Initial data commit

Task/Factorial/Scala/factorial-1.scala

@@ -0,0 +1,6 @@
+def factorial(n: Int) = {
+  var res = 1
+  for (i <- 1 to n)
+    res *= i
+  res
+}

Task/Factorial/Scala/factorial-2.scala

@@ -0,0 +1,3 @@
+def factorial(n: Int): Int =
+  if (n < 1) 1
+  else       n * factorial(n - 1)

Task/Factorial/Scala/factorial-3.scala

@@ -0,0 +1,6 @@
+def factorial(n: Int) = {
+  @tailrec def fact(x: Int, acc: Int): Int = {
+    if (x < 2) acc else fact(x - 1, acc * x)
+  }
+  fact(n, 1)
+}

Task/Factorial/Scala/factorial-4.scala

@@ -0,0 +1 @@
+def factorial(n: Int) = (2 to n).product

Task/Factorial/Scala/factorial-5.scala

@@ -0,0 +1,2 @@
+def factorial(n: Int) =
+  (2 to n).foldLeft(1)(_ * _)

Task/Factorial/Scala/factorial-6.scala

@@ -0,0 +1,3 @@
+implicit def IntToFac(i : Int) = new {
+  def ! = (2 to i).foldLeft(BigInt(1))(_ * _)
+}