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"This Book Was a Joy to Read. It Covered All Sorts of Techniques for Debugging, Including 'Defensive' Paradigms That Will Eliminate Bugs in the First Place
Perl Debugged By Peter Scott, Ed Wright Publisher : Addison Wesley Pub Date : March 01, 2001 ISBN : 0-201-70054-9 Table of • Pages : 288 Contents "This book was a joy to read. It covered all sorts of techniques for debugging, including 'defensive' paradigms that will eliminate bugs in the first place. As coach of the USA Programming Team, I find the most difficult thing to teach is debugging. This is the first text I've even heard of that attacks the problem. It does a fine job. Please encourage these guys to write more." -Rob Kolstad Perl Debugged provides the expertise and solutions developers require for coding better, faster, and more reliably in Perl. Focusing on debugging, the most vexing aspect of programming in Perl, this example-rich reference and how-to guide minimizes development, troubleshooting, and maintenance time resulting in the creation of elegant and error-free Perl code. Designed for the novice to intermediate software developer, Perl Debugged will save the programmer time and frustration in debugging Perl programs. Based on the authors' extensive experience with the language, this book guides developers through the entire programming process, tackling the benefits, plights, and pitfalls of Perl programming. Beginning with a guided tour of the Perl documentation, the book progresses to debugging, testing, and performance issues, and also devotes a chapter to CGI programming in Perl. Throughout the book, the authors espouse defensible paradigms for improving the accuracy and performance of Perl code. In addition, Perl Debugged includes Scott and Wright's "Perls of Wisdom" which summarize key ideas from each of the chapters, and an appendix containing a comprehensive listing of Perl debugger commands. -
Practical Ruby Projects: Practical Ruby Projects Ideas for the Eclectic Programmer
CYAN YELLOW MAGENTA BLACK PANTONE 123 C BOOKS FOR PROFESSIONALS BY PROFESSIONALS® THE EXPERT’S VOICE® IN OPEN SOURCE Companion eBook Available Practical Ruby Projects: Projects Ruby Practical Ideas for the Eclectic Programmer Dear Reader, You’ve learned the basics of Ruby, and you’re ready to move on to the next level— trying out advanced techniques, mastering best practices, and exploring Ruby’s full potential. With this book you’ll learn by experience while you tackle an exciting series of varied but always practical programming projects. What is an eclectic programmer, you ask? He or she is an inquisitive thinker Practical who likes to play around with new concepts, a person who is project-oriented and enjoys coding, a person who doesn’t mind some technical depth folded in with creative excursions, and a person who is always looking for fresh ideas. This book is a little different from other computer books. It is meant to be entertaining, exciting, and intellectually challenging. Inside you’ll find a collec- tion of diverse projects, ranging from the creative to the practical, written as a nod to all the great Rubyists I’ve been privileged to know. Each chapter dives into Ruby Projects new topics and approaches meant to exercise your programming muscles. You’ll start by building a cross-platform music environment, progress to drawing animations using scalable vector graphics, and then move on to prac- tical problem solving using simulation. In addition, you’ll implement your own turn-based strategy game and build a Mac-native RubyCocoa interface to it. -
Symbols & Numbers A
ruby_02.book Page 267 Thursday, May 10, 2007 4:12 PM INDEX Symbols & Numbers \ (backslash), in regular expression, for literal characters, 144 %Q for instantiating Strings, 23, \W, in regular expression, for 108–109, 215–216, 219, 239, whitespace, 66 245, 248–250 { } (braces) %w for instantiating Arrays, 47, for blocks, 28 113, 115 for declaring Hash, 42 & (ampersand), for expressing blocks {x}, in regular expression, 79 and Procs, 105–106 - method (Hash), 93 ! (exclamation point), for destructive ||= operator, 77–78, 127 methods, 20, 22–23 | (pipe) character, in regular || (or) operator, 17 expression, 56 # character + method of Integers and Strings, 3–4 for comments, 14 + (plus sign), in regular for instance method, 234 expression, 62 #{} for wrapping expression to be = (equal sign), for assigning value to interpolated, 23 variable, 9 #! (shebang), 47 == operator, for equality testing, 14 $ (dollar sign), for bash prompt, 19 =begin rdoc, 22 * (asterisk), in irb prompt, 8 =end, 22 ** (asterisk doubled), for “to the <=> method (Comparable), 145, power of,” 72 150–151 /\d+/ in regular expression, for digits <% and %> tags, 211 only, 79 <%= tag, for printing expression, 214 :needs_data Symbol key, 116 99bottles.rb script, 20–25 :nitems Symbol key, 116 :unless0th Symbol key, 116 ? (question mark) A in predicate method names, 22 actionpack, warnings related to, 226 in regular expression, for optional Active Record, Rails dependence expressions, 144 on, 227 @ sign, for instance variable, 21–22 Agile Web Development with Rails @@ sign, for class -
Intermediate Perl
SECOND EDITION Intermediate Perl Randal L. Schwartz, brian d foy, and Tom Phoenix Beijing • Cambridge • Farnham • Köln • Sebastopol • Tokyo Intermediate Perl, Second Edition by Randal L. Schwartz, brian d foy, and Tom Phoenix Copyright © 2012 Randal Schwartz, brian d foy, Tom Phoenix. All rights reserved. Printed in the United States of America. Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472. O’Reilly books may be purchased for educational, business, or sales promotional use. Online editions are also available for most titles (http://my.safaribooksonline.com). For more information, contact our corporate/institutional sales department: 800-998-9938 or [email protected]. Editors: Simon St. Laurent and Shawn Wallace Indexer: Lucie Haskins Production Editor: Kristen Borg Cover Designer: Karen Montgomery Copyeditor: Absolute Service, Inc. Interior Designer: David Futato Proofreader: Absolute Service, Inc. Illustrator: Rebecca Demarest March 2006: First Edition. August 2012: Second Edition. Revision History for the Second Edition: 2012-07-20 First release See http://oreilly.com/catalog/errata.csp?isbn=9781449393090 for release details. Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of O’Reilly Media, Inc. Intermediate Perl, the image of an alpaca, and related trade dress are trademarks of O’Reilly Media, Inc. Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and O’Reilly Media, Inc., was aware of a trademark claim, the designations have been printed in caps or initial caps. While every precaution has been taken in the preparation of this book, the publisher and authors assume no responsibility for errors or omissions, or for damages resulting from the use of the information con- tained herein. -
Modern Perl, Fourth Edition
Prepared exclusively for none ofyourbusiness Prepared exclusively for none ofyourbusiness Early Praise for Modern Perl, Fourth Edition A dozen years ago I was sure I knew what Perl looked like: unreadable and obscure. chromatic showed me beautiful, structured expressive code then. He’s the right guy to teach Modern Perl. He was writing it before it existed. ➤ Daniel Steinberg President, DimSumThinking, Inc. A tour de force of idiomatic code, Modern Perl teaches you not just “how” but also “why.” ➤ David Farrell Editor, PerlTricks.com If I had to pick a single book to teach Perl 5, this is the one I’d choose. As I read it, I was reminded of the first time I read K&R. It will teach everything that one needs to know to write Perl 5 well. ➤ David Golden Member, Perl 5 Porters, Autopragmatic, LLC I’m about to teach a new hire Perl using the first edition of Modern Perl. I’d much rather use the updated copy! ➤ Belden Lyman Principal Software Engineer, MediaMath It’s not the Perl book you deserve. It’s the Perl book you need. ➤ Gizmo Mathboy Co-founder, Greater Lafayette Open Source Symposium (GLOSSY) Prepared exclusively for none ofyourbusiness We've left this page blank to make the page numbers the same in the electronic and paper books. We tried just leaving it out, but then people wrote us to ask about the missing pages. Anyway, Eddy the Gerbil wanted to say “hello.” Prepared exclusively for none ofyourbusiness Modern Perl, Fourth Edition chromatic The Pragmatic Bookshelf Dallas, Texas • Raleigh, North Carolina Prepared exclusively for none ofyourbusiness Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. -
Mastering Algorithms with Perl
Page iii Mastering Algorithms with Perl Jon Orwant, Jarkko Hietaniemi, and John Macdonald Page iv Mastering Algorithms with Perl by Jon Orwant, Jarkko Hietaniemi. and John Macdonald Copyright © 1999 O'Reilly & Associates, Inc. All rights reserved. Printed in the United States of America. Cover illustration by Lorrie LeJeune, Copyright © 1999 O'Reilly & Associates, Inc. Published by O'Reilly & Associates, Inc., 101 Morris Street, Sebastopol, CA 95472. Editors: Andy Oram and Jon Orwant Production Editor: Melanie Wang Printing History: August 1999: First Edition. Nutshell Handbook, the Nutshell Handbook logo, and the O'Reilly logo are registered trademarks of O'Reilly & Associates, Inc. Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and O'Reilly & Associates, Inc. was aware of a trademark claim, the designations have been printed in caps or initial caps. The association between the image of a wolf and the topic of Perl algorithms is a trademark of O'Reilly & Associates, Inc. While every precaution has been taken in the preparation of this book, the publisher assumes no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. ISBN: 1-56592-398-7 [1/00] [M]]break Page v Table of Contents Preface xi 1. Introduction 1 What Is an Algorithm? 1 Efficiency 8 Recurrent Themes in Algorithms 20 2. Basic Data Structures 24 Perl's Built-in Data Structures 25 Build Your Own Data Structure 26 A Simple Example 27 Perl Arrays: Many Data Structures in One 37 3. -
Perl Cookbook
;-_=_Scrolldown to the Underground_=_-; Perl Cookbook http://kickme.to/tiger/ By Tom Christiansen & Nathan Torkington; ISBN 1-56592-243-3, 794 pages. First Edition, August 1998. (See the catalog page for this book.) Search the text of Perl Cookbook. Index Symbols | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z Table of Contents Foreword Preface Chapter 1: Strings Chapter 2: Numbers Chapter 3: Dates and Times Chapter 4: Arrays Chapter 5: Hashes Chapter 6: Pattern Matching Chapter 7: File Access Chapter 8: File Contents Chapter 9: Directories Chapter 10: Subroutines Chapter 11: References and Records Chapter 12: Packages, Libraries, and Modules Chapter 13: Classes, Objects, and Ties Chapter 14: Database Access Chapter 15: User Interfaces Chapter 16: Process Management and Communication Chapter 17: Sockets Chapter 18: Internet Services Chapter 19: CGI Programming Chapter 20: Web Automation The Perl CD Bookshelf Navigation Copyright © 1999 O'Reilly & Associates. All Rights Reserved. Foreword Next: Preface Foreword They say that it's easy to get trapped by a metaphor. But some metaphors are so magnificent that you don't mind getting trapped in them. Perhaps the cooking metaphor is one such, at least in this case. The only problem I have with it is a personal one - I feel a bit like Betty Crocker's mother. The work in question is so monumental that anything I could say here would be either redundant or irrelevant. However, that never stopped me before. Cooking is perhaps the humblest of the arts; but to me humility is a strength, not a weakness. -
Learn Web Development with Python
Learn Web Development with Python Get hands-on with Python Programming and Django web development Fabrizio Romano Gastón C. Hillar Arun Ravindran BIRMINGHAM - MUMBAI Learn Web Development with Python Copyright © 2018 Packt Publishing All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews. Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the authors, nor Packt Publishing or its dealers and distributors, will be held liable for any damages caused or alleged to have been caused directly or indirectly by this book. Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information. First published: December 2018 Production reference: 1201218 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-78995-329-9 www.packtpub.com mapt.io Mapt is an online digital library that gives you full access to over 5,000 books and videos, as well as industry leading tools to help you plan your personal development and advance your career. For more information, please -
Ruby Cookbook, Second Edition, by Lucas Carlson and Leonard Richardson
Updated2nd for Edition Ruby 2.1 Ruby Cookbook SECOND EDITION Why spend time on coding problems that others have already solved when Programmersdon’t “ Cookbook Ruby you could be making real progress on your Ruby project? This updated livebylanguagesyn- cookbook provides more than 350 recipes for solving common problems, on topics ranging from basic data structures, classes, and objects, to web taxalone,butbyevery development, distributed programming, and multithreading. lineofconcretecode Revised for Ruby 2.1, each recipe includes a discussion on why and how theywrite.Tothatend, the solution works. You’ll find recipes suitable for all skill levels, from thisbookisfilledwith Ruby newbies to experts who need an occasional reference. With Ruby practicalrecipes,tips, Cookbook, you’ll not only save time, but keep your brain percolating with new ideas as well. knowledge,andwisdom. Ihopeitleadsreaders Recipes cover: tothenextstepofRuby ■ Data structures including strings, numbers, date and time, programming.” arrays, hashes, files, and directories —Yukihiro (Matz) Matsumoto ■ Using Ruby’s code blocks, also known as closures Creator of Ruby ■ OOP features such as classes, methods, objects, and modules ■ XML and HTML, databases and persistence, and graphics and other formats ■ Web development with Rails and Sinatra ■ Internet services, web services, and distributed programming ■ Software testing, debugging, packaging, and distributing ■ Multitasking, multithreading, and extending Ruby with other languages Ruby Lucas Carlson founded AppFog, a PaaS that leverages the open source Cloud Foundry project. A professional developer for 20 years, he specializes in Ruby on Rails development. Lucas has written Programming for PaaS and Ruby Cookbook, First Edition (both O’Reilly). He maintains a website at http://www.lucascarlson.net/. -
Ruby Cookbook.Pdf
,TITLE.21720 Page i Friday, July 7, 2006 4:42 PM Ruby Cookbook ™ ,TITLE.21720 Page ii Friday, July 7, 2006 4:42 PM Other resources from O’Reilly Related titles Ajax Hacks™ Rails Cookbook™ Ajax Design Patterns Ruby on Rails: Up and Head Rush Ajax Running oreilly.com oreilly.com is more than a complete catalog of O’Reilly books. You’ll also find links to news, events, articles, weblogs, sample chapters, and code examples. oreillynet.com is the essential portal for developers interested in open and emerging technologies, including new platforms, pro- gramming languages, and operating systems. Conferences O’Reilly brings diverse innovators together to nurture the ideas that spark revolutionary industries. We specialize in document- ing the latest tools and systems, translating the innovator’s knowledge into useful skills for those in the trenches. Visit con- ferences.oreilly.com for our upcoming events. Safari Bookshelf (safari.oreilly.com) is the premier online refer- ence library for programmers and IT professionals. Conduct searches across more than 1,000 books. Subscribers can zero in on answers to time-critical questions in a matter of seconds. Read the books on your Bookshelf from cover to cover or sim- ply flip to the page you need. Try it today for free. ,TITLE.21720 Page iii Friday, July 7, 2006 4:42 PM Ruby Cookbook™ Lucas Carlson and Leonard Richardson Beijing • Cambridge • Farnham • Köln • Paris • Sebastopol • Taipei • Tokyo ,COPYRIGHT.21583 Page iv Friday, July 7, 2006 4:42 PM Ruby Cookbook by Lucas Carlson and Leonard Richardson Copyright © 2006 O’Reilly Media, Inc. -
Andy Kwong for the Degree of Msc in Computer Science of the University of Bath
A Framework for Reactive Intelligence through Agile Component-Based Behaviors submitted by Andy Kwong for the degree of MSc in Computer Science of the University of Bath September 2003 Abstract This dissertation introduces PyPOSH, a reactive agent architecture with loadable behavioral modules based on Bryson’s Parallel-Rooted Ordered Slip-Stack Hierarchical action selection model. The framework utilizes a modular and object-oriented interface to behaviors built utilizing agile and component-based methods. Contents 1 Introduction 3 1.1 The Need for Better Behaviors . 4 1.2 Engineering Complex Scripts . 4 1.3 Agile Methodologies and Rapid Development . 5 2 Artificial Intelligence and Autonomous Agents 8 2.1 Creating Complex Agents . 9 2.2 Planning and Searching for the Next Action . 9 2.2.1 Symbolic AI and Production Systems . 10 2.2.2 Connectionist AI and Neural Networks . 11 2.2.3 Behavioral-Based AI and Reactive, Multi-Layered Architectures . 12 2.2.4 Other Approaches . 13 2.3 A brief survey of reactive architectures . 13 2.3.1 Subsumption Architecture . 13 2.3.2 Society of Mind . 14 2.3.3 Spreading Activation Networks . 15 2.4 BOD and POSH Reactive Plans . 16 3 Requirements 17 3.1 Programming Language Criteria . 18 3.1.1 LISP . 19 3.1.2 Python . 20 3.2 Incorporating Remote Invocation: Is the Framework Language Important? . 21 3.3 Cross Platform Issues . 22 3.4 Other Requirements . 22 3.5 Goal Specification . 23 3.6 Problems Not Addressed . 24 4 PyPOSH: Implementing the POSH framework in Python 25 4.1 An Overview of the PyPOSH Implementation . -
Python Frequently Asked Questions Release 3.3.3
Python Frequently Asked Questions Release 3.3.3 Guido van Rossum Fred L. Drake, Jr., editor November 17, 2013 Python Software Foundation Email: [email protected] CONTENTS 1 General Python FAQ 1 1.1 General Information.........................................1 1.2 Python in the real world.......................................4 2 Programming FAQ 7 2.1 General Questions..........................................7 2.2 Core Language............................................8 2.3 Numbers and strings......................................... 16 2.4 Performance............................................. 18 2.5 Sequences (Tuples/Lists)....................................... 20 2.6 Dictionaries.............................................. 23 2.7 Objects................................................ 24 2.8 Modules............................................... 29 3 Design and History FAQ 33 3.1 Why does Python use indentation for grouping of statements?................... 33 3.2 Why am I getting strange results with simple arithmetic operations?................ 33 3.3 Why are floating-point calculations so inaccurate?......................... 33 3.4 Why are Python strings immutable?................................. 34 3.5 Why must ‘self’ be used explicitly in method definitions and calls?................ 34 3.6 Why can’t I use an assignment in an expression?.......................... 35 3.7 Why does Python use methods for some functionality (e.g. list.index()) but functions for other (e.g. len(list))?...........................................