Ternary trees are an efficient structure often used for storing strings for fast lookups. This package implements a generic tree for storing lists of Ord instances, and a specialised String implementation which is about 30% faster than the generic version.
An example program is provided what shows how to use the package as a dictionary program for spell checking, and how it can be used to serialise data with Don Stewart's Data.Binary package.
From my testing, using the /usr/share/dict/words file on my system (over 230,000 words), inserting all words, checking they all exist in the tree, writing them to a binary file, reading them back in and checking the read in result is the same as the original takes slightly over 3 seconds using the StringSet. The written file is also slightly smaller than the input (by over 40% in some cases).
New in this version:
Fixed Other-Modules cabal entry so Internal files were added.
© 2009 by Alex Mason (http://random.axman6.com/blog/). BSD3 license.