ykmnkmi / radix-tree.dart

Dart implementation of the Radix Tree data structure.

Radix Tree

Map based Dart implementation of the Radix Tree data structure. A radix tree maps strings to values, allowing efficient string lookup and prefix queries.

Based on radix-tree.

Usage

A simple usage example:

import 'package:radix_tree/radix_tree.dart';

void main(List<String> arguments) {
  var tree = RadixTree<int>();
  tree['paku'] = 1;
  tree['piku'] = 2;
  tree['pako'] = 3;
  tree.getValuesWithPrefix('p'); // list contains 1, 2, 3
  tree.getValuesWithPrefix('pa'); // list contains 1, 3
}

License

This project is licensed under the MIT license.

Features and bugs

Please file feature requests and bugs at the issue tracker.

radix-tree.dart's Issues

operator[] and containsKey() unnecessarily search the subtrees of the target node

Looks like if I want an exact key lookup rather than a prefix match, this library still traverses the subtrees rooted at the key's node. I'll attach a pull request to optimize this a little.