return false

N.js

@@ -0,0 +1,172 @@
+var N =
+{
+    ID:{
+        Walk:0,
+        Instance:0
+    },
+
+    Create(inMeta)
+    {
+        return {
+            ID:{
+                Walk:0,
+                Instance:N.ID.Instance++
+            },
+            Meta:inMeta||{},
+            Link:{}
+        };
+    },
+    Connect(inNodeMajor, inNodeMinor, inKey, inUnique)
+    {
+        if(inUnique) // bail if the nodes are already connected
+        {
+            let check = N.Step(inNodeMajor, inKey, true);
+            if(check)
+            {
+                if(check.indexOf(inNodeMinor) !== -1)
+                {
+                    return;
+                }
+            }
+        }
+        N.Step(inNodeMajor, inKey, true, true).push(inNodeMinor);
+        N.Step(inNodeMinor, inKey, false, true).push(inNodeMajor);
+    },
+    Disconnect(inNodeMajor, inNodeMinor, inKey)
+    {
+        let remove = (inArray, inMatch) => inArray.findIndex( (inMember, inIndex, inArray) => (inMember === inMatch) ? inArray.splice(inIndex, 1) : false );
+
+        // if no specific child was passed
+        if(inNodeMinor === null)
+        {
+            // get all the children
+            let check = N.Step(inNodeMajor, inKey);
+            if(!check){ return; }
+
+            // go down to each child ...
+            check.forEach( inNodeMinor => 
+            {
+                let connections = inNodeMinor.Link[inKey];
+                remove( connections.Get, inNodeMajor); // ... and remove any reference to the parent
+
+                // if after the remove operation, this child has no connections on inKey, scrub the key
+                if(!connections.Set.length && !connections.Get.length)
+                {
+                    delete inNodeMinor.Link[inKey];
+                }
+            });
+
+            // we just wiped out all outgoing connections to the parent, if incoming connections are empty too we can purge the key there as well
+            if(inNodeMajor.Link[inKey].Get.length == 0)
+            {
+                delete inNodeMajor.Link[inKey];
+            }
+            return;
+        }
+
+        // if no specific parent was passed
+        if(inNodeMajor === null)
+        {
+            // get all the parents
+            let check = N.Step(inNodeMinor, inKey, false);
+            if(!check){ return; }
+            
+            // go up to each parent ...
+            check.forEach( inNodeMajor => 
+            {
+                let connections = inNodeMajor.Link[inKey];
+                remove( connections.Set, inNodeMinor); // ... and remove any reference to the child
+                
+                // if after the remove operation, this parent has no connections on inKey, scrub the key
+                if( !connections.Set.length && !connections.Get.length )
+                {
+                    delete inNodeMajor.Link[inKey];
+                }
+            });
+
+            // we just wiped out all incoming connections to the child, if outgoing connections are empty too we can purge the key there as well
+            if(inNodeMinor.Link[inKey].Set.length == 0)
+            {
+                delete inNodeMinor.Link[inKey];
+            }
+            return;
+        }
+
+        // if a specific parent and child were passed
+        if(inNodeMajor.Link[inKey].Set.length == 1)
+        {
+            delete inNodeMajor.Link[inKey];
+        }
+        else
+        {
+            remove(inNodeMajor.Link[inKey].Set, inNodeMinor);
+        }
+        if(inNodeMinor.Link[inKey].Get.length == 1)
+        {
+            delete inNodeMinor.Link[inKey];
+        }
+        else
+        {
+            remove(inNodeMinor.Link[inKey].Get, inNodeMajor);
+        }
+
+    },
+    Step(inNode, inKey, inForward, inForceCreate)
+    {
+        let connectionGroup = inNode.Link[inKey];
+        if(!connectionGroup)
+        {
+            if(inForceCreate === true)
+            {
+                inNode.Link[inKey] = connectionGroup = {Get:[], Set:[]};
+            }
+            else
+            {
+                return false;
+            }
+        }
+        return (inForward === undefined || inForward === true) ? connectionGroup.Set : connectionGroup.Get;
+        
+    },
+    Walk(inIterator, inNode, inKey, inForward, inTerminal)
+    {
+        let array = N.Step(inNode, inKey, inForward);
+
+        if(!array.length && inTerminal)
+        {
+            return inTerminal(inNode);
+        }
+
+        for(let i=0; i<array.length; i++)
+        {
+            let next = array[i];
+            if(next.ID.Walk !== N.ID.Walk)
+            {
+                next.ID.Walk = N.ID.Walk;
+                let results = inIterator(next);
+                if(results !== false)
+                {
+                    N.Walk(inIterator, next, inKey, inForward, inTerminal);
+                }
+                else
+                {
+                    //console.log("routine exited");
+                }
+            }
+            else
+            {
+                //console.log("id collision");
+            }
+        }
+    },
+    Path(inArray, inNode, inKey, inForward)
+    {
+        var current = inNode;
+        var direction = inForward||true;
+        for(let i=0; i<inArray.length; i++)
+        {
+            current = N.Step(current, inKey, direction)[inArray[i]];
+        }
+        return current;
+    }
+};

Pivot.js

@@ -0,0 +1,198 @@
+var Pivot = 
+{
+    Leaves:{},
+    Root:N.Create({Label:"All Pivots"}),
+    Schema:N.Create({Label:"Column Details"}),
+    Proto:N.Create({Label:"User Form"}),
+    Init(inColumnNames, inColumnTypes, inRows)
+    {        
+        for(let i=0; i<inColumnNames.length; i++)
+        {
+            let columnNode = N.Create({Label:inColumnNames[i], Index:i});
+            N.Connect(Pivot.Schema, columnNode, inColumnTypes[i]);
+            N.Connect(Pivot.Schema, columnNode, "all");
+        }
+        Pivot.Leaves = inRows.map(r => N.Create({Row:r}));
+        Pivot.Init = ()=>{};
+    },
+    Create(inPivotIndicies, inSumIndicies)
+    {
+        N.ID.Walk++;
+        
+        let columns = N.Step(Pivot.Schema, "all");
+        let label = inPivotIndicies.map( inPivotIndex =>
+        {
+            return columns[inPivotIndex].Meta.Label;
+        });
+
+        let pivotRoot = N.Create({Label:label.join("|"), Leaves:Pivot.Leaves});
+        N.Connect(Pivot.Root, pivotRoot, "Pivot");
+        return Pivot.Pivot(pivotRoot, pivotRoot, inPivotIndicies, inSumIndicies);
+    },
+    Pivot(inRoot, inParent, inPivotIndicies, inSumIndicies, inDepth)
+    {
+
+
+        let depth = inDepth||0;
+        let uniques = {};
+        let indexPivot = inPivotIndicies[depth];
+        if(!inParent.Meta.Leaves)
+        {
+            console.log("problem")
+        }
+        // create a set of new nodes off of the input node
+        inParent.Meta.Leaves.forEach((inLeaf)=>
+        {
+            let row = inLeaf.Meta.Row; // shorthand for the raw "CSV" row in the leaf Node's Meta
+            let value = row[indexPivot]; // get the pivot column
+            let match = uniques[value]; // check in the uniques list if this pivot column exists
+            if(!match)
+            {
+                // if not, store a value under that key that will be the meta object for a new child
+
+                let clone = row.map(r=>null);
+                inSumIndicies.forEach((inSumIndex, inIndex, inArray)=>
+                {
+                    clone[inSumIndex] = row[inSumIndex]
+                });
+                match = uniques[value] = {
+                    Label:value,
+                    Row:clone, 
+                    IndexPivot:indexPivot,
+                    IndexSum:inSumIndicies,
+                    Leaves:[],
+                    Depth:depth
+                };
+                // grow a child off of the parent using the meta object
+                N.Connect(inParent, N.Create(match), "Hierarchy");
+            }
+            else
+            {
+                // if a match does exist, sum the appropriate columns
+                inSumIndicies.forEach((inSumIndex) => match.Row[inSumIndex] += row[inSumIndex]);
+            }
+            // move the leaves into the child
+            match.Leaves.push(inLeaf);
+        });
+        
+        delete inParent.Meta.Leaves;
+        let iterator = () => {};
+        if(depth >= inPivotIndicies.length-1)
+        {
+            iterator = inLastBranch =>
+            {
+                inLastBranch.Meta.Leaves.forEach( inLeaf =>
+                {
+                    // collect modifiers effecting leaves
+                    let modifiers = [];
+                    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;
+                        connectModifiers(inLastBranch);
+
+                        // also walk them up and connect, but with "check unique" enabled
+                        console.log("walking modifiers up from", inLastBranch.Meta.Label);
+                        N.ID.Walk++;
+                        N.Walk(connectModifiers, inLastBranch, "Hierarchy", false);
+                    }
+
+                    // lastly connect the leaf to the branch
+                    N.Connect(inLastBranch, inLeaf, "Leaf");
+
+                });
+                delete inLastBranch.Meta.Leaves;
+            }
+        }
+        else
+        {
+            iterator = child => {
+                if(child.Meta.Label == "b")
+                {
+                    console.log("at b for some reason");
+                }
+                Pivot.Pivot(inRoot, child, inPivotIndicies, inSumIndicies, depth+1);
+            };
+        }
+
+        N.Walk(iterator, inParent, "Hierarchy");
+        
+        return inParent;
+    },
+    Delete(inRoot)
+    {
+        // disconnect modifiers
+        let check = N.Step(inRoot, "ModifyUp", false);
+        if(check)
+        {
+            while(check.length>0)
+            {
+                Pivot.Unmodify(check[0]);
+            }
+        }
+
+        // disconnect leaves from terminal branches
+        N.Walk(()=>{}, inRoot, "Hierarchy", true, terminal=>{
+            N.Disconnect(terminal, null, "Leaf");
+        });
+
+        // disconnect from app
+        N.Disconnect(null, inRoot, "Pivot");
+    },
+    Modify(inNode)
+    {
+        let modified = N.Create({Label:"Modifier"});
+
+        // traverse
+        let gatherUp   = n => N.Connect(modified, n, "ModifyUp");
+        let gatherDown = n => N.Connect(modified, n, "ModifyDown");
+        let gatherOut  = n => N.Connect(modified, n, "ModifyOut");
+
+        N.ID.Walk++;
+        inNode.ID.Walk = N.ID.Walk;
+        
+        // at
+        N.Connect(modified, inNode, "ModifyAt");
+        
+        // up
+        N.Walk(gatherUp, inNode, "Hierarchy", false);
+
+        // down 1
+        N.Walk(gatherDown, inNode, "Hierarchy", true, terminal=>
+        {
+            // down 2
+            // for each terminal node, step down into its leaves and gather down
+            N.Walk(gatherDown, terminal, "Leaf", true, leaf=>
+            {
+                // out 1
+                // walk back up on the leaf connections on other trees
+                N.Walk(gatherOut, leaf, "Leaf", false, terminal=>
+                {   
+                    // out 2
+                    // and continueup the hierarchy
+                    N.Walk(gatherOut, terminal, "Hierarchy", false);
+                });
+            });
+        });
+
+        return modified;
+    },
+    Unmodify(inModifier)
+    {
+        N.Disconnect(inModifier, null, "ModifyUp");
+        N.Disconnect(inModifier, null, "ModifyDown");
+        N.Disconnect(inModifier, null, "ModifyOut");
+        N.Disconnect(inModifier, null, "ModifyAt");
+        N.Disconnect(null, inModifier, "Modifier");
+    }
+};

index.html

@@ -1,819 +1,61 @@
-<div id="app"></div>
 
-<!-- N -->
+<html>
+    <head>
+        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+        <script src="N.js"></script>
+        <script src="Pivot.js"></script>
+    </head>
+    <body>
+
 <script>
-
-var N =
-{
-    ID:{
-        Walk:0,
-        Instance:0
-    },
-
-    Create(inMeta)
+    let root = N.Create("root");
+    var context = {};
+    let recurse = (node, depth) =>
     {
-        return {
-            ID:{
-                Walk:0,
-                Instance:N.ID.Instance++
-            },
-            Meta:inMeta||{},
-            Link:{}
-        };
-    },
-    Connect(inNodeMajor, inNodeMinor, inKey, inUnique)
-    {
-        if(inUnique) // bail if the nodes are already connected
+        // create a set of new nodes off of the input node
+        let c1 = N.Create(node.Meta+"-c1");
+        let c2 = N.Create(node.Meta+"-c2");
+        N.Connect(node, c1, "parent");
+        N.Connect(node, c2, "parent");
+
+        var iterator;
+        if(depth < 1)
         {
-            let check = N.Step(inNodeMajor, inKey, true);
-            if(check)
-            {
-                if(check.indexOf(inNodeMinor) !== -1)
-                {
-                    return;
-                }
-            }
-        }
-        N.Step(inNodeMajor, inKey, true, true).push(inNodeMinor);
-        N.Step(inNodeMinor, inKey, false, true).push(inNodeMajor);
-    },
-    Disconnect(inNodeMajor, inNodeMinor, inKey)
-    {
-        let remove = (inArray, inMatch) => inArray.findIndex( (inMember, inIndex, inArray) => (inMember === inMatch) ? inArray.splice(inIndex, 1) : false );
-
-        // if no specific child was passed
-        if(inNodeMinor === null)
-        {
-            // get all the children
-            let check = N.Step(inNodeMajor, inKey);
-            if(!check){ return; }
-
-            // go down to each child ...
-            check.forEach( inNodeMinor => 
-            {
-                let connections = inNodeMinor.Link[inKey];
-                remove( connections.Get, inNodeMajor); // ... and remove any reference to the parent
-
-                // if after the remove operation, this child has no connections on inKey, scrub the key
-                if(!connections.Set.length && !connections.Get.length)
-                {
-                    delete inNodeMinor.Link[inKey];
-                }
-            });
-
-            // we just wiped out all outgoing connections to the parent, if incoming connections are empty too we can purge the key there as well
-            if(inNodeMajor.Link[inKey].Get.length == 0)
-            {
-                delete inNodeMajor.Link[inKey];
-            }
-            return;
-        }
-
-        // if no specific parent was passed
-        if(inNodeMajor === null)
-        {
-            // get all the parents
-            let check = N.Step(inNodeMinor, inKey, false);
-            if(!check){ return; }
-            
-            // go up to each parent ...
-            check.forEach( inNodeMajor => 
-            {
-                let connections = inNodeMajor.Link[inKey];
-                remove( connections.Set, inNodeMinor); // ... and remove any reference to the child
-                
-                // if after the remove operation, this parent has no connections on inKey, scrub the key
-                if( !connections.Set.length && !connections.Get.length )
-                {
-                    delete inNodeMajor.Link[inKey];
-                }
-            });
-
-            // we just wiped out all incoming connections to the child, if outgoing connections are empty too we can purge the key there as well
-            if(inNodeMinor.Link[inKey].Set.length == 0)
-            {
-                delete inNodeMinor.Link[inKey];
-            }
-            return;
-        }
-
-        // if a specific parent and child were passed
-        if(inNodeMajor.Link[inKey].Set.length == 1)
-        {
-            delete inNodeMajor.Link[inKey];
-        }
-        else
-        {
-            remove(inNodeMajor.Link[inKey].Set, inNodeMinor);
-        }
-        if(inNodeMinor.Link[inKey].Get.length == 1)
-        {
-            delete inNodeMinor.Link[inKey];
-        }
-        else
-        {
-            remove(inNodeMinor.Link[inKey].Get, inNodeMajor);
-        }
-
-    },
-    Step(inNode, inKey, inForward, inForceCreate)
-    {
-        let connectionGroup = inNode.Link[inKey];
-        if(!connectionGroup)
-        {
-            if(inForceCreate === true)
-            {
-                inNode.Link[inKey] = connectionGroup = {Get:[], Set:[]};
-            }
-            else
+            N.Walk((child) =>
             {
+                console.log(`subdividing ${child.Meta}`);
+                context = [child, depth+1];
+                recurse(child, depth+1);
                 return false;
             }
-        }
-        return (inForward === undefined || inForward === true) ? connectionGroup.Set : connectionGroup.Get;
-        
-    },
-    Walk(inIterator, inNode, inKey, inForward, inTerminal)
-    {
-        let array = N.Step(inNode, inKey, inForward);
-
-        if(!array.length && inTerminal)
-        {
-            return inTerminal(inNode);
-        }
-
-        for(let i=0; i<array.length; i++)
-        {
-            let next = array[i];
-            if(next.ID.Walk !== N.ID.Walk)
-            {
-                next.ID.Walk = N.ID.Walk;
-                //console.log("processing", next.Meta)
-                let results = inIterator(next);
-                if(results !== false)
-                {
-                    N.Walk(inIterator, next, inKey, inForward, inTerminal);
-                }
-                else
-                {
-                    //console.log("routine exited");
-                }
-            }
-            else
-            {
-                //console.log("id collision");
-            }
-        }
-    },
-    Path(inArray, inNode, inKey, inForward)
-    {
-        var current = inNode;
-        var direction = inForward||true;
-        for(let i=0; i<inArray.length; i++)
-        {
-            current = N.Step(current, inKey, direction)[inArray[i]];
-        }
-        return current;
-    }
-};
-</script>
-
-<!-- Pivot -->
-<script>
-var Pivot = 
-{
-    Leaves:{},
-    Root:N.Create({Label:"All Pivots"}),
-    Schema:N.Create({Label:"Column Details"}),
-    Proto:N.Create({Label:"User Form"}),
-    Init(inColumnNames, inColumnTypes, inRows)
-    {        
-        for(let i=0; i<inColumnNames.length; i++)
-        {
-            let columnNode = N.Create({Label:inColumnNames[i], Index:i});
-            N.Connect(Pivot.Schema, columnNode, inColumnTypes[i]);
-            N.Connect(Pivot.Schema, columnNode, "all");
-        }
-        Pivot.Leaves = inRows.map(r => N.Create({Row:r}));
-        Pivot.Init = ()=>{};
-    },
-    Pivot(inRoot, inParent, inPivotIndicies, inSumIndicies, inDepth)
-    {
-        //arguments:
-        //    - a Node with leaf Nodes temporarily stored in its Meta.Leaves
-        //        - where each leaf Node has a row of table data in it's Meta.Row
-        //    - a list of columns to pivot on
-        //    - a list of columns to sum
-        //    - optional traversal depth, defaults to 0
-        let depth = inDepth||0;
-        let uniques = {};
-        let indexPivot = inPivotIndicies[depth];
-        if(!inParent.Meta.Leaves)
-        {
-            console.log("problem")
-        }
-        inParent.Meta.Leaves.forEach((inLeaf)=>
-        {
-            let row = inLeaf.Meta.Row; // shorthand for the raw "CSV" row in the leaf Node's Meta
-            let value = row[indexPivot]; // get the pivot column
-            let match = uniques[value]; // check in the uniques list if this pivot column exists
-            if(!match)
-            {
-                // if not, store a value under that key that will be the meta object for a new child
-
-                let clone = row.map(r=>null);
-                inSumIndicies.forEach((inSumIndex, inIndex, inArray)=>
-                {
-                    clone[inSumIndex] = row[inSumIndex]
-                });
-                match = uniques[value] = {
-                    Label:value,
-                    Row:clone, 
-                    IndexPivot:indexPivot,
-                    IndexSum:inSumIndicies,
-                    Leaves:[],
-                    Depth:depth
-                };
-                // grow a child off of the parent using the meta object
-                N.Connect(inParent, N.Create(match), "Hierarchy");
-            }
-            else
-            {
-                // if a match does exist, sum the appropriate columns
-                inSumIndicies.forEach((inSumIndex) => match.Row[inSumIndex] += row[inSumIndex]);
-            }
-            // move the leaves into the child
-            match.Leaves.push(inLeaf);
-        });
-        
-        // get the leaves out of the parent, at this point they have been re-distributed to the children
-        delete inParent.Meta.Leaves;
-        let iterator = () => {};
-        if(depth >= inPivotIndicies.length-1)
-        {
-            iterator = inLastBranch =>
-            {
-                inLastBranch.Meta.Leaves.forEach( inLeaf =>
-                {
-                    // collect modifiers effecting leaves
-                    let modifiers = [];
-                    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;
-                        connectModifiers(inLastBranch);
-
-                        // also walk them up and connect, but with "check unique" enabled
-                        console.log("walking modifiers up from", inLastBranch.Meta.Label);
-                        N.ID.Walk++;
-                        N.Walk(connectModifiers, inLastBranch, "Hierarchy", false);
-                        /*
-                        N.Walk((n)=>
-                        {
-                            console.log("going up", n);
-                        }
-                        , inLastBranch, "Hierarchy", false);
-                        */
-
-                    }
-
-                    // lastly connect the leaf to the branch
-                    N.Connect(inLastBranch, inLeaf, "Leaf");
-
-                });
-                delete inLastBranch.Meta.Leaves;
-            }
+            , node, "parent");
         }
         else
         {
-            iterator = child => {
-                if(child.Meta.Label == "b")
+
+            N.Walk((child) =>
+            {
+                /*
+                    issue: why does incrementing walk id cause an infinite loop
+                */
+                N.ID.Walk++;
+                console.log(`changing walk ID ${child.Meta}`);
+                if(N.ID.Walk > 20)
                 {
-                    console.log("at b for some reason");
+                    console.log("big problems");
+                    throw new Error("holy crap");
                 }
-                Pivot.Pivot(inRoot, child, inPivotIndicies, inSumIndicies, depth+1);
-            };
-        }
-        N.Walk(iterator, inParent, "Hierarchy");
-        
-        return inParent;
-    },
-    Create(inPivotIndicies, inSumIndicies)
-    {
-        N.ID.Walk++;
-        
-        let columns = N.Step(Pivot.Schema, "all");
-        let label = inPivotIndicies.map( inPivotIndex =>
-        {
-            return columns[inPivotIndex].Meta.Label;
-        });
-
-        let pivotRoot = N.Create({Label:label.join("|"), Leaves:Pivot.Leaves});
-        N.Connect(Pivot.Root, pivotRoot, "Pivot");
-        return Pivot.Pivot(pivotRoot, pivotRoot, inPivotIndicies, inSumIndicies);
-    },
-    Delete(inRoot)
-    {
-        // disconnect modifiers
-        let check = N.Step(inRoot, "ModifyUp", false);
-        if(check)
-        {
-            while(check.length>0)
-            {
-                Pivot.Unmodify(check[0]);
+                return false;
             }
+            , node, "parent");
         }
-
-        // disconnect leaves from terminal branches
-        N.Walk(()=>{}, inRoot, "Hierarchy", true, terminal=>{
-            N.Disconnect(terminal, null, "Leaf");
-        });
-
-        // disconnect from app
-        N.Disconnect(null, inRoot, "Pivot");
-    },
-    Modify(inNode)
-    {
-        let modified = N.Create({Label:"Modifier"});
-
-        // traverse
-        let gatherUp   = n => N.Connect(modified, n, "ModifyUp");
-        let gatherDown = n => N.Connect(modified, n, "ModifyDown");
-        let gatherOut  = n => N.Connect(modified, n, "ModifyOut");
-
-        N.ID.Walk++;
-        inNode.ID.Walk = N.ID.Walk;
-        
-        // at
-        N.Connect(modified, inNode, "ModifyAt");
-        
-        // up
-        N.Walk(gatherUp, inNode, "Hierarchy", false);
-
-        // down 1
-        N.Walk(gatherDown, inNode, "Hierarchy", true, terminal=>
-        {
-            // down 2
-            // for each terminal node, step down into its leaves and gather down
-            N.Walk(gatherDown, terminal, "Leaf", true, leaf=>
-            {
-                // out 1
-                // walk back up on the leaf connections on other trees
-                N.Walk(gatherOut, leaf, "Leaf", false, terminal=>
-                {   
-                    // out 2
-                    // and continueup the hierarchy
-                    N.Walk(gatherOut, terminal, "Hierarchy", false);
-                });
-            });
-        });
-
-        return modified;
-    },
-    Unmodify(inModifier)
-    {
-        N.Disconnect(inModifier, null, "ModifyUp");
-        N.Disconnect(inModifier, null, "ModifyDown");
-        N.Disconnect(inModifier, null, "ModifyOut");
-        N.Disconnect(inModifier, null, "ModifyAt");
-        N.Disconnect(null, inModifier, "Modifier");
     }
-};
-</script>
-
-<!-- rendering -->
-<script type="module">
-
-Pivot.Init(
-    ["id", "type-a", "type-b", "count", "extra"],
-    ["label", "label", "label", "sum", "sum"],
-    [
-    ["#1", "a", "long",  1, 4],
-    ["#2", "b", "long",  2, 4],
-    ["#3", "b", "short", 2, 4],
-    ["#4", "a", "long",  3, 4],
-    ["#5", "b", "short", 1, 4],
-    ["#6", "a", "short", 0, 4],
-    ["#7", "b", "short", 7, 4]
-    ]
-);
-
-import { h, render, createContext, Fragment } from 'https://cdn.skypack.dev/preact';
-import { useReducer, useState } from 'https://cdn.skypack.dev/preact/hooks';
-import { css, cx } from 'https://cdn.skypack.dev/@emotion/css';
-import htm from 'https://unpkg.com/htm?module';
-const html = htm.bind(h);
-
-let PivotForm = props =>
-{
-    let styles = css`
-        position:realtive;
-        box-sizing: border-box;
-        padding: 10px;
-        color:black;
-        font-family:sans-serif;
-
-        .Title
-        {
-            font-size:24px;
-            font-weight:100;
-        }
-
-        .Section
-        {
-            padding:10px 0 10px 0;
-
-            .Heading
-            {
-                display:inline-block;
-                color:#666;
-                font-family:sans-serif;
-                font-size:12px;
-                font-weight:900;
-                text-transform:uppercase;
-            }
-            .Group
-            {
-                display:inline-block;
-                padding:5px;
-                border-radius:5px;
-                margin:3px;
-                background:rgba(0, 0, 0, 0.3)
-            }
-        }
-    `;
-
-
-    let pivotColumns = N.Step(Pivot.Schema, "label")||[];
-    let pivotColumnsUsed = N.Step(Pivot.Proto, "used-pivot")||[];
-
-    let sumColumns = N.Step(Pivot.Schema, "sum")||[];
-    //let sumColumnsUsed = N.Step(Pivot.Proto, "used-sum")||[];
-
-    let indiciesPivot = pivotColumnsUsed.map(node=>node.Meta.Index);
-    let indiciesSum = sumColumns.map(node=>node.Meta.Index);
-    //let indiciesSum = sumColumnsUsed.map(node=>node.Meta.Index);
-    
-    let displayPivotsAll = html`
-    <div class="Section">
-        <div class="Heading">Available Columns</div>
-        <div class="Group">
-        ${pivotColumns.map( columnPivot =>
-        {
-            let attributes = {};
-            if(N.Step(columnPivot, "used-pivot", false))
-            {
-                attributes.disabled = true;
-            }
-            else
-            {
-                attributes.onClick = e=>
-                {
-                    N.Connect(Pivot.Proto, columnPivot, "used-pivot");
-                    Render();
-                }
-            }
-            return html`<button ...${attributes}>${columnPivot.Meta.Label}</button>`;
-        })}
-        </div>
-    </div>
-    `;
-
-    let displayPivotsPending = null;
-    if(pivotColumnsUsed.length)
-    {
-        displayPivotsPending  = html`
-        <div class="Section">
-            <div class="Heading">Pending Pivot</div>
-            <div class="Group">
-                ${pivotColumnsUsed.map(columnPivot=>html`
-                <button onClick=${e=>{N.Disconnect(Pivot.Proto, columnPivot, "used-pivot");Render();}}>
-                    ${columnPivot.Meta.Label}
-                </button>
-                `)}
-            </div>
-
-            <button onClick=${e=>{
-                N.Disconnect(Pivot.Proto, null, "used-pivot");
-                N.Disconnect(Pivot.Proto, null, "used-sum");
-                Pivot.Create(indiciesPivot, indiciesSum);
-                Render();
-            }}>Create</button>
-        </div>
-        `;
-    }
-
-    return html`
-    <div class=${styles}>
-        <div class="Title">Create New Pivot</div>
-        ${displayPivotsAll}
-        ${displayPivotsPending}
-    </div>
-    `;
-}
-
-let Section = props =>
-{
-    let styles = css`
-        .Heading
-        {
-            padding:6px 0 6px 0;
-            color:#666;
-            font-weight:900;
-            font-size:12px;
-            text-transform:uppercase;
-            cursor:pointer;
-
-            span
-            {
-                display:inline-block;
-                width:20px;
-                height:20px;
-                margin-right:10px;
-                border-radius:20px;
-                background:black;
-                color:white;
-                text-align:center;
-            }
-        }
-        .Heading:hover
-        {
-            color:black;
-        }
-        .Body
-        {
-            position:relative;
-            padding:10px 0 20px 30px;
-            &::before
-            {
-                content: " ";
-                display:block;
-                position:absolute;
-                top:-8px;
-                left:8px;
-                width:3px;
-                height:100%;
-                background:black;
-            }
-        }
-    `;
-
-    let [openGet, openSet] = useState(false);
-    return html`
-        <div class=${styles}>
-            <div class="Heading" onClick=${e=>openSet(!openGet)}>
-                <span>${openGet ? `−` : `+`}</span>
-                ${props.label}
-            </div>
-            ${ openGet ? html`<div class="Body">${props.children}</div>` : null }
-        </div>
-    `;
-}
-
-let ModificationsIcon = ({node}) =>
-{
-    let modsUp   = N.Step(node, "ModifyUp",   false)||[];
-    let modsDown = N.Step(node, "ModifyDown", false)||[];
-    let modsAt   = N.Step(node, "ModifyAt",   false)||[];
-    let modsOut  = N.Step(node, "ModifyOut",  false)||[];
-
-
-    let padding = 7;
-    let icon = 0;
-    let styles = css`
-        position:relative;
-        display:inline-block;
-        vertical-align:middle;
-        width:${padding*2 + icon}px;
-        height:${padding*2 + icon}px;
-        margin:${padding};
-        .Icon
-        {
-            position:absolute;
-            display:inline-block;
-            width:${padding*2 + icon}px;
-            height:${padding*2 + icon}px;
-            text-align:center;
-            font-size:9px;
-            font-family:sans-serif;
-            font-weight:900;
-            line-height:${padding*2 + icon}px;
-
-            &::after
-            {
-                content:" ";
-                display:block;
-                position:absolute;
-                width:${icon}px;
-                height:${icon}px;
-                border:${padding}px solid transparent;
-            }
-
-            &.Down
-            {
-                left:0;
-                bottom:100%;
-                &::after
-                {
-                    top:100%;
-                    border-top-color:green;
-                    border-bottom:0px solid transparent;
-                }
-            }
-            &.At
-            {
-                top:0;
-                left:100%;
-                &::after
-                {
-                    top:0;
-                    right:100%;
-                    border-right-color:red;
-                    border-left:0px solid transparent;
-                }
-            }
-            &.Up
-            {
-                left:0;
-                top:100%;
-                &::after
-                {
-                    bottom:100%;
-                    border-bottom-color:orange;
-                    border-top:0px solid transparent;
-                }
-            }
-
-            &.Out
-            {
-                top:0;
-                right:100%;
-                &::after
-                {
-                    top:0;
-                    left:100%;
-                    border-left-color:grey;
-                    border-right:0px solid transparent;
-                }
-            }
-        }
-
-    `;
-
-    return html`
-    <div class=${styles}>
-        ${modsDown.length ? html`<div class="Icon Down">${modsDown.length}</div>` : null}
-        ${modsAt.length ? html`<span class="Icon At">${modsAt.length}</span>` : null}
-        ${modsUp.length ? html`<span class="Icon Up">${modsUp.length}</span>` : null}
-        ${modsOut.length ? html`<span class="Icon Out">${modsOut.length}</span>` : null}
-    </div>
-    `;
-
-};
-
-let PivotBranch = props =>
-{
-    let row = props.node.Meta.Row;
-    let displayCells = row.map(column=>h("td", null, column));
-    let displayCellsModify = row.map(column=>false);
-    props.node.Meta.IndexSum.forEach(i=>
-    {
-        displayCellsModify[i] = html`<td><input type="number" value=${row[i]}/></td>`;
-    });
-    displayCellsModify.forEach((cell, i)=>
-    {
-        if(!cell)
-        {
-            displayCellsModify[i] = html`<td>${row[i]}</td>`
-        }
-    });
-
-    let modifier = N.Step(props.node, "ModifyAt", false);
-    let modifierDisplay = false;
-    if(modifier)
-    {
-        modifierDisplay = html`<button onClick=${e=>{Pivot.Unmodify(modifier[0]); Render();}}>-</button>`;
-    } 
-    else
-    {
-        modifierDisplay = html`<button onClick=${e=>{Pivot.Modify(props.node); Render();}}>+</button>`;
-    }
-
-    return html`
-    <tbody>
-        <tr>
-            <td>
-                <${ModificationsIcon} node=${props.node}><//>
-                <strong class=${css`margin-left:${props.node.Meta.Depth*10}px;`}>${props.node.Meta.Label}</strong>
-                ${modifierDisplay}
-            </td>
-            ${displayCells}
-        </tr>
-    
-    </tbody>
-    `;
-};
-
-let PivotRoot = ({pivot}) =>
-{
-
-    let stylesRoot = css`
-        display:block;
-        box-sizing:border-box;
-        padding:15px;
-        font-family:sans-serif;
-    `;
-    let stylesHeading = css`
-        margin: 0 0 15px 0;
-        font-weight:0;
-        font-size:24px;
-    `;
-
-    let modifiers = N.Step(pivot, "ModifyUp", false) || [];
-    let handleDelete = ()=>
-    {
-        Pivot.Delete(pivot);
-        Render();
-    };
-
-    let rows = [];
     N.ID.Walk++;
-    N.Walk(n=>rows.push(h(PivotBranch, {node:n}, null)), pivot, "Hierarchy");
-
-    return html`
-    <div class=${stylesRoot}>
-        <div key="heading" class=${stylesHeading}>${pivot.Meta.Label}</div>
-        <${Section} key="settings" label=${`Settings`}>
-            <button onClick=${handleDelete}>Destroy Pivot</button>
-        <//>
-        <${Section} key="tree" label=${"Tree"}>
-            <table>
-            ${rows}
-            </table>
-        <//>
-    </div>
-    `;
-};
-
-let ElRoot = props =>
-{
-    let pivots = N.Step(Pivot.Root, "Pivot")||[];
-    return h("div", null, [
-        h(PivotForm),
-        pivots.map(pivot=>h(PivotRoot, {key:pivot.Meta.Label, pivot}))
-    ])
-};
-const Render = () => render(h(ElRoot), document.querySelector("#app"));
-Render();
-
-
-Pivot.Create([1, 2], [3, 4]);
-let pivot = N.Path([0], Pivot.Root, "Pivot");
-let node = N.Path([0, 1], pivot, "Hierarchy");
-Pivot.Modify(node);
-Pivot.Create([2, 1], [3, 4]);
-Render();
+    context = [root, 0];
+    recurse(root, 0);
 
 </script>
 
-<!-- testing area -->
-<script>
+    </body>
 
-    /*
-    let ModificationPull = (inDAG) =>
-    {
-        let collect = inArray => n => { n.Meta.Tweak.forEach((t, i)=>{ inArray[n.Meta.Indicies[i]] += t; }); };
-        let totalScale = [0, 0, 0, 0, 0, 0, 0, 0];
-        let totalAdd = [0, 0, 0, 0, 0, 0, 0, 0];
-    
-        N.ID.Walk++;
-        N.Walk(collect(totalScale), inDAG, "ModifyAt", false);
-        N.Walk(collect(totalScale), inDAG, "ModifyDown", false);
-        N.Walk(collect(totalAdd), inDAG, "ModifyUp", false);
-        N.Walk(collect(totalAdd), inDAG, "ModifyOut", false);
-    
-        return [totalScale, totalAdd];
-    };
-    
-    let dag1 = N.Create({Label:"dag-1"});
-    let m0 = N.Create({Label:"m-0", Tweak:[-1, 2, 0.7], Indicies:[0, 1, 2]});
-    let m1 = N.Create({Label:"m-1", Tweak:[0.1, 0.1, 0.1], Indicies:[1, 2, 3]});
-    
-    N.Connect(m0, dag1, "ModifyAt");
-    N.Connect(m1, dag1, "ModifyDown");
-    
-    let results = ModificationPull(dag1);
-    console.log(results);
-    */
-    
-</script>
+</html>