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Task/Rep-string/Scala/rep-string.scala

@@ -0,0 +1,27 @@
+object RepString extends App {
+  def repsOf(s: String) = s.trim match {
+    case s if s.length < 2 => Nil
+    case s => (1 to (s.length/2)).map(s take _)
+        .filter(_ * s.length take s.length equals s)
+  }
+
+  val tests = Array(
+    "1001110011",
+    "1110111011",
+    "0010010010",
+    "1010101010",
+    "1111111111",
+    "0100101101",
+    "0100100",
+    "101",
+    "11",
+    "00",
+    "1"
+  )
+  def printReps(s: String) = repsOf(s) match {
+    case Nil => s+": NO"
+    case r => s+": YES ("+r.mkString(", ")+")"
+  }
+  val todo = if (args.length > 0) args else tests
+  todo.map(printReps).foreach(println)
+}