Erlang BK-Tree

Filling tree

In the Erlang console initialize a tree with a root node

cd("./src").
c("bk_trees").
T = bk_trees:init("brewery").

Then add some more terms to the tree

T2 = bk_trees:insert("stone", T).
T3 = bk_trees:insert("anchorsteam", T2).
T4 = bk_trees:insert("delirium", T3).

Searching

Once you have populated the tree you can do a search.

Default depth is 1 when doing a search.

bk_trees:search("budweiser", T4).
% returns []

Increasing the depth will give you more terms that are close to your search term.

bk_trees:search("deli", T4, 4).
% returns [{4,"delirium"}]

bk_trees:search("deli", T4, 5).
% returns [{5,"stone"},{4,"delirium"}]

Tests

Run using make test