies = <movies>
+  <movie>The incredibles</movie>
+  <movie>WALL E</movie>
+  <short>Jack Jack Attack</short>
+  <short>Geri's Game</short>
+</movies>
+
+(movies \ "_").foreach { movie =>
+  movie match {
+    case <movie>{movieName}</movie> => println(movieName)
+    case <short>{shortName}</short> => println(shortName + " (short)")
+  }
+}
diff --git a/scala/sizer.scala b/scala/sizer.scala
new file mode 100644
index 0000000..6f60cc4
--- /dev/null
+++ b/scala/sizer.scala
@@ -0,0 +1,45 @@
+import scala.io._
+import scala.actors._
+import Actor._
+
+object PageLoader {
+  def getPageSize(url:String) = Source.fromURL(url, "ISO-8859-1").mkString.length
+}
+
+val urls = List("http://amazon.com",
+                "http://twitter.com",
+                "http://google.com",
+                "http://cnn.com")
+
+def timeMethod(method: () => Unit) = {
+  val start = System.nanoTime
+  method()
+  val end = System.nanoTime
+  println("Method took " + (end-start)/1000000000.0 + " seconds.")
+}
+
+def getPageSizeSequentially() = {
+  for (url <- urls) {
+    println("Size for " + url + ": " + PageLoader.getPageSize(url))
+  }
+}
+
+def getPageSizeConcurrently() = {
+  val caller = self
+
+  for (url <- urls) {
+    actor { caller ! (url, PageLoader.getPageSize(url)) }
+  }
+
+  for (i <- 1 to urls.size) {
+    receive {
+      case (url, size) =>
+      println("Size for " + url + ": " + size)
+    }
+  }
+}
+
+println("Sequential run:")
+timeMethod { getPageSizeSequentially }
+println("Concurrent run:")
+timeMethod { getPageSizeConcurrently }
-- 
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