Depth first search is more memory efficient than breadth first search as you can backtrack sooner. It is also easier to implement if you use the call stack but this relies on the longest path not overflowing the stack. Also if your graph is directed then you have to not just remember if you have … Read more
Follow an implementation of naive implementation of a visitable tree: class Tree<T> implements Visitable<T> { // NB: LinkedHashSet preserves insertion order private final Set<Tree> children = new LinkedHashSet<Tree>(); private final T data; Tree(T data) { this.data = data; } void accept(Visitor<T> visitor) { visitor.visitData(this, data); for (Tree child : children) { Visitor<T> childVisitor = visitor.visitTree(child); … Read more
All these data structures are used for solving different problems: Segment tree stores intervals, and optimized for “which of these intervals contains a given point” queries. Interval tree stores intervals as well, but optimized for “which of these intervals overlap with a given interval” queries. It can also be used for point queries – similar … Read more
You do not need to create 2 tables in the database for this you can maintain it like below from one table only +——-+—————+—————————+ | id | parent_id | title | +——-+—————+—————————+ | 1 | 0 | Parent Page | | 2 | 1 | Sub Page | | 3 | 2 | Sub Sub … Read more
Preorder and postorder do not uniquely define a tree. In general, a single tree traversal does not uniquely define the structure of the tree. For example, as we have seen, for both the following trees, an inorder traversal yields [1,2,3,4,5,6]. 4 3 / \ / \ 2 5 2 5 / \ \ / / … Read more
If I were to do this, I’d probably do something like the following: For each leaf node, compute the concatenation of 0 and the hash of the node data. For each internal node, compute the concatenation of 1 and the hash of any local data (NB: may not be applicable) and the hash of the … Read more
The trick is to pass a string as the indent and to treat the last child specially: class Node { public void PrintPretty(string indent, bool last) { Console.Write(indent); if (last) { Console.Write(“\\-“); indent += ” “; } else { Console.Write(“|-“); indent += “| “; } Console.WriteLine(Name); for (int i = 0; i < Children.Count; i++) … Read more
The general way depends on whether you have a parent link in your nodes or not. If you store the parent link Then you pick: The leftmost child of the right child, if your current node has a right child. If the right child has no left child, the right child is your inorder successor. … Read more
How can you get the tree-like view of commits in terminal? git log –graph –oneline –all is a good start. You may get some strange letters. They are ASCII codes for colors and structure. To solve this problem add the following to your .bashrc: export LESS=”-R” such that you do not need use Tig’s ASCII … Read more
How to fix remove in RedBlackTree implementation?