Topo_Diff - for_each_X() convenience functions

1 files changed, 16 insertions, 0 deletions

diff --git a/src/model/diff.js b/src/model/diff.js
index 1bcfc5a2..ca9c41c9 100644
--- a/src/model/diff.js
+++ b/src/model/diff.js
@@ -35,6 +35,22 @@ define([],
                 this.node_set_rm = obj_spec.node_set_rm;
                 this.node_set_add = obj_spec.node_set_add;
                 this.link_set_add = obj_spec.link_set_add;
+
+            }
+            Topo_Diff.prototype.for_each_node_add = function(callback, this_arg) {
+                this.node_set_add.forEach(callback, this_arg);
+            }
+
+            Topo_Diff.prototype.for_each_node_rm = function(callback, this_arg) {
+                this.node_set_rm.forEach(callback, this_arg);
+            }
+
+            Topo_Diff.prototype.for_each_link_add = function(callback, this_arg) {
+                this.link_set_add.forEach(callback, this_arg);
+            }
+
+            Topo_Diff.prototype.for_each_link_rm = function(callback, this_arg) {
+                this.link_set_rm.forEach(callback, this_arg);
             }
 
             /**