[Haskell-cafe] Building a tree?

michael rice nowgate at yahoo.com
Thu Jun 11 09:37:25 EDT 2009

Example understood. Thanks.

Is there a module for binary trees?


--- On Wed, 6/10/09, wren ng thornton <wren at freegeek.org> wrote:

From: wren ng thornton <wren at freegeek.org>
Subject: Re: [Haskell-cafe] Building a tree?
To: haskell-cafe at haskell.org
Date: Wednesday, June 10, 2009, 8:13 PM

michael rice wrote:
> Here's a function from Data.Tree:
> unfoldTree :: (b -> (a, [b])) -> b -> Tree a
> Build a tree from a seed value
> Could someone please give me a brief example of usage.

    Data.Tree> let t = unfoldTree (\i -> (show i, [i`div`2..i-1]))
    Data.Tree> putStr . drawTree $ t 8

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