--- a/README	Fri Dec 16 13:34:33 2016 +0000
+++ b/README	Sun Dec 18 02:01:18 2016 +0000
@@ -6,4 +6,14 @@
 
 deleting comments from scala files
 
-find . -name '*.scala' -print0 | xargs -0 perl -n -p -0 -i.bak -e 's%/\*([^*].*?)?\*/%%gs;s%^([^\"\n\r]*(\"[^\"\n\r]*\"[^\"\n\r]*?)*?)//([^*\n\r].*)?$%$1%gm'
\ No newline at end of file
+find . -name '*.scala' -print0 | xargs -0 perl -n -p -0 -i.bak -e 's%/\*([^*].*?)?\*/%%gs;s%^([^\"\n\r]*(\"[^\"\n\r]*\"[^\"\n\r]*?)*?)//([^*\n\r].*)?$%$1%gm'
+
+
+find . -name '*.scala' -print0 | sed -i.2 's|def ordered_moves(dim: Int, path: Path, x: Pos): List[Pos] = ..|//def ordered_moves(dim: Int, path: Path, x: Pos): List[Pos] = ..|g'
+
+
+LC_ALL=C sed -i.2 -- 's|def ordered_moves(dim: Int, path: Path, x: Pos): List\[Pos\] = \.\.|//def ordered_moves(dim: Int, path: Path, x: Pos): List[Pos] = ..|g' k*/knight3.scala.bak
+
+LC_ALL=C sed -i.2 -- 's|def first_closed_tour_heuristic(dim: Int, path: Path): Option\[Path\] = \.\.\.|//def first_closed_tour_heuristic(dim: Int, path: Path): Option[Path] = ...|g' k*/knight3.scala.bak
+
+LC_ALL=C sed -i.2 -- 's|def first_tour_heuristic(dim: Int, path: Path): Option\[Path\] = \.\.\.|//def first_tour_heuristic(dim: Int, path: Path): Option[Path] = ...|g' k*/knight3.scala.bak
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/marking/knight3c_test.scala	Sun Dec 18 02:01:18 2016 +0000
@@ -0,0 +1,45 @@
+
+import scala.concurrent._
+import scala.concurrent.duration._
+import ExecutionContext.Implicits.global
+import scala.language.postfixOps 
+
+
+def add_pair_urban(x: Pos)(y: Pos): Pos = 
+  (x._1 + y._1, x._2 + y._2)
+
+def is_legal_urban(dim: Int, path: Path)(x: Pos): Boolean = 
+  0 <= x._1 && 0 <= x._2 && x._1 < dim && x._2 < dim && !path.contains(x)
+
+def moves_urban(x: Pos): List[Pos] = 
+  List(( 1,  2),( 2,  1),( 2, -1),( 1, -2),
+       (-1, -2),(-2, -1),(-2,  1),(-1,  2)).map(add_pair_urban(x))
+
+def legal_moves_urban(dim: Int, path: Path, x: Pos): List[Pos] = 
+  moves_urban(x).filter(is_legal_urban(dim, path))
+
+def correct_urban(dim: Int)(p: Path): Boolean = p match {
+  case Nil => true
+  case x::Nil => true
+  case x::y::p => 
+    if (legal_moves_urban(dim, p, y).contains(x)) correct_urban(dim)(y::p) else false
+}
+
+
+lazy val f1 = Future {
+
+  val ts8 = first_tour_heuristic(8, List((0,0))).get
+  assert(correct_urban(8)(ts8) == true)
+
+}
+
+Await.result(f1, 360 second)
+
+lazy val f2 = Future {
+
+  val ts50 = first_tour_heuristic(50, List((0,0))).get
+  assert(correct_urban(50)(ts50) == true)
+
+}
+
+Await.result(f2, 360 second)

--- a/marking/mark02b	Fri Dec 16 13:34:33 2016 +0000
+++ b/marking/mark02b	Sun Dec 18 02:01:18 2016 +0000
@@ -93,6 +93,19 @@
   fi
 fi
 
+if [ $tsts1 -eq 0 ]
+then
+  echo " first_tour_heuristic(8, List((0,0))) found and ok?" | tee -a $out
+  echo " first_tour_heuristic(50, List((0,0))) found and ok?" | tee -a $out
+  
+  if (scala_assert "knight3.scala.bak" "../../../marking/knight3c_test.scala")
+  then
+    echo "  --> success" | tee -a $out
+    marks=$(( marks + 1 ))
+  else
+    echo "  --> test failed" | tee -a $out
+  fi
+fi
 
 
 ## final marks

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/marking/mark03a	Sun Dec 18 02:01:18 2016 +0000
@@ -0,0 +1,113 @@
+#!/bin/bash
+set -e
+
+out=${1:-output}
+
+echo "" > $out
+
+echo "Below is the feedback and provisional mark for your submission" >> $out
+echo "for CW 7, Part 2.  Please note all marks are provisional until" >> $out
+echo "ratified by the assessment board -- this is not an official" >> $out
+echo "results transcript." >> $out
+echo "" >> $out
+
+function scala_vars {
+   (egrep '\bvar\b|\breturn\b|ListBuffer|mutable' "$1" 2> /dev/null 1> /dev/null)
+}
+
+
+# compilation tests
+
+function scala_compile {
+  (scala "$1" 2> /dev/null 1> /dev/null) 
+}
+
+
+# functional tests
+
+function scala_assert {
+  (scala -i "$1" "$2" -e "" 2> /dev/null 1> /dev/null)
+}
+
+
+# marks for CW2b
+marks=$(( 0 ))
+
+
+# knights3: var, comments test
+#
+echo "knight3.scala does not contain vars, returns etc?" | tee -a $out
+
+if (scala_vars knight3.scala)
+then
+  echo "  --> fail" | tee -a $out
+  tsts0=$(( 1 ))
+else
+  echo "  --> yes" | tee -a $out
+  tsts0=$(( 0 )) 
+fi
+
+
+# compilation test
+if  [ $tsts0 -eq 0 ]
+then    
+  echo "knight3.scala runs?" | tee -a $out
+
+  if (scala_compile knight3.scala.bak)
+  then
+    echo "  --> yes" | tee -a $out
+    tsts1=$(( 0 ))
+  else
+    echo "  --> scala knight3.scala did not run successfully" | tee -a $out
+    tsts1=$(( 1 )) 
+  fi
+else
+  tsts1=$(( 1 ))     
+fi
+
+if [ $tsts1 -eq 0 ]
+then
+  echo " ordered_moves(8, List((3,4), (3,2)), (1, 3)) == List((0,1), (0,5), (2,1), (2,5))" | tee -a $out
+  echo " ordered_moves(8, List((4,0)), (0,0)) == List((2,1), (1,2))" | tee -a $out
+  echo " ordered_moves(8, List((0,4)), (0,0)) == List((1,2), (2,1))" | tee -a $out
+  
+  if (scala_assert "knight3.scala.bak" "../../../marking/knight3a_test.scala")
+  then
+    echo "  --> success" | tee -a $out
+    marks=$(( marks + 1 ))
+  else
+    echo "  --> test failed" | tee -a $out
+  fi
+fi
+
+if [ $tsts1 -eq 0 ]
+then
+  echo " first_closed_tour_heuristic(6, List((3, 3))) found and ok?" | tee -a $out
+  
+  if (scala_assert "knight3.scala.bak" "../../../marking/knight3b_test.scala")
+  then
+    echo "  --> success" | tee -a $out
+    marks=$(( marks + 1 ))
+  else
+    echo "  --> test failed" | tee -a $out
+  fi
+fi
+
+if [ $tsts1 -eq 0 ]
+then
+  echo " first_tour_heuristic(8, List((0,0))) found and ok?" | tee -a $out
+  echo " first_tour_heuristic(50, List((0,0))) found and ok?" | tee -a $out
+  
+  if (scala_assert "knight3.scala.bak" "../../../marking/knight3c_test.scala")
+  then
+    echo "  --> success" | tee -a $out
+    marks=$(( marks + 1 ))
+  else
+    echo "  --> test failed" | tee -a $out
+  fi
+fi
+
+
+## final marks
+echo "Overall mark for CW 7, Part 2" | tee -a $out
+echo "$marks" | tee -a $out