Solved

regular expressions, find text that starts with a word ends with another word but does not contain the last word.

Posted on 2003-10-27
3
1,524 Views
Last Modified: 2007-12-19
Quick one for anyone good with regular expressions.

Ok, say I have a XML file with this layout.

<event  time="23424" name="2325">
      <param name="5645645" data="1231">
      <param name="11231213" data="346">
      <param name="2351324" data="123">
</event>
<event  time="43747" name="2435">
      <param name="32452345" data="5674">
      <param name="2345" data="4567">
      <param name="2435" data="2345">
</event>

I want to use regular expressions to find blocks missing the </event> tag.

I can search and find the blocks from <event...> to the next <event...> but I can't figure out how to only list ones without </event>

Thanks
0
Comment
Question by:waynegs
3 Comments
 
LVL 2

Accepted Solution

by:
ultimatemike earned 250 total points
ID: 9633516
It's kinda tricky to do with regular expressions....Generally XML/HTML is recursive, and it's structure doesn't lend well to RE's.  Here's a perl script that does the job though - It'll print out and event tags that aren't closed:


Just change "xmlfile.xml" to whatever the filename is.


#!perl -w
use strict;


      open XML, "xmlfile.xml";

      $_ = <XML>;


s/<event/#/gm;
s/>\s*</></gm;


my @array = split /#/;


foreach my $element (@array) {
      if  ( $element && $element !~ /<\/event>$/g ) {
            print "FOUND: ";
            print "<event$element\n";
            
      }
};
0
 
LVL 2

Expert Comment

by:scully00000
ID: 9636188
What language are you using? You could use a regex to find the blocks and then search recursively through them for ones missing the </event> tag. Also, what do you want to do with the 'blocks' when you've flagged them? Has a bearing on how the script is written.

Cheers
0
 
LVL 8

Expert Comment

by:fozylet
ID: 9636224
Try your luck at http://www.regexp.org/

A previously answered question there may fit your need.
0

Featured Post

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

I will show you how to create a ASP.NET Captcha control without using any HTTP HANDELRS or what so ever. you can easily plug it into your web pages. For Example a = 2 + 3 (where 2 and 3 are 2 random numbers) Session("Answer") = 5 then we…
This article covers the basics of the Sass, which is a CSS extension language. You will learn about variables, mixins, and nesting.
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question