Smart Quotes for Smart People info - Regex Tutorial, Examples and Reference - Regexp Patterns Origami d'oiseaux et d'autres animaux volants Voici des origami d'oiseaux et d'autres animaux volants. Cliquez sur une image pour accéder à la description des pliages de l'origami (diagramme). Une grande partie des origamis ont été conçus par Fumiaki Shingu. Using Regular Expressions in Ruby (Part 1 of 3) | Blue Box This is the first installation in our three part series on regular expressions. Be sure to check out Part II and Part III. Nell Shamrell works as a Software Development Engineer for Blue Box. She also sits on the advisory board for the University of Washington Certificate in Ruby Programming. She specializes in Ruby, Rails, and Test Driven Development. Introduction I’ll be honest, the first time I saw a regular expression I was intimidated. I have overcome this fear. Regular Expressions A regular expression is just a pattern. Regular Expressions in Ruby Ruby lets us take regular expressions to further heights. As of Ruby 1.9, Ruby uses the Oniguruma regular expressions library. I recently found out Ruby 2.0 use a different regular expressions library, Onigmo. Basic Matching In most of my Ruby regular expressions, I use the =~ operator. /force/ =~ "Use the force" On the left side I have a regular expression, which in this case is the literal word force. "Use the force" =~ /force/ /dark side/ !
la little gallery Essential Guide To Regular Expressions: Tools and Tutorials Advertisement Regular expressions are an essential part of any programmer’s toolkit. They can be very handy when you need to identify, replace or modify text, words, patterns or characters. In a nutshell: regular expressions (regex) are like a Swiss army knife for modifying strings of just about anything. Need to make your site URLs look pretty? Regular expressions are something that you’ll come across at least once in your development cycle, whether you’re just trying to modify an .htaccess file to make clean URLs, or something much more advanced like filtering RSS feeds or other data. Getting Started Just dipping your feet into regex? The Absolute Bare-Minimum Every Programmer Should Know About Regular Expressions1A simple and direct article that outline some of the main “characters” in regular expressions. Demystifying Regular Expressions853In this article a simple usage of regular expressions is described. Regular Expressions Cheat Sheet11A one-page reference sheet. Regex Tools
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Ruby Regular Expressions A regular expression is a special sequence of characters that helps you match or find other strings or sets of strings using a specialized syntax held in a pattern. A regular expression literal is a pattern between slashes or between arbitrary delimiters followed by %r as follows: Syntax: /pattern//pattern/im # option can be specified%r! Example: #! This will produce the following result: Line1 contains Cats Regular-expression modifiers: Regular expression literals may include an optional modifier to control various aspects of matching. Like string literals delimited with %Q, Ruby allows you to begin your regular expressions with %r followed by a delimiter of your choice. # Following matches a single slash character, no escape required%r|/| # Flag characters are allowed with this syntax, too%r[</(.*)>]i Regular-expression patterns: Except for control characters, (+ ? Following table lists the regular expression syntax that is available in Ruby. Regular-expression Examples: Literal characters: #!
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Ruby for Newbies: Regular Expressions Ruby is a one of the most popular languages used on the web. We’ve started a new Session here on Nettuts+ that will introduce you to Ruby, as well as the great frameworks and tools that go along with Ruby development. In this lesson, we’ll look at using regular expression in Ruby. If you’re familiar with regular expressions, you’ll be glad to know that most of the syntax for writing the actual regular expressions is very similar to what you know from PHP, JavaScript, or [your language here]. If you’re not familiar with regular expressions, you’ll want to check out our Regex tutorials here on Nettuts+ to get up to speed. Just like everything else in Ruby, regular expressions are regular objects: they’re instances of the Regexp class. To start, the simplest way to use a regexp is to apply it to a string and see if there’s a match. Both of these examples match, and so we’re going to get a MatchData instance back (we’ll look at MatchData objects soon). So, let’s execute this: subsub!
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Ruby Regular Expressions: Ruby Study Notes - Best Ruby Guide, Ruby Tutorial Regular expressions, though cryptic, is a powerful tool for working with text. Ruby has this feature built-in. It's used for pattern-matching and text processing. Many people find regular expressions difficult to use, difficult to read, un-maintainable, and ultimately counterproductive. A regular expression is simply a way of specifying a pattern of characters to be matched in a string. You could write a pattern that matches a string containing the text Pune or the text Ruby using the following regular expression: The forward slashes delimit the pattern, which consists of the two things we are matching, separated by a pipe character (|). The simplest way to find out whether there's a match between a pattern and a string is with the match method. m1 = /Ruby/.match("The future is Ruby") puts m1.class m2 = "The future is Ruby" =~ /Ruby/ puts m2 m1 = /Ruby/.match("The future is Ruby") puts m1.class # it returns MatchData m2 = "The future is Ruby" =~ /Ruby/ puts m2 # it returns 14
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Regex Runner: a game to teach regular expressions to kids Last December, I wrote a column suggesting that games would be a great way to teach kids Regular Expressions, a part of the world of programming that surfaces in tons of non-expert applications, like word processors. Now, Sal writes, "For my Computer Games course project, I used your article regarding reg-exp to try to make an educational game, there's already SO many academic papers and books on this area it's overwhelming. Rather than read up and design something based on researched principles, I thought instead about what game I was playing most on my phone and I decided those "always running" type games (Temple Run/Canabalt etc) are super cool. Regex Runner