A radix tree, also known as a compact trie, is a space-efficient data structure that is used to store strings. It is similar to a trie, but instead of storing each character in a node, it stores each character in an edge. This allows the radix tree to take up less space than a trie.
Radix trees are often used to store strings that are too long to fit in a traditional trie. They are also used to store strings that are frequently accessed, such as in a dictionary.
A radix tree is a tree-like data structure that stores strings. Each node in the radix tree represents a character in the string. The edges between nodes represent the characters that are adjacent to each other in the string.
The radix tree is similar to a trie, but instead of storing each character in a node, it stores each character in an edge. This allows the radix tree to take up less space than a trie.
The radix tree is also more efficient than a trie when it comes to searching for strings. A trie must search through all of the nodes in the tree to find a string, while a radix tree can stop searching as soon as it reaches a node that does not match the string.
Here is a simple implementation of a radix tree in JavaScript.
function RadixTree() {
this.root = new Node();
}
function Node() {
this.children = {};
}
RadixTree.prototype.insert = function(string) {
var node = this.root;
for (var i = 0; i < string.length; i++) {
var char = string[i];
if (!node.children[char]) {
node.children[char] = new Node();
}
node = node.children[char];
}
};
RadixTree.prototype.search = function(string) {
var node = this.root;
for (var i = 0; i < string.length; i++) {
var char = string[i];
if (!node.children[char]) {
return false;
}
node = node.children[char];
}
return true;
};
var tree = new RadixTree();
tree.insert("cat");
tree.insert("dog");
tree.insert("cats");
tree.insert("dogs");
console.log(tree.search("cat")); // true
console.log(tree.search("cats")); // true
console.log(tree.search("dog")); // true
console.log(tree.search("dogs")); // true
console.log(tree.search("c")); // false
console.log(tree.search("ca")); // false
console.log(tree.search("d")); // false
console.log(tree.search("do")); // false
Radix trees are a space-efficient data structure that is used to store strings. They are similar to tries, but they store each character in an edge instead of a node. This allows the radix tree to take up less space than a trie.
Radix trees are often used to store strings that are too long to fit in a traditional trie. They are also used to store strings that are frequently accessed, such as in a dictionary.