public abstract class ASTNode3 extends ASTNode { ASTNode child1; ASTNode child2; ASTNode child3; public ASTNode3(ASTNode c1, ASTNode c2, ASTNode c3) { child1 = c1; child2 = c2; child3 = c3; } public ASTNode getChild1() { return child1; } public ASTNode getChild2() { return child2; ...
I have a binary, the database table of relationships looks like this: +----+----------+---------+-----+ | id | parentID | childID | pos | +----+----------+---------+-----+ | 1 | 1 | 2 | l | | 2 | 1 | 3 | r | | 3 | 2 | 4 | l | | 4 | 3 | 5 | r | | 5 | 4 | 6 | l ...
Does anyone know how to remove Treeitems from a Treechildren node in ZK? I have tried using an iterator and removeChild but a ConcurrentModificationException! List<Treeitem> myTreeItems = treechildren.getChildren(); Iterator<Treeitem> iterator = myTreeItems.iterator(); while (iterator.hasNext()){ myItem = (Treeitem)iterator.next();...
Mission I'm trying to find out the count of children in a set of tables illustrated below. The enviroment is LAMP but help in the right direction via other syntaxes are appreciated. Table structure users ----- user_id parent_id user_meta --------- user_id registration_date user_levels ----------- user_id level This basic struc...
Hi, in C++ Template Metaprogramming : Concepts, Tools, and Techniques from Boost and Beyond ... One drawback of expression templates is that they tend to encourage writing large, complicated expressions, because evaluation is only delayed until the assignment operator is invoked. If a programmer wants to reuse some intermediate res...
I'm creating a tree structure that is based on an AbstractNode class. The AbstractNode class has a generic collection property that contain its child nodes. See the code example below. Is there some way, possibly using generics, that I can restrict a concrete version of AbstractNode to only allow one type of child node? See the code bel...
i am currently implementing a binary tree in c++ and i want to traverse it with a function called in_order(). is there any way to pass a function as an argument, so that i can do things like below (without having to write the code to traverse the list more than once)? struct tree_node; // and so on class tree; // and so on void ...
I have a collection of trees whose nodes are labelled (but not uniquely). Specifically the trees are from a collection of parsed sentences (see http://en.wikipedia.org/wiki/Treebank). I wish to extract the most common subtrees from the collection - performance is not (yet) an issue. I'd be grateful for algorithms (ideally Java) or pointe...
I'm having problems updating the tree control with the current selected item based on the address bar. so basically when i put this on the address bar: main.html#/0.0 - category 1 should be selected main.html#/0.1 - category 2 should be selected It seems that the variable I created (idset) is always null everytime it enters the initTr...
I'm pretty new to Haskell and still have some problems getting my head around functional programming. With that said: I have a custom n-ary tree datatype data Tree = Empty | Leaf String | Node String [Tree] I'm trying to write a function to replace an element in a tree, i.e. replaceInTree :: String -> String -> Tree -> Maybe Tree ...
An n-ary tree is memorised in the following way: (node (list-subtree-1) (list-subtree-2) ...) As an example, the tree A / \ B C / \ D E is represented as follows: (A (B) (C (D) (E))) Return the number of levels of a tree The problem is that I am only allowed to use the following functions: null, car, cdr, equal, atom, ...
I need a tree plugin that has the following functionality: - add nodes (to any given node) - delete nodes (any node) - collapsable/expandable - easy access to the tree data (not sure if it is possible) Which plug-in would you recommend? ...
I have a data type data KTree a = Empty | Leaf a | Node a [KTree a] deriving (Eq, Show) I would like to write a function that returns either true or false as to whether an item is contained within my tree. ktreeContains :: Eq a => a -> (KTree a) -> Bool ktreeContains _ Empty = False ktreeContains y (Leaf x) = (x==y) -- code for node...
I've been working on porting a C# implementation of a LLRBT to F# and I now have it running correctly. My question is how would I go about optimizing this? Some ideas I have Using a Discriminated Union for Node to remove the use of null Remove getters and setters you cant have a null attribute and a struct at the same time Full ...
If anyone can point me into direction where i can find an easy to understand impl. of binomial tree, that would be very helpful. thx tree should look like in this article: http://software.intel.com/en-us/articles/high-performance-computing-with-binomial-option-pricing-part-1/ ...
I want to color(and give an icon to) a particular node of a JTree as opposed to in groups like OpenNode, LeafNode etc. How do I go about doing this? ...
I've got a database table that represents a bunch of trees. The first three columns are GUIDs that look like this: NODE_ID (PK) PARENT_NODE_ID (FK to same table, references NODE_ID) TREE_ID (FK to another table) It's possible to move a node to a different tree. The tricky part is bringing all its child-nodes with it. That takes a r...
If I have 10 elements and starting with an empty tree, What is the complexity of inserting 10 elements into Red Black in big-O notation? Is it going to be more than O(log 10) because each time it inserts an element, it has to search for appropriate location for the element and performs a series of rotations between ancestor nodes and c...
Hello, I want to generate a pretty image of my tree/graph data. I had a look at Graphviz, but the renderings are not great. Do you know of a solution that will produce pretty images and run on Linux? ...
I've the following category structure: - Transport (10) - Cars (5) - Audi (2) - BMW (3) - ... - Spare Parts (5) - Audi (5) - Audi glass (1) - Carburetors (4) - Mirrors - ... - Buses - Spare Parts (5) - Audi (5) - Audi glass (1...