Although all the source code for the pdf version (http://www.cs.cmu.edu/~rwh/theses/okasaki.pdf) of "Purely Functional Data Structures" is provided in Standard ML, not Haskell, I found a broken link to the supposedly equivalent Haskell source code on "Books - HaskellWiki" (http://haskell.org/haskellwiki/Books): Haskell source code for the book: http://www.cs.columbia.edu/~cdo/pfds-haskell.tar.gz Clicking on this link results in the following error: -- File Not Found The requested URL was not found on this web server: /~cdo/pfds-haskell.tar.gz You followed a link from http://haskell.org/haskellwiki/Books Contact the maintainer: [no address given]. Other solutions: * You may find what you need by performing a search in the main index for this web site. * You can perform a Google search on the departmental pages. This Columbia University Computer Science web server, www.cs.columbia.edu, is maintained by [no address given] -- Without the equivalent Haskell source code, the code must be manually translated from Standard ML into Haskell. Does anybody know why the link is broken, when it may be fixed, and from where the Haskell source code can be currently obtained? Benjamin L. Russell --- On Thu, 5/29/08, Loup Vaillant wrote:

2008/5/28 Iavor Diatchki :

...

Hi, "Purely Functional Data Structures" by Chris Okasaki is a good one. Here is a link to it on Amazon:

http://www.amazon.com/Purely-Functional-Structures-Chris-Okasaki/dp/05216635...

...

Good luck! -Iavor

Argh, I'm predated by a few seconds! :-) Before buying the book (I did), you may want to check the slightly different pdf: http://www.cs.cmu.edu/~rwh/theses/okasaki.pdf

...

2008/5/28 smellcode :

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is there some book about haskell and data struct

and alg?

...

...

i mean data struct and algorithm in haskell

i am freshman

i want to study haskell with data struct and alg

-- Hu Jinpu (nickname: smellcode) Web developer email =~ /(^hujinpu)\@(gmail)\.(com)$/ or email.gsub!(/hujinpu/, 'smellcode') http://hujinpu.net _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org

http://www.haskell.org/mailman/listinfo/haskell-cafe

...

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Looks like Okasaki moved it over when he relocated to the US Military Academy: http://www.eecs.usma.edu/webs/people/okasaki/pfds-haskell.tar.gz I've fixed it on the wiki. -johnnnnnnn On May 29, 2008, at 3:56 AM, Henk-Jan van Tuyl wrote:

On Thu, 29 May 2008 05:11:54 +0200, Benjamin L. Russell

...

wrote:

...

Although all the source code for the pdf version (http://www.cs.cmu.edu/~rwh/theses/okasaki.pdf ) of "Purely Functional Data Structures" is provided in Standard ML, not Haskell, I found a broken link to the supposedly equivalent Haskell source code on "Books - HaskellWiki" (http://haskell.org/haskellwiki/Books ):

Haskell source code for the book: http://www.cs.columbia.edu/~cdo/pfds-haskell.tar.gz

Clicking on this link results in the following error: [...]

Without the equivalent Haskell source code, the code must be manually translated from Standard ML into Haskell. Does anybody know why the link is broken, when it may be fixed, and from where the Haskell source code can be currently obtained?

It appears that http://www.cs.columbia.edu/~cdo/ does not exist anymore; probably because the owner does not study/work at the university anymore. I fixed the link, it now points to the copy stored in the Wayback Machine ( http://web.archive.org/ ). The new link is: http://web.archive.org/web/20000818044004/http:// www.cs.columbia.edu/~cdo/pfds-haskell.tar.gz

-- Met vriendelijke groet, Henk-Jan van Tuyl

-- http://functor.bamikanarie.com http://Van.Tuyl.eu/ --

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On May 30, 2008, at 5:32 AM, Benjamin L. Russell wrote:

Actually, the link now points to the following URL (updated by John Melesky):

http://www.eecs.usma.edu/webs/people/okasaki/pfds-haskell.tar.gz

instead of the following URL (set by Henk-Jan van Tuyl):

http://web.archive.org/web/20000818044004/http://www.cs.columbia.edu/ ~cdo/pfds-haskell.tar.gz

I just tested both, and they both seem to work. Perhaps both should be listed, or should we agree on just one?

I chose one over the other because it's the link the author (of the original book and of the code) provides from his (new) homepage. And because taxing archive.org when a valid alternative is available seems like poor form. This is a problem in general with Haskell code, though, since such a large portion of it is created by professors or current students: if/ when they leave their current college/university, the links tend to break. I don't know that there's a solution except vigilance. -johnnnnnnnnn

[snip]

...

Without the equivalent Haskell source code, the code must be manually translated from Standard ML into Haskell. Does anybody know why the link is broken, when it may be fixed, and from where the Haskell source code can be currently obtained?

Benjamin L. Russell

If you are interested in the topic, you will probably want to check out Edison: http://www.cs.princeton.edu/~rdockins/edison/home/.

I believe some of the older code in there was even written by Okasaki.

Indeed, the vast majority of the code was written by Okasaki. Most of the data structures from his book are in Edison. Rob Dockins