TclTk 8.5 Programming Cookbook.pdfWith over 100 re

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详细说明：With over 100 recipes, this Cookbook is ideal for both beginners and advanced Tcl/Tk programmers. From the basics to creating applications, it’s full of indispensable tips and tricks to make the most of the language. Overview The quickest way to solve your problems with Tcl/Tk 8. Understand the basics and fundamentals of the Tcl/Tk 8 programming language Learn graphical User Interface development with the Tcl/Tk 8 Widget set Get a thorough and detailed understanding of the concepts with a real-world address book application Each recipe is a carefully organized sequence of instructions to efficiently learn the features and capabilities of the Tcl/Tk 8 language What you will learn from this book Expand your Tcl/Tk abilities by gaining in-depth knowledge of the core commands Learn efficient programming by using control constructs in your program Handle numerous types of string expressions by performing formatting, searches, and advanced manipulations on them Gain expertise in using lists with examples teaching you the various available operations Demystify the Tcl Dictionary and learn how it can be a viable substitute for a third-party database Perform various operations on the dictionary elements in both single and multiple layer dictionaries Create, manage, and empower your Graphical User Interface with Tk window management, to develop attractive applications Ease your file system access with an in-depth study of File operations Perform advanced error trapping and recovery with error handling commands in Tcl Approach This book provides a step-by-step approach to the Tcl/Tk language with the help of re-usable examples and images. It is a series of carefully organized, easy-to-follow, standalone recipes to solve your queries. Whether you go through the recipes chapter-wise or pick up any recipe randomly, you will find clear and complete explanation of the task covered in the recipe. Who this book is written for If youTcl/Tk 8.5 Programming Cookbook Copyright 2011 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 iformation presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be 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: February 2011 Production reference: 1080211 Published by Packt Publishing Ltd 32 Lincoln road Olton Birmingham, B27 6PA, UK SBN9781849512985 www.packtpub.com Cover Image by Asher Wishkerman(a. wishkermanampic de) Credits Auth Editorial team leade Bert Wheeler Aanchal Kumar Reviewers Project Team Leader Clif Flynt Ashwin Shetty 」. Kreh bie Project Coordinate Acquisition Editor Joel goveya Steven Wilding Development Editor Jacqueline mcghee Susmita panda Production coordinator Technical edite Adline swetha jesuthas Pooja pande Cover work Indexer Adline swetha jesuthas Hemangini Bari About the author Bert wheeler was born and raised in louisville, Kentucky and is one of five sons. After graduating from high school he entered the United states Navy and later retired in 1997 after 20 years as an Air Traffic Controller. Following his military career, Bert returned to college and graduated Magna Cum Laude with a degree in computer science. After completion of his degree, bert worked in all aspects of the it and software industries in numerous positions including Software Design and Development, Project and Product Management, Director of Information Technologies, and Director of Engineering Services. He continues to work and his primary area of expertise is in the design and implementation of physical security solutions in the Access Control arena throughout the world Acknowledgment This book would not have been completed without the help of numerous individuals I would like to thank the staff at Packt Publishing for their meticulous efforts and editorial assistance throughout the completion of this book. special thanks to steven Wilding, Susmita Panda, and Joel Goveya, whose tireless efforts have guided me and kept me on track. As with all writers, it is our families that provide the support and necessary encouragement. To Claudia, my wife, partner and best friend, and my sons Jeremy, Justin, Valentino, and arrigo. Without your love and support throughout my lifetime, I would not have become who I am today thank you for everything you have done the lessons you have taught me and the love that keeps me going. I am blessed About the reviewers Clif Flynt has been a professional programmer since 1978. He has used languages TCl/Tk Clif has developed applications for many clients including the US Navh nd ranging from Am2900 microcode to high level languages such as APL, HTML, a General Mills, and McDonalds, and also for his own amusement Clif has taught computer science at grinnell college and eastern michigan University He's a member of the Washtenaw Community College Computer Science Advisory Committee. He's delivered training sessions in the US, Canada, Europe, and India, and has given talks at conferences in the Us and europe. Clif is the president and founder of the Tcl Community Association, the organization that runs the annual Tcl/Tk conference in the US and coordinates the Tcl/Tk and Open ACS involvement with Google Summer of Code. Since 1999, Clif has owned his own company Noumena Corporation. Noumena Corporation provides computer training and software development services, focusing on Tcl/ Tk and other open source technologies Clif has written Tcl/Tk for Real Programmers, Tcl/Tk: A Developer's Guide, has edited Interactive Web Applications with Icl/k(Academic Press, Schroeder/Doyle), Practical Programming in Tc//Tk(Prentice Hall, Welch/Jones/Hobbs), Tcl and the tk Toolkit(Addison Wesley, Ousterhout/Jones), and Tc//Tk Programmers Reference(Osborne, Nelson) Thomas J Krehbiel is a graduate electrical engineer with a masters' in solid state semiconductor and device physics. During his career in the semiconductor industry, he did IC circuit design, IC device design, managed a parametric test area, managed a CIM group, and worked in a ret(reticle enhancement technologies) software development group. Along the way, he created a parametric data analysis system, a wafer tracking system, and a ret processing system Thomas has many years of experience managing software development and the hardware and system associated with that development. he has programmed for over 30 years, starting with Fortran and ending with his current favorite language tcl/Tk. as computers changed, Tom worked with mainframes(IBM360), minis (DEC), and desktops (HPUX, Solaris, Linux, Windows hen he was younger, he enjoyed playing baseball, basketball, handball, tennis, hiking the grand canyon, and snow skiing wwW, PacktPub com Support files, eBooks, discount offers and more Youmightwanttovisitwww.Packtpub.comforsupportfilesanddownloadsrelatedto your book. Did you know that packt offers e book versions of every book published, with PDF and epubfilesavailable?YoucanupgradetotheebooKversionatwww.Packtpub.comand as a print book customer, you are entitled to a discount on the e Book copy. Get in touch with us at servicepacktpub com for more details. Atwww.Packtpub.comyoucanalsoreadacollectionoffreetechnicalarticlessignup for a range of free newsletters and receive exclusive discounts and offers on Packt books and e books PACKTLIB° http://packtlib.Packtpub.com Do you need instant solutions to your IT questions? PacktLib is Packt's online digital book library. Here, you can access, read and search across Packt's entire library of books Why Subscribe? Fully searchable across every book published by Packt Copy paste, print and bookmark content On demand and accessible via web browser Free Access for pac kt account holders Ifyouhaveanaccountwithpacktatwww.paCktpub.comyoucanusethistoaccess PacktLib today and view nine entirely free books Simply use your login credentials for immediate access Table of contents Preface Chapter 1: The Tcl shell 5 Introductlon 5 The tcl shell 6 Writing to the Tcl console Mathematical expressions Tcl expr operands Mathematical functions 11 Computing mathematical expressions 12 Referencing files in Tcl 13 Variables 15 Command line arguments 17 Chapter 2: Using the Building blocks Control Constructs 21 Introduction 21 Controlling flow with the if statement 23 Looping with for 24 Looping with foreach 25 Looping with while 26 Continuing a procedure 27 Breaking out of a procedure 28 Nested looping 29 Chapter 3: Error Handling 31 Introduction 31 Using the catch command 32 Using the eval command 34 Using the error command 35 Error handling procedure 36

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