unfinished work on random map gen

src/position.cc

@@ -64,3 +64,17 @@ std::vector<position> remove_from_list(const std::vector<position>
 
         return result;
 }
+
+std::vector<position> remove_from_list(const std::vector<position>
+                                       &sorted_positions,
+                                       position &excluded) {
+
+        std::vector<position> result{sorted_positions.size() - 1};
+
+        for (auto src : sorted_positions) {
+                if (src != excluded)
+                        result.push_back(src);
+        }
+
+        return result;
+}