Implementing a Patricia Trie for use as a dictionary

Posted by Regis Frey on Stack Overflow See other posts from Stack Overflow or by Regis Frey
Published on 2010-03-09T03:20:46Z Indexed on 2010/03/09 3:36 UTC
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patricia-trie

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radix

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trie

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java

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python

I'm attempting to implement a Patricia Trie with the methods addWord(), isWord(), and isPrefix() as a means to store a large dictionary of words for quick retrieval (including prefix search). I've read up on the concepts but they just aren't clarifying into an implementation. I want to know (in Java or Python code) how to implement the Trie, particularly the nodes (or should I implement it recursively). I saw one person who implemented it with an array of 26 child nodes set to null/None. Is there a better strategy (such as treating the letters as bits) and how would you implement it?

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