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Henry S. Warren

Hacker's Delight 2nd Edition

by Henry Warren (Author)

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In Hacker’s Delight, Second Edition, Hank Warren once again compiles an irresistible collection of programming hacks: timesaving techniques, algorithms, and tricks that help programmers build more elegant and efficient software, while also gaining deeper insights into their craft. Warren’s hacks are eminently practical, but they’re also intrinsically interesting, and sometimes unexpected, much like the solution to a great puzzle. They are, in a word, a delight to any programmer who is excited by the opportunity to improve.

Extensive additions in this edition include

A new chapter on cyclic redundancy checking (CRC), including routines for the commonly used CRC-32 code
A new chapter on error correcting codes (ECC), including routines for the Hamming code
More coverage of integer division by constants, including methods using only shifts and adds
Computing remainders without computing a quotient
More coverage of population count and counting leading zeros
Array population count
New algorithms for compress and expand
An LRU algorithm
Floating-point to/from integer conversions
Approximate floating-point reciprocal square root routine
A gallery of graphs of discrete functions
Now with exercises and answers .

ISBN-10

0321842685
ISBN-13

978-0321842688
Edition

2nd
Publisher

Addison-Wesley Professional
Publication date

September 25, 2012
Language

English
Dimensions

7.68 x 1.18 x 10.24 inches
Print length

512 pages
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From the Publisher



Title	The Pragmatic Programmer	How to Use Objects	Hacker's Delight	Effective Debugging
Author	Andrew Hunt, David Thomas	Holger Gast	Henry S. Warren	Diomidis Spinellis
Page Count	352	832	512	256
Pub Date	10/20/1999	12/15/2015	9/25/2012	6/23/2016
Binding	Paperback	Hardcover	Hardcover	Paperback
Series	None	None	None	Effective Software Development Series
Description	Straight from the programming trenches, The Pragmatic Programmer cuts through the increasing specialization and technicalities of modern software development to examine the core process--taking a requirement and producing working, maintainable code that delights its users. It covers topics ranging from personal responsibility and career development to architectural techniques for keeping your code flexible and easy to adapt and reuse.	"While most developers today use object-oriented languages, the full power of objects is available only to those with a deep understanding of the object paradigm. How to Use Objects will help you gain that understanding, so you can write code that works exceptionally well in the real world. Author Holger Gast focuses on the concepts that have repeatedly proven most valuable and shows how to render those concepts in concrete code. He explores crucial intricacies, clarifies easily misunderstood ideas, and helps you avoid subtle errors that could have disastrous consequences. "	Hank Warren once again compiles an irresistible collection of programming hacks: timesaving techniques, algorithms, and tricks that help programmers build more elegant and efficient software, while also gaining deeper insights into their craft. Warren’s hacks are eminently practical, but they’re also intrinsically interesting, and sometimes unexpected, much like the solution to a great puzzle. They are, in a word, a delight to any programmer who is excited by the opportunity to improve.	Diomidis Spinellis helps experienced programmers accelerate their journey to mastery, by systematically categorizing, explaining, and illustrating the most useful debugging methods, strategies, techniques, and tools. Drawing on more than thirty-five years of experience, Spinellis expands your arsenal of debugging techniques, helping you choose the best approaches for each challenge. He presents vendor-neutral, example-rich advice on general principles, high-level strategies, concrete techniques, high-efficiency tools, creative tricks, and the behavioral traits associated with effective debugging.

Editorial Reviews

Review

“This is the first book that promises to tell the deep, dark secrets of computer arithmetic, and it delivers in spades. It contains every trick I knew plus many, many more. A godsend for library developers, compiler writers, and lovers of elegant hacks, it deserves a spot on your shelf right next to Knuth. In the ten years since the first edition came out, it’s been absolutely invaluable to my work at Sun and Google. I’m thrilled with all of the new material in the second edition.”

― Joshua Bloch

“When I first saw the title, I figured that the book must be either a cookbook for breaking into computers (unlikely) or some sort of compendium of little programming tricks. It’s the latter, but it’s thorough, almost encyclopedic, in its coverage. The second edition covers two new major topics and expands the overall collection with dozens of additional little tricks, including one that I put to use right away in a binary search algorithm: computing the average of two integers without risking overflow. This hacker is indeed delighted!”

― Guy Steele

About the Author

Henry S. Warren, Jr., has had a fifty-year career with IBM, spanning from the IBM 704 to the PowerPC and beyond. He has worked on various military command and control systems and on the SETL (SET Language) project under Jack Schwartz. Since 1973, Hank has been with IBM’s Research Division, focusing on compilers and computer architectures. He currently works on a supercomputer project aimed at an exaflop. Hank received his Ph.D. in computer science from the Courant Institute at New York University.

Product details

Publisher ‏ : ‎ Addison-Wesley Professional; 2nd edition (September 25, 2012)
Language ‏ : ‎ English
Hardcover ‏ : ‎ 512 pages
ISBN-10 ‏ : ‎ 0321842685
ISBN-13 ‏ : ‎ 978-0321842688
Item Weight ‏ : ‎ 2.95 pounds
Dimensions ‏ : ‎ 7.68 x 1.18 x 10.24 inches

Best Sellers Rank: #172,542 in Books (See Top 100 in Books)
- #8 in Computer Algorithms
- #36 in Programming Algorithms
- #115 in Computer Hacking

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There's a short bio on the back cover of Hacker's Delight.

I want to point out here the existence of www.HackersDelight.org. This site will have errata files for the book (second edition) as errors are found. It has C code for the algorithms in the book and many similar algorithms.

Customer reviews

4.6 out of 5

195 global ratings

5 star		80%
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3 star		6%
2 star		1%
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Joshua E. Hill

This is a book of my people

Reviewed in the United States 🇺🇸 on March 7, 2022

Verified Purchase

I know that my background is super odd: I have a BS in Computer Science, a background in assembly programming, and a PhD in math. Fine.

All that being said, I LOVE THIS BOOK. It just slots in such a great place, between Knuth's "Concrete Mathematics" and the architectural guide for whatever whatever hardware you program in. I LOVE LOVE LOVE it.

6 people found this helpful

Helpful

chrispyman

Magicgu, yo

Reviewed in the United States 🇺🇸 on March 23, 2018

Verified Purchase

Incredibly unique book. The techniques and algorithms are incredibly useful for embedded development, but I cannot speak to its usefulness on x86 and would advise against using many of these techniques on there where most of this is implemented in hardware.
What I got out of this:
Multiword multiplication for fast high precision fixed point on ARM chips that lack fpus, branchless integer min and max is very handy for Thumb mode, pre-computing magic numbers for division and modulus enables MUCH faster lookups in hash tables, the graphs of functions at the very end are super fascinating, and the superoptimizer this man wrote is very simple but incredibly fun to play with! I adapted it to use multithreading and it's helped me reduce some code to the simplest possible sequence. I've had special success in reducing switch cases or long conditions involving integer arithmetic.

Also I can definitely see uses for other things in the book, like the multibyte addition and the floating point chapter. Theres a little bit in there about the most famous bithack of them all. And the notation used is really clean.

This book is a gem and I hope we get more in the future. For now though I'll settle for leafing through and discovering the things I missed.

19 people found this helpful

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John Sadler

For the geek’s geek - a must have

Reviewed in the United States 🇺🇸 on December 2, 2020

Verified Purchase

This book is mind blowing. If you’ve ever gotten right down on the bare metal and need to move bits around, you may have seen a few of these ideas. For you kids who’ve never had to worry about a stray meg of memory or a GHz of CPU speed, all of this will seem completely foreign, yet intriguing if you’ve wondered what goes on when you really need things to move along smartly and you don’t have memory and clock to burn. This book is encyclopedic, and rewards reading in small doses. It’s full of clever math ideas and ways to use instructions more effectively than you’d normally expect.

2 people found this helpful

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Mreff555

Extremely valuable but niche information

Reviewed in the United States 🇺🇸 on November 22, 2018

Verified Purchase

There is a good possibility that most people who buy this will have no use for this information. If you do need it, its invaluable as a reference, and overall a great book to have on yours shelf. The book consists of recipes for simplifying many computational tasks with integers and floats using Boolean logic or mathematics. Where applicable, proofs are given. I am very happy with the content and format of this book. That being said, see my warning below.

The book reads like a textbook and contains a lot of math. Most code is presented in assembly. Explanations are given but don't expect concrete answers. Getting a solution will require a bit of analysis on your part. if you don't like math or thinking things through, do not buy this book. If you have no experience with low/mid level languages, or bitwise operations, you may find yourself a little lost.

7 people found this helpful

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Anonymous

The Definitive Book For Bit Twiddlers

Reviewed in the United States 🇺🇸 on January 15, 2020

Verified Purchase

Hacker's Delight lives up to its title. This is a captivating book. I pride myself on purchasing the best of the best. This is one of the most technical books in my library. If you are implementing a hardware feature in software to run on a virtual machine, this is the book for you. The subjects are far ranging and highly adaptable. The emphasis is on accuracy, speed, and clear explanations.

I loaned my first edition to a friend, which required that I purchase a copy of the second. The first is good and the second is better. Highly recommended.

4 people found this helpful

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Eric Nichols

Optimized divide-by-7, negative and complex bases, Hilbert curves, and so much more

Reviewed in the United States 🇺🇸 on February 25, 2018

Verified Purchase

This is fun and useful assortment of low-level coding tricks/super-efficient algorithms. For instance, there are specialized algorithms for computing integer division-by-7. Who knows when this is useful, but if you need to do it super fast, use the algorithm in this book to shave off a bunch of cycles compared with floating-point division plus rounding. That's just a taste; there are explanations of super-optimized routines for popcount (counting the # of 1s in a binary word), all sorts of other binary operation tricks, stuff of grey codes, applications of Hilbert curves to binary codes, even exotic bases for number representations such as base -2 (negative 2) or even imaginary/complex bases (who knew these even existed?) Plenty more in here -- those are just some random fun topics. If these sound interesting, you need to read this book.

6 people found this helpful

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pen name

You know that you do have to buy this book

Reviewed in the United States 🇺🇸 on August 14, 2021

Verified Purchase

If you have an appreciation of the actual engines of computing and the elegant paces you can put these through, you will thoroughly enjoy this book.

I put Warren's book in the canon of the best works in the computer science field.

3 people found this helpful

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wiredweird

Great upgrade

Reviewed in the United States 🇺🇸 on January 24, 2014

Verified Purchase

I rarely recommend a second edition of anything to someone who owns the first, but this stands out as a worthy exception. It starts with the amazing menagerie of slick tricks that the first edition had, but adds material regarding CRCs, error correction, creative arithmetic, and more. Oh, I'm sure you can get by without these for lots of purposes. When efficiency really matters, though, or when you need to work in constrained environments (like small embedded processors that lack floating point or maybe even division instructions), approaches like these more than make up for the effort involved in using them. And, if you code in VHDL or Verilog instead of sequential languages, tools like these can help you past that last nanosecond to meet timing.

Highly recommended, not just because my copy of the first edition came with so many poorly-bound, loose pages.

-- wiredweird

20 people found this helpful

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Top reviews from other countries

Oliver

Help improving code

Reviewed in the United Kingdom 🇬🇧 on August 30, 2015

Verified Purchase

This book is not one for the feint hearted. There is a lot of complex mathematical equations in the book. Its main focus is on algorithms woking with integer types to use the least amount of operations as possible. For small programs this sort of math may not be necessary, but once the program becomes large enough that a slow down is noticeable it will be good to build in better more efficient code. This sort of efficient code would be of benefit on mobile devices where there is not as much processing horsepower and less fast data access times.

If you are already a proficient programmer looking for ways to speed your code up this is an excellent resource that will be worth looking at. This is not really aimed at a beginner programmer or someone with limited mathematic skills.

4 people found this helpful

Mr Misery

Brilliant!

Reviewed in the United Kingdom 🇬🇧 on June 11, 2020

Verified Purchase

No, it's not about computer hacking! It's a collection of great algorithms that you as a Computer programmer will find fascinating to dip into!

Mr. C. A. Hinsley

awesome

Reviewed in the United Kingdom 🇬🇧 on May 12, 2013

Verified Purchase

One of the best books I've read in ages. Lots of interesting tips and ideas. Lots of 'ah ha' moments when you realise that you sort of knew this all along but now that somebody mentioned it, yeah, I'll do it that way from now on ! Pure hacker enjoyment.

2 people found this helpful

Jorge Custódio

Great book!

Reviewed in the United Kingdom 🇬🇧 on April 18, 2014

Verified Purchase

This is not a book for those that are starting to program, but for those who want to tweak your programs! You will learn some tricks, for exemple exchanging the value of two variable without using an auxiliary one.

2 people found this helpful

Dennis Blondell Decker

Even better than the first edition

Reviewed in the United Kingdom 🇬🇧 on January 27, 2013

Verified Purchase

The additions to the 1st edition and corrections of errata make this a required book on your shelf. It's a great improvement on a classic.

One person found this helpful

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