FAQ Database Discussion Community


Get Words out of a Trie Data Structure

java,search,trie
i have the following Trie Data Structure: public class CDictionary implements IDictionary { private static final int N = 'z' -'a'+1; private static class Node { private boolean end = false; private Node[] next = new Node[N]; } private int size = 0; private Node root = new Node(); @Override...

Finding the longest word from a digital tree (trie) in C++

c++,search,tree,trie
For an assignment, I had to make two methods, one prints out a digital tree storing a few words and marks a * next to an actual word. The other method is supposed to find the longest word in this digital tree. Here is the defined class (with my completed...

Java: make prefix tree remember last value that was not null

java,tree,prefix,trie
I have code for prefix tree (Trie) like this: public class Trie<V> { Entry<V> entry; char key; Map<Character, Trie<V>> childrens; public Trie() { this.childrens = new HashMap<Character, Trie<V>>(10); entry = new Entry<V>(); } /** non-public, used by _put() */ Trie(char key) { this.childrens = new HashMap<Character, Trie<V>>(10); this.key = key;...

Is there an alphabetic wchar_t such that its capital and lower versions are the same?

c,trie,wchar-t
I've been wondering whether there is a char c such that iwalpha(c) == 1 and towlower(c) == towupper(c). I'm trying to implement a dictionary in a trie. Each node has a wchar_t label and a boolean a_word which provides us with the information whether the node represents a word. I'd...

Couldn't import class to Java project

java,dependencies,trie
I am trying to import import org.apache.commons.collections4.trie.PatriciaTrie; It gives me error that it does not exists. I am using Lucene with Glassfish server. What should be done to fix that issue?...

How to scale a trie across multiple servers

architecture,system,scalability,distributed-computing,trie
Does anyone know how I might scale a Trie across multiple machines? Say the first machine runs out of space and I need to add more words from a very large dictionary, what might I do to add more words? (I am a Java thinker, but I believe the answer...

Trie Data Structure in Finding an Optimal Solution

java,algorithm,data-structures,tree,trie
This Question is part of ongoing Competition , I have solved the 75% of this Question Data Set but the 25% is giving me TLE. I am asking why it's is giving TLE an i am sure my complexity is O(n*n)Question: String S consisting of N lowercase English alphabets. We...

Retrieving a lost string from a trie

algorithm,data-structures,trie
On exam on data structures I did see the following question: A suffix trie is given. Now I know that that a trie only holds pointers with specific indexes to an array of chars. Now they claim that the original string is lost, and I should find the string only...

Trie - Implementation in java

java,trie
I know there is plenty of material available regarding it but i had quite specific questions. I have a file containing postal codes and i have to create trie data structure using those codes. I have written my implementation which is - public class Trie{ TrieNode root = null; public...

What is the most efficient way to find out which subnet an IP belongs to

algorithm,scala,data-structures,ip-address,trie
Suppose I have billions of records that contain IPv4 field each. And I want to find out: If each record belongs to one of the subnet I concerns Which subnet it belongs to if it satisfies requirement 1. Each concerned subnet is defined as several masks(61.232.85.0/25, 61.232.86.0/27) and maybe some...

Python Trie implementation why create temporary variable [closed]

python,algorithm,data-structures,implementation,trie
I looked at this code: >>> _end = '_end_' >>> >>> def make_trie(*words): ... root = dict() ... for word in words: ... current_dict = root ... for letter in word: ... current_dict = current_dict.setdefault(letter, {}) ... current_dict = current_dict.setdefault(_end, _end) ... return root ... >>> make_trie('foo', 'bar', 'baz', 'barz')...

how can an objects points on many other objects in JAVA?

java,pointers,tree,trie
I'm trying to build a TRIE, but for that I need that the root of the tree would be able to point on sons as much as I want to create (since it's supposed to use as Prefix tree). So I'd like to know if it is even possible make...