simplify terminal branch case in pivot routine

index.html

@@ -240,29 +240,20 @@ var Pivot =
                 {
                     // collect modifiers effecting leaves
                     let modifiers = [];
-                    let check = N.Step(inLeaf, "ModifyAt", false);
-                    if(check)
-                    {
-                        modifiers = modifiers.concat(check);
-                    }
-                    check = N.Step(inLeaf, "ModifyDown", false);
-                    if(check)
-                    {
-                        modifiers = modifiers.concat(check);
-                    }
+                    let collectModifier = n => modifiers.push(n);
+                    let connectModifiers = n => modifiers.forEach(inModifier => N.Connect(inModifier, n, "ModifyOut", true));
+
+                    N.Walk(collectModifier, inLeaf, "ModifyAt",   false);
+                    N.Walk(collectModifier, inLeaf, "ModifyDown", false);
 
                     if(modifiers.length)
                     {
                         // apply them to the branch
                         inLastBranch.ID.Walk = N.ID.Walk;
-                        modifiers.forEach( inModifier => N.Connect(inModifier, inLastBranch, "ModifyOut") )
+                        connectModifiers(inLastBranch);
 
                         // also walk them up and connect, but with "check unique" enabled
-                        N.Walk( inNode=>
-                        {
-                            modifiers.forEach( inModifier => N.Connect(inModifier, inNode, "ModifyOut", true) )
-                        }
-                        , inLastBranch, "Hierarchy", false);
+                        N.Walk(connectModifiers, inLastBranch, "Hierarchy", false);
                     }
 
                     // lastly connect the leaf to the branch
@@ -275,7 +266,7 @@ var Pivot =
         {
             iterator = child => Pivot.Pivot(inRoot, child, inPivotIndicies, inSumIndicies, depth+1);
         }
-        N.Step(inParent, "Hierarchy").forEach(iterator);
+        N.Walk(iterator, inParent, "Hierarchy");
         return inParent;
     },
     Create(inPivotIndicies, inSumIndicies)
@@ -304,13 +295,13 @@ var Pivot =
             }
         }
 
-        // disconnect terminal branches
-        N.Walk(()=>{}, inRoot, "Hierarchy", inNode=>{
-            N.Disconnect(inNode, null, "Leaf");
+        // disconnect leaves from terminal branches
+        N.Walk(()=>{}, inRoot, "Hierarchy", true, terminal=>{
+            N.Disconnect(terminal, null, "Leaf");
         });
 
         // disconnect from app
-        N.Disconnect(null, inRoot, "Pivot")
+        N.Disconnect(null, inRoot, "Pivot");
     },
     Modify(inNode)
     {