diff options
author | Adriaan Moors <adriaan.moors@typesafe.com> | 2013-12-09 11:06:22 -0800 |
---|---|---|
committer | Adriaan Moors <adriaan.moors@typesafe.com> | 2013-12-09 17:11:05 -0800 |
commit | e55510607031aaf7b8473453f83c44a26c9b97e0 (patch) | |
tree | 987d4aeeef387ed435acc64ffadfdf78e6f65bce /docs/examples/fors.scala | |
parent | dc6dd58d9da441b591580684f3d2f38d7898e7d4 (diff) | |
download | scala-e55510607031aaf7b8473453f83c44a26c9b97e0.tar.gz scala-e55510607031aaf7b8473453f83c44a26c9b97e0.tar.bz2 scala-e55510607031aaf7b8473453f83c44a26c9b97e0.zip |
Remove docs/examples; they reside at scala/scala-dist
Diffstat (limited to 'docs/examples/fors.scala')
-rw-r--r-- | docs/examples/fors.scala | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/docs/examples/fors.scala b/docs/examples/fors.scala deleted file mode 100644 index b937e53fcd..0000000000 --- a/docs/examples/fors.scala +++ /dev/null @@ -1,112 +0,0 @@ -package examples - -import scala.xml._ - - -object fors { - - val e = Node.NoAttributes - - class Person(_name: String, _age: Int) { - val name = _name - val age = _age - } - - def printOlderThan20(xs: Seq[Person]): Iterator[String] = - printOlderThan20(xs.iterator) - - def printOlderThan20(xs: Iterator[Person]): Iterator[String] = - for (p <- xs if p.age > 20) yield p.name - - val persons = List( - new Person("John", 40), - new Person("Richard", 68) - ) - - def divisors(n: Int): List[Int] = - for (i <- List.range(1, n+1) if n % i == 0) yield i - - def isPrime(n: Int) = divisors(n).length == 2 - - def findNums(n: Int): Iterable[(Int, Int)] = - for (i <- 1 until n; - j <- 1 until (i-1); - if isPrime(i+j)) yield (i, j) - - def sum(xs: List[Double]): Double = - xs.foldLeft(0.0) { (x, y) => x + y } - - def scalProd(xs: List[Double], ys: List[Double]) = - sum(for((x, y) <- xs zip ys) yield x * y) - - type Lst = List[Any] - - val prefix = null - val scope = TopScope - - val books = List( - Elem(prefix, "book", e, scope, - Elem(prefix, "title", e, scope, - Text("Structure and Interpretation of Computer Programs")), - Elem(prefix, "author", e, scope, - Text("Abelson, Harald")), - Elem(prefix, "author", e, scope, - Text("Sussman, Gerald J."))), - Elem(prefix, "book", e, scope, - Elem(prefix, "title", e, scope, - Text("Principles of Compiler Design")), - Elem(prefix, "author", e, scope, - Text("Aho, Alfred")), - Elem(prefix, "author", e, scope, - Text("Ullman, Jeffrey"))), - Elem(prefix, "book", e, scope, - Elem(prefix, "title", e, scope, - Text("Programming in Modula-2")), - Elem(prefix, "author", e, scope, - Text("Wirth, Niklaus"))) - ) - - def findAuthor(books: Lst) = - for (Elem(_, "book", _, _, book @ _*) <- books; - Elem(_, "title", _, _, Text(title)) <- book.toList; - if (title indexOf "Program") >= 0; - Elem(_, "author", _, _, Text(author)) <- List(book)) yield author - - for (Elem(_, "book", _, _, book @ _*) <- books; - Elem(_, "author", _, _, Text(author)) <- book.toList; - if author startsWith "Ullman"; - Elem(_, "title", _, _, Text(title)) <- List(book)) yield title - - removeDuplicates( - for (Elem(_, "book", _, _, b1 @ _* ) <- books; - Elem(_, "book", _, _, b2 @ _*) <- books; - if b1 != b2; - Elem(_, "author", _, _, Text(a1)) <- b1.toList; - Elem(_, "author", _, _, Text(a2)) <- b2.toList; - if a1 == a2) yield Pair(a1, a2)) - - def removeDuplicates[a](xs: List[a]): List[a] = - if (xs.isEmpty) - xs - else - xs.head :: removeDuplicates(for (x <- xs.tail if x != xs.head) yield x) - - def main(args: Array[String]) { - print("Persons over 20:") - printOlderThan20(persons) foreach { x => print(" " + x) } - println - - println("divisors(34) = " + divisors(34)) - - print("findNums(15) ="); - findNums(15) foreach { x => print(" " + x); } - println - - val xs = List(3.5, 5.0, 4.5) - println("average(" + xs + ") = " + sum(xs) / xs.length) - - val ys = List(2.0, 1.0, 3.0) - println("scalProd(" + xs + ", " + ys +") = " + scalProd(xs, ys)) - } - -} |