Unit Tests - list.t

- Added listIntersect and a Boolean listDiff implementation in main.h.
- Added a set of unit tests for the above.

src/main.h

@@ -124,6 +124,19 @@ std::string colorizeDebug (const std::string&);
 int handleImport (std::string&);
 
 // list template
+///////////////////////////////////////////////////////////////////////////////
+template <class T> bool listDiff (const T& left, const T& right)
+{
+  if (left.size () != right.size ())
+    return true;
+
+  for (unsigned int i = 0; i < left.size (); ++i)
+    if (left[i] != right[i])
+      return true;
+
+  return false;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 template <class T> void listDiff (
   const T& left, const T& right, T& leftOnly, T& rightOnly)
@@ -164,5 +177,23 @@ template <class T> void listDiff (
   }
 }
 
+////////////////////////////////////////////////////////////////////////////////
+template <class T> void listIntersect (const T& left, const T& right, T& join)
+{
+  join.clear ();
+
+  for (unsigned int l = 0; l < left.size (); ++l)
+  {
+    for (unsigned int r = 0; r < right.size (); ++r)
+    {
+      if (left[l] == right[r])
+      {
+        join.push_back (left[l]);
+        break;
+      }
+    }
+  }
+}
+
 #endif
 ////////////////////////////////////////////////////////////////////////////////