regex
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Regular expressions (or regex) are a powerful way to traverse large strings in order to find information. They rely on underlying patterns in a string’s structure to work their magic. Unfortunately, simple regular expressions are unable to cope with complex patterns and symbols. To deal with this dilemma, you can use advanced regular expressions . Below, we present an introduction to advanced regular expressions , with eight commonly used concepts and examples. Each example outlines a simple way to match patterns in complex strings.
Crucial Concepts Behind Advanced Regular Expressions | How-To |
A regular expression (regex or regexp for short) is a special text string for describing a search pattern. You can think of regular expressions as wildcards on steroids. You are probably familiar with wildcard notations such as *.txt to find all text files in a file manager.
Regular-Expressions.info - Regex Tutorial, Examples and Referenc
Visual REGEXP : a graphical explorer for your regexps
User get customize the program by adding a file visual_regexp.ini in the same directory as the executable. Here is a sample of such a file showing all the parameters the user can modify. Tcl/Tk script In order to run this program, you need to have Tcl/Tk 8.3.0 (or later) for version 3.0 or Tcl/Tk 8.5a4 for version 3.1 installed (click here to download it). To get the version of an already installed version of Tcl/Tk, run ' wish ' and type ' set tk_version '. User preferences : Some preferences (colors, geometry) can be modified by editing the script and changing the value of the variables (see comment to get variable meaning).
