How can I use regular expressions to search for a substring within
another substring? For example, if I have the string:
"This is * some text <button id="123">Some * text</button>"
and I only wanted to find the * character(s) that appear within the
<button> tags, how could I do that using reg ex?
Thanks in advance for the help. 3 2307 co*********@gma il.com wrote: How can I use regular expressions to search for a substring within another substring? For example, if I have the string:
"This is * some text <button id="123">Some * text</button>"
and I only wanted to find the * character(s) that appear within the <button> tags, how could I do that using reg ex?
You'll need to write a regular expression that uses balanced matching,
to make sure that any given * is actually within the scope defined by
the button tag. Have a look at this blog article for information on
balanced matching: http://blogs.msdn.com/bclteam/archiv...15/396452.aspx
Oliver Sturm
--
omnibus ex nihilo ducendis sufficit unum
Spaces inserted to prevent google email destruction:
MSN oliver @ sturmnet.org Jabber sturm @ amessage.de
ICQ 27142619 http://www.sturmnet.org/blog
Oliver Sturm wrote: You'll need to write a regular expression that uses balanced matching, to make sure that any given * is actually within the scope defined by the button tag.
Or, thinking about it, you don't want to do that at all, because the
button tag can't be nested at all. In that case, try something like this:
<button[^>]*>(.*?(?<asteri sk>\*).*?)*</button>
Oliver Sturm
--
omnibus ex nihilo ducendis sufficit unum
Spaces inserted to prevent google email destruction:
MSN oliver @ sturmnet.org Jabber sturm @ amessage.de
ICQ 27142619 http://www.sturmnet.org/blog co*********@gma il.com writes: How can I use regular expressions to search for a substring within another substring? For example, if I have the string:
"This is * some text <button id="123">Some * text</button>"
and I only wanted to find the * character(s) that appear within the <button> tags, how could I do that using reg ex?
Thanks in advance for the help.
Are you trying to parse HTML, SGML, XML, or some other markup language
using regular expressions? If so, the Perl FAQ will tell you why that's
a bad idea. Use a parser for parsing.
Also - why the cross-post? Regular expressions are not generic - so an
answer you get from the Perl group won't necessarily apply to a regex
engine that's written in C#, and vice versa. If you have a question about
C# regexes, ask it in the C# group.
sherm--
--
Cocoa programming in Perl: http://camelbones.sourceforge.net
Hire me! My resume: http://www.dot-app.org This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Day Of The Eagle |
last post by:
Jeff_Relf wrote:
> ...yet you don't even know what RegEx is.
>
I'm looking at the source code for mono's Regex implementation right
now. You can download that source here ( use the class libraries
download ).
http://www.mono-project.com/Downloads
|
by: Timmy |
last post by:
I'm working on a simple click-through image gallery and I have images with
captions in two arrays like this:
var current_value="0";
var images = new Array
("photo01.jpg",
"photo02.jpg",
"photo02.jpg");
|
by: alphatan |
last post by:
Is there relative source or document for this purpose?
I've searched the index of "Mastering Regular Expression", but cannot
get the useful information for C.
Thanks in advanced.
--
Learning is to improve, but not to prove.
|
by: melanieab |
last post by:
Hi,
I'm trying to use DataView to find the row number in the datatable that
contains "Rich" in it so that I can highlight it. It works fine when I enter
the entire string (i.e. Richard), but I can't seem to make a search for
"Rich" recognize that Richard is also what I want.
The problem seems to be here:
DataView dv = tCat.DefaultView;
Regex reg = new Regex(@"^Rich");
|
by: bonit99 |
last post by:
hello!
I have a question on how I can replace all occurences of one special
character within a matching string?
for example string:
key = 'som#ething#something' OR anotherkey <= 'anot#her' AND somekey =
'some#'
| |
by: Mark Chambers |
last post by:
Hi there,
I'm seeking opinions on the use of regular expression searching. Is there
general consensus on whether it's now a best practice to rely on this rather
than rolling your own (string) pattern search functions. Where performance
is an issue you can alway write your own specialized routine of course.
However, for the occasional pattern search where performance isn't an issue,
would most seasoned .NET developers rely on "Regex" and...
|
by: Flomo Togba Kwele |
last post by:
I am having difficulty writing a Regex constructor.
A line has a quote(") at its beginning and its end. I need to strip both characters off. If the
line looks like "1", I need the result to be 1.
If it were sed, I could just do s/^"// and s/"$//, but I'm confused with the quote escape
characters. Also, can I do both replacements at once?
I tried:
|
by: jonnyboy6969 |
last post by:
Hi All
Really hoping someone can help me out here with my deficient regex skills :)
I have a function which takes a string of HTML and replaces a term (word or phrase) with a link. The pupose is that I seek out terms which are in a glossary on our site, and automatically link to this definition. Its slightly complex becase certain elements have to be ignored, for exampleI dont want to add links within existing links, or for example link...
|
by: =?Utf-8?B?anAybXNmdA==?= |
last post by:
Two part question:
1. Is Regex more efficient than manually comparing values using Substring?
2. I've never created a Regex expression. How would I use regex to do the
equivalent of what I have coded using Substrings below?
string s = TextBox1.Text.ToUpper();
string ch = s.Substring(0, 1); // read first character
if ((ch == "B") || (ch == "C") || (ch == "X")) {
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
| |
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
| |
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| |