By Jeffrey E. F. Friedl
Regular expressions are a really strong instrument for manipulating textual content and knowledge. they're now typical positive aspects in a variety of languages and renowned instruments, together with Perl, Python, Ruby, Java, VB.NET and C# (and any language utilizing the .NET Framework), Hypertext Preprocessor, and MySQL.
in the event you don't use general expressions but, you will find during this booklet an entire new international of mastery over your facts. in the event you already use them, you'll have fun with this book's unheard of aspect and breadth of assurance. for those who imagine you recognize all you want to learn about average expressions, this ebook is a beautiful eye-opener.
As this publication indicates, a command of standard expressions is a useful ability. commonplace expressions let you code complicated and refined textual content processing that you simply by no means imagined may be computerized. commonplace expressions can prevent time and aggravation. they are often used to craft based options to quite a lot of difficulties. as soon as you've mastered ordinary expressions, they'll develop into a useful a part of your toolkit. you are going to ask yourself the way you ever acquired by way of with out them.
but regardless of their broad availability, flexibility, and exceptional strength, normal expressions are often underutilized. but what's strength within the fingers of knowledgeable might be fraught with peril for the unwary. Mastering common Expressions may help you navigate the minefield to changing into a professional and assist you optimize your use of normal expressions.
Mastering usual Expressions, 3rd variation, now contains a complete bankruptcy dedicated to personal home page and its robust and expressive suite of normal expression capabilities, as well as more advantageous Hypertext Preprocessor insurance within the significant "core" chapters. additionally, this variation has been up-to-date all through to mirror advances in different languages, together with elevated in-depth insurance of Sun's java.util.regex package deal, which has emerged because the usual Java regex implementation.Topics include:
* A comparability of positive factors between various types of many languages and tools
* How the typical expression engine works
* Optimization (major reductions to be had here!)
* Matching simply what you will want, yet no longer what you don't want
* Sections and chapters on person languages
Written within the lucid, exciting tone that makes a posh, dry subject turn into crystal-clear to programmers, and sprinkled with strategies to complicated real-world difficulties, Mastering normal Expressions, 3rd version deals a wealth details so you might positioned to quick use.
Reviews of this re-creation and the second one edition:
"There isn't a greater (or extra invaluable) booklet on hand on commonplace expressions."
--Zak Greant, dealing with Director, eZ Systems
"A actual tour-de-force of a ebook which not just covers the mechanics of regexes in remarkable aspect but in addition talks approximately potency and using regexes in Perl, Java, and .NET...If you utilize average expressions as a part of your specialist paintings (even when you have already got an outstanding booklet on no matter what language you're programming in) i'd strongly suggest this ebook to you."
--Dr. Chris Brown, Linux Format
"The writer does a great task prime the reader from regex beginner to grasp. The publication is very effortless to learn and chock packed with worthy and correct examples...Regular expressions are precious instruments that each developer must have of their toolbox. Mastering average Expressions is the definitive consultant to the topic, and a good source that belongs on each programmer's bookshelf. Ten out of Ten Horseshoes."
--Jason Menard, Java Ranch
Read or Download Mastering Regular Expressions (3rd Edition) PDF
Similar python books
The total Developer's advisor to Python
* New to Python? The definitive advisor to Python improvement for skilled programmers
* Covers middle language good points completely, together with these present in the most recent Python releases—learn greater than simply the syntax!
* research complex subject matters akin to typical expressions, networking, multithreading, GUI, Web/CGI, and Python extensions
* comprises brand-new fabric on databases, web consumers, Java/Jython, and Microsoft place of work, plus Python 2. 6 and 3
* provides 1000's of code snippets, interactive examples, and sensible routines to reinforce your Python skills
Python is an agile, powerful, expressive, totally object-oriented, extensible, and scalable programming language. It combines the ability of compiled languages with the simplicity and fast improvement of scripting languages. In middle Python Programming, moment version, top Python developer and coach Wesley Chun is helping you examine Python speedy and comprehensively that you should instantly be triumphant with any Python project.
Using useful code examples, Chun introduces the entire basics of Python programming: syntax, gadgets and reminiscence administration, facts varieties, operators, documents and I/O, features, turbines, errors dealing with and exceptions, loops, iterators, sensible programming, object-oriented programming and extra. when you examine the center basics of Python, he indicates you what you are able to do together with your new abilities, delving into complex issues, similar to typical expressions, networking programming with sockets, multithreading, GUI improvement, Web/CGI programming and lengthening Python in C.
This variation displays significant improvements within the Python 2. x sequence, together with 2. 6 and counsel for migrating to three. It includes new chapters on database and net shopper programming, plus assurance of many new subject matters, together with new-style periods, Java and Jython, Microsoft workplace (Win32 COM patron) programming, and masses extra.
Symbolic computation is using algorithms and software program to accomplish precise calculations on symbolic mathematical expressions. It has characteristically been the protect of monolithic computing device algebra structures. SymPy places its strength inside of effortless succeed in of all Python programmers, simply an import assertion away.
Construct your own app-store-ready, multi-touch video games and purposes with Kivy! approximately This BookLearn the way to create easy to complicated useful apps fast and simply with the Kivy frameworkBend Kivy in line with your wishes through customizing, overriding, and bypassing the integrated features whilst necessaryA step by step consultant that gives a speedy and straightforward advent to video game improvement for either computer and mobileWho This ebook Is ForThis ebook is meant for programmers who're ok with the Python language and who are looking to construct laptop and cellular purposes with wealthy GUI in Python with minimum trouble.
Study simply the fundamental points of Python with out cluttering up your brain with beneficial properties you'll by no means use. This compact ebook isn't really a "best technique to write code" kind of ebook; relatively, the writer is going over his most-used capabilities, that are all you want to recognize as a newbie and a few approach past. Lean Python takes fifty eight Python equipment and capabilities and whittles them right down to 15: as writer Paul Gerrard says, "I have not stumbled on a necessity for the remaining.
Additional resources for Mastering Regular Expressions (3rd Edition)
09 # add in 9% tax Multiline Comment You can create a comment that spans any number of lines. You do this by having one line with three quote marks (single or double quotes), any number of comment lines, and ending with the same three quote characters (single or double quotes), as follows: ''' A multiline comment starts with a line of three quote characters (above) This is a long comment block It can be any length You do not need to use the # character here 30 CHAPTER 2 ■ VARIABLES AND ASSIGNMENT STATEMENTS You end it by entering the same three quotes you used to start (below) ''' There are times when you are experimenting with code that you may want to temporarily comment out a block of code.
Py program and apply this additional naming convention. Here is the original code: 28 CHAPTER 2 ■ VARIABLES AND ASSIGNMENT STATEMENTS numberOfOneDollarBills = 3 numberOfFiveDollarBills = 2 total = numberOfOneDollarBills + (numberOfFiveDollarBills * 5) Figure 2-8. Replace Dialog box. print 'Total amount is', total Apply this new naming convention to make it look like this: nOneDollarBills = 3 nFiveDollarBills = 2 total = nOneDollarBills + (nFiveDollarBills * 5) print 'Total amount is', total If you want, you can do this by making changes on each line.
Syntax Error The first type of error is a compile error (the generic name in programming), which is known as a syntax error in Python. Consider the following two-line program: learningPython = True print learningpython When this program is run, we see this: Traceback (most recent call last): File "