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Regular Expression Examples

Regular Expression Examples
Below, you will find many example patterns that you can use for and adapt to your own purposes. Key techniques used in crafting each regex are explained, with links to the corresponding pages in the tutorial where these concepts and techniques are explained in great detail. If you are new to regular expressions, you can take a look at these examples to see what is possible. Regular expressions are very powerful. They do take some time to learn. But you will earn back that time quickly when using regular expressions to automate searching or editing tasks in EditPad Pro or PowerGREP, or when writing scripts or applications in a variety of languages. RegexBuddy offers the fastest way to get up to speed with regular expressions. Oh, and you definitely do not need to be a programmer to take advantage of regular expressions! Grabbing HTML Tags <TAG\b[^>]*>(.*?) <([A-Z][A-Z0-9]*)\b[^>]*>(.*?) Trimming Whitespace More Detailed Examples Numeric Ranges. Matching a Floating Point Number. Common Pitfalls Related:  Regular Expressionsmdelerue

Popular Tools, Utilities and Programming Languages That Support Regular Expressions These tools and utilities have regular expressions as the core of their functionality. grep - The utility from the UNIX world that first made regular expressions popular PowerGREP - Next generation grep for Microsoft Windows RegexBuddy - Learn, create, understand, test, use and save regular expressions. RegexMagic - Generate regular expressions using RegexMagic's powerful patterns instead of the cryptic regular expression syntax. General Applications with Notable Support for Regular Expressions There are a lot of applications these days that support regular expressions in one way or another, enhancing certain part of their functionality. EditPad Lite - Basic text editor that has all the essential features for text editing, including powerful regex-based search and replace. EditPad Pro - Convenient text editor with a powerful regex-based search and replace feature, as well as regex-based customizable syntax coloring and file navigation. Programming Languages and Libraries Databases

Perl tricks by Neil Kandalgaonkar Author: Neil KandalgaonkarFormatting: Laurent CAPRANI Look here for a nicer version of this page that Neil made. Contents Primality regex I found the actual one-liner Abigail originally used from How it works STATEMENT if COND Cool perl syntax, a statement may have 'modifiers' at the end like this. shift shift normally removes the first element of an array and returns that element, like popping from the beginning. 1 x shift x is the repetition operator. The logical negation of =~, will succeed if the regex does NOT match. The regular expression Example To see how it works let's consider the case of N = 9. So, you can see how this process is analogous to trying to divide a number by successively larger divisors, leaving no remainder. This vs. mine BTW: this also is much more efficient than the one I showed the group, with the addition of a single character! My regex always had to backtrack from the maximal match; since Abigail made the 11+?

Api ebay regex yahoo pipes et bibliophilie sont dans un bateau Petit exercice de style pour extraire d'ebay-France les livres anciens antérieurs à 1800. Pour cela, j'ai utilisé un Yahoo Pipe appelé Ebay Search que j'ai modifié car il s'intéressait aux disques sur ebay US. Dans l'extrait ci-dessous j'ai surligné les champs modifiés : La version originale comprenait un filtrage sur un mot contenu dans le titre, en saisie facultative. Il a fallu ensuite rajouter autre un filtre permettant d'éviter les ouvrages postérieurs à 1799 et le tour était joué. Enfin, on peut diffuser le résultat entre autres sur une page personnalisée Google, sous l'appellation badge (google gadget) comme illustré ci-dessous :

Staff Lists: Top 100 Albums of the 1970s | Features 010: Brian Eno Another Green World [Island; 1975] After taking two strides away from Roxy Music with Here Come the Warm Jets and Taking Tiger Mountain (By Strategy), Eno finally created an album that crystallized his delicately subversive relationship to pop music. As Chris Ott put it in his recent review of the remastered edition of this album, "Eno ripped rock and roll apart, never losing sight of its precepts. This paradox is a very real one, and as listeners, we feel the intensity with which Eno combines his potent pop sensibilities with their very deconstructions. 009: Joy Division Unknown Pleasures [Factory; 1979] One of the best-- and worst-- aspects of Catcher in the Rye is that so many people feel they can relate to Holden Caulfield. Decades after Ian Curtis' suicide, he's frequently discussed as barely more than a caricature of depression and death. 008: Gang of Four Entertainment! Entertainment! 007: Led Zeppelin IV [Atlantic; 1971]

Example: Matching Numeric Ranges with a Regular Expression Since regular expressions deal with text rather than with numbers, matching a number in a given range takes a little extra care. You can't just write [0-255] to match a number between 0 and 255. Though a valid regex, it matches something entirely different. [0-255] is a character class with three elements: the character range 0-2, the character 5 and the character 5 (again). Since regular expressions work with text, a regular expression engine treats 0 as a single character, and 255 as three characters. The regex [0-9] matches single-digit numbers 0 to 9. [1-9][0-9] matches double-digit numbers 10 to 99. Matching the three-digit numbers is a little more complicated, since we need to exclude numbers 256 through 999. 1[0-9][0-9] takes care of 100 to 199. 2[0-4][0-9] matches 200 through 249. As you can see, you need to split up the numeric range in ranges with the same number of digits, and each of those ranges that allow the same variation for each digit.

Regular Expression a free online quick reference by VisiBone I hope you find these excerpts of the VisiBone JavaScript references very useful. See also the JavaScript Card and Foldouts Here is the syntax for a very powerful and very cryptic string pattern matching scheme in the client-side JavaScript of web browsers. You can use it to validate form entry, parse URLs, and many other things. The information here forms a page of the JavaScript Card: and is one of the set of three JavaScript Foldouts: Feedback form below! or VisiBone also makes several printed web color references. Posters & Charts Laminated Cards that match the "VisiBone2" swatch collection in Adobe Illustrator and Photoshop. Plus two varieties of Mouse Pads. And a chart with 1068 non-web-safe colors: Feedback welcome! Thank you, and good luck building!

The Regex Coach - interactive regular expressions Abstract The Regex Coach is a graphical application for Windows which can be used to experiment with (Perl-compatible) regular expressions interactively. It has the following features: It shows whether a regular expression matches a particular target string. It can also show which parts of the target string correspond to captured register groups or to arbitrary parts of the regular expression. Contents Download and installation The Regex Coach together with this documentation can be downloaded from You should use Windows 2000 or Windows XP with all updates and service packs installed. You also must have the Microsoft runtime library msvcr80.dll installed. If you have a previous version (0.8.5 or earlier) of The Regex Coach installed, uninstall it first before you install the new version! Older versions, Linux, FreeBSD, Mac There is no Mac version and I have no plans to release one. License The Regex Coach is Copyright © 2003-2008 Dr. The main panes

iso image - creating a bootable USB from command line on linux Regular Expression Tutorial - Learn How to Use Regular Expressions This tutorial teaches you all you need to know to be able to craft powerful time-saving regular expressions. It starts with the most basic concepts, so that you can follow this tutorial even if you know nothing at all about regular expressions yet. The tutorial doesn't stop there. It also explains how a regular expression engine works on the inside, and alert you at the consequences. What Regular Expressions Are Exactly - Terminology Basically, a regular expression is a pattern describing a certain amount of text. This first example is actually a perfectly valid regex. \b[A-Z0-9._%+-]+@[A-Z0-9.-]+\. With the above regular expression pattern, you can search through a text file to find email addresses, or verify if a given string looks like an email address. Different Regular Expression Engines A regular expression "engine" is a piece of software that can process regular expressions, trying to match the pattern to the given string. Give Regexes a First Try Regex Tutorial Table of Contents

Five Habits for Successful R Regular expressions are hard to write, hard to read, and hard to maintain. Plus, they are often wrong, matching unexpected text and missing valid text. The problem stems from the power and expressiveness of regular expressions. Each metacharacter packs power and nuance, making code impossible to decipher without resorting to mental gymnastics. Most implementations include features that make reading and writing regular expressions easier. This article uses Perl, PHP, and Python in the code examples, but the advice here is applicable to nearly any regex implementation. 1. Most programmers have no problem adding whitespace and indentation to the code surrounding a regular expression. The extended whitespace feature of most regex implementations allows programmers to extend their regular expressions over several lines, with comments at the end of each. The only trick to remember with extended whitespace is that the regex engine ignores whitespace. m/ foo | bar /x "/ foo | bar /x" \(? / \(? 2.