PDF Download Pearls of Functional Algorithm Design
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Pearls of Functional Algorithm Design
PDF Download Pearls of Functional Algorithm Design
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Review
"Though the writing is crisp, and the explanations lucid, this is not an easy book to read. The difficulty lies in the density of ideas presented. The rewards of persevering are definitely worth it, though. In fact, once immersed, I started to ponder where this material would lead to: which algorithms could be even further generalized, what would many of these algorithms look like if implemented in Coq or Agda, and so forth. This is the effect that all good books have on me: well-presented and well-motivated material strives to become a stepping stone to further discovery. Any serious computer scientist would benefit from reading and properly understanding this book. Jacques Carette, Computing Reviews
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Book Description
Richard Bird takes a radical approach to algorithm design, namely, design by calculation. This unique collection of 30 programming problems draws from various sources including games and puzzles, sorting, and problems in data compression.
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Product details
Hardcover: 290 pages
Publisher: Cambridge University Press; 1 edition (November 1, 2010)
Language: English
ISBN-10: 9780521513388
ISBN-13: 978-0521513388
ASIN: 0521513383
Product Dimensions:
6.9 x 0.7 x 9.7 inches
Shipping Weight: 1.6 pounds (View shipping rates and policies)
Average Customer Review:
3.8 out of 5 stars
11 customer reviews
Amazon Best Sellers Rank:
#595,465 in Books (See Top 100 in Books)
While this appears to be an excellent text, the author uses a number of mathematical symbols which are not rendered correctly in the Kindle edition. They are sometimes rendered with a question mark or a rectangular box. This can make the derivations difficult to follow. Since this book is also somewhat expensive for a Kindle edition, if you can afford it, you should probably go for the paper version (assuming the paper version is typeset correctly).
I was one of those people who had learned the fundamentals of algorithms from the Programming Pearls (2nd edition) by Bentley. I have to say that since that text, many has written books about programming and algorithms in general and not one had the stuff to call it "pearl". I think this one came close to achieving the similar goal as the original one, but in the domain of functional programming. For those of you who have not read the original pearls, these books are almost like a collection of publication papers, but very well explained and throughly put into a programming environment. Another most important feature of this book (and the original pearls) is that each chapter is about a single problem that has a unique characteristic in algorithms. While most other algorithms books are organized by data structure types, these ones are focused in the category of problems. I have to say that this is the most intuitive form for people interested in algorithms.Haskell is a perfect choice of language. However, I don't think this book is just for Haskell programmers. Some of most intriguing problems are covered in very good structure. My favorites are the coverage of saddleback search, last tail, raking suffixes and nexuses. All others topics are really well done, but these were the topics that I had hard time googling for a good explanation. Great work.
The book's title is deceptively simple and too inviting for beginners. A better title would be, "Optimizing algorithms with equational reasoning."In this book, a "pearl" means starting with a brute force algorithm, then incrementally rewriting it into an efficient algorithm. Incrementally improving an algorithm sounds intriguing. In practice, the book just starts swapping out parts of the algorithm, accompanied by long descriptions of why it does not change the function's specification. Rarely does the book give reasoning about why the change is being made. After reading several of these pearls, my thought process does not jive with this style. I suspect the author actually wrote the final efficient algorithm first, then the brute force algorithm, and finally went back and crafted intermediate steps.The book has many mistakes in it. Some are simply typos that most readers won't notice. Some mistakes invalidate multiple paragraphs in the proofs. Other times the book simply omits important details. For example, I spent an hour deciphering what the "building a tree with minimum height" algorithm did, but I was not convinced that the algorithm worked. I spent 2 days correcting a part of the proof that was wrong and filling in another important part that the book omitted, before I really believed that the algorithm worked.A published errata could patch up those problems. However, there is no errata on the publisher's website. Nor can I find any way to contact Richard Bird and ask him to start one.I've only read the first 8 pearls, but so far the problems those algorithms solve are definitely esoteric. Having worked 11 years as a professional developer, I have never come across any of those problems on the job or even as interview questions.All that said, reading the book is still improving my functional programming.
Bird has written a fine book, the functional analogue to Bentley's fine pieces. If there is one thing that's common to the functional attitude in program design, it's an emphasis on proof and logical consistency. Bird goes into detail and carefully shows why algorithms perform, and what their costs must be in terms of time and space complexity.One quibble: the reader, to follow the arguments, will want to write the short code selections for himself, to check Bird's arguments; he'll find himself having to define a number of Unicode mathematical operators, likeU-2209, for example. But this isn't hard to do, in Haskell.Each chapter is well-written, to the point, and closely argued. In showing the beauty of Haskell in a clear way, or showing the beauty of concrete maths in a clear way, Bird has done well.
This book really helped me think about problem solving more efficiently. Functional programming is becoming very powerful and books like this show you why. Thanks to this book, I am now writing shorter and more methodical code. Also great for honing your Haskell skills.
I love this book. Just like Jon Bentley's Pearls books, this rather thin book is quite literally a pearl of programming wisdom. Although it's angled to the functional paradigm (Haskell, which is a pleasure as well), it makes for provocative reading given that other languages like C++ and various scripting languages are increasingly including functional programming facilities. This belongs on every computer scientist's (and software engineer's) bookshelf.
i'm not entirely finished with the "pearls" yet, but so far its interesting and fun. there is a lot of great follow-on discussion for each pearl. a welcome addition to the growing collection of quality texts dealing with haskell and functional programming.
Great book !
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