[NL/DOF] Readability: rename id -> index.

NumLib/DOF/MeshComponentMap.cpp

@@ -359,20 +359,20 @@ void MeshComponentMap::createParallelMeshComponentMap(
         // mesh items are ordered first by node, cell, ....
         for (std::size_t j = 0; j < c.getNumberOfNodes(); j++)
         {
-            GlobalIndexType global_id = static_cast<GlobalIndexType>(
+            GlobalIndexType global_index = static_cast<GlobalIndexType>(
                 components.size() * partitioned_mesh.getGlobalNodeID(j) +
                 comp_id);
             const bool is_ghost = partitioned_mesh.isGhostNode(
                 partitioned_mesh.getNode(j)->getID());
             if (is_ghost)
             {
-                _ghosts_indices.push_back(global_id);
-                global_id = -global_id;
+                _ghosts_indices.push_back(global_index);
+                global_index = -global_index;
                 // If the ghost entry has an index of 0,
                 // its index is set to the negative value of unknowns.
-                if (global_id == 0)
+                if (global_index == 0)
                 {
-                    global_id = -num_unknowns;
+                    global_index = -num_unknowns;
                 }
             }
             else
@@ -381,7 +381,7 @@ void MeshComponentMap::createParallelMeshComponentMap(
             }
 
             _dict.insert(Line(Location(mesh_id, MeshLib::MeshItemType::Node, j),
-                              comp_id, global_id));
+                              comp_id, global_index));
         }
 
         _num_global_dof += partitioned_mesh.getNumberOfGlobalNodes();