I have searched up and down trying to find an answer that will work for me but haven't been able to figure this out. I'm using Yahoo Pipes for this.
Lake Harmony Estates <b>Sleeps: 16</b>
What I need to do is extract the Sleeps: 16 out from the B tag and output just that value and nothing else. I don't suspect this is very hard to do, but given my limited regex knowledge it's giving me troubles. I've tried adapting regex code pertaining to other tags, but just can't seem to get this one to work.
Any help on this would be appreciated. Thanks.
Edit:
Here is my pipe if you wanted to take a look at the regex horrible-ness I've created. The one I'm trying to work though is the item.sleeps, last entry in the 2nd regex
http://pipes.yahoo.com/pipes/pipe.info?_id=567026d850223b0075d80fd3c9bf7e75
This should fit your needs assuming the html isn't ladened with quotes and such. Note that the + will mean that empty <b> tags are ignored. Also, html is not truly passable via regex, so this will only work for basic tags. It should work even if the tag has an ID or a class property, but there are absolutely manners to break this regex.
/<b[^>]*>([^<]+)<\/b>/
I posted this question to Twitter and got a response back that worked for me.
(?s)^.*<b>(.*?)</b>.*
Replace with $1 and have G flag checked.
This solution did everything I needed. I had additional data that I had already excluded in my example that became unnecessary with this regex.
Related
I first wanted to only match the first instance, but soon realized that is not possible. The tool I'm using only uses RegEx so I have no options as well.
Basically I got a text with HTML tags in it and I want to match the first paragraph's tags without the following tags.
For example out of this:
<p>erkfoijwdocndoufhwroguh</p><p>pijgoijkuohuhogiougwtg</p><p>pijgoijkuohuhogiougwtg</p><p>pijgoijkuohuhogiougwtg</p>
I want to match the first <p></p>
and nothing else.
So I figured I could exclude the tags that have a tag right next to them using negative lookahead. As in:
(?!>)(<|<\/)p>
But for some reason this still matches every <p> and </p> tag instead of leaving out those that have another tag before them. Any suggestions?
Edit to add: I only need to match the tags, not the text inside the tags. And lookbehind doesn't work with the tool I'm using. It seems that everything that works here, works also in my tool.
Second edit: I solved my problem, but I'm leaving the question open since the solution wasn't an answer and this seems like an interesting question and I might bump into similiar problem in the future. Basically if someone figures out how I can refer to <p> that doesn't have a > before it but also include the first </p>, I'd like to hear it.
I'm not sure I understood what you are trying to achieve, would this:
^<p>.*?<\/p>
Demo here: https://regex101.com/r/ZXgMPV/1
I'm trying to isolate links from html using a regex and the one I found that is suppose to do it doesn't seem to work.
/^(http?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/
Am I missing something? I'm using Brackets as my text editor
^(?:http|https):\/\/(?:[a-z0-9\-\.]+)(?::[0-9]+)?(?:\/|\/(?:[\w#!:\.\?\+=&%#!\-\/\(\)]+)|\?(?:[\w#!:\.\?\+=&%#!\-\/\(\)]+))?$
Messy, but works.
Also, you might want to look at a similar question: Regex expression for valid website link
Hope this helps :)
It is hard to make it 100% accurate.
A url could also be a IP address for example.
http://ip/
It can contain query strings.
http://www.google.com/?a=1&b=2
It can contain spaces.
http://www.google.com/this is my url/
It depends on what need you have for accuracy.
I'm working with an enterprise CMS and in order to properly create our weekly-updated dropdown menu without republishing our entire site, I have an XML document being created which has a various number of useful XML elements. However, when pulling in a link with the CMS, the generated XML also outputs the link's contents (the entire HTML for the page). Needless to say, with roughly 50 items, the XML file is too big for use on the web (as it stands I think it's over 600KB). The element is <page-content>filler here</page-content>.
What I'm trying to do is use TextWrangler to find and replace all <page-content> tags as well as their containing content.
I've tried a few different regex's, but I can't seem to match the closing tag, so it will just trail on.
Here's what I've tried:
(<page-content>)(.*?)
The above will match up until the next starting <page-content> tag, which is not what I want.
(<page-content>)(.*?)(<\/page-content>)
(<page-content>)(.*?)(<\/page\-content>)
The above finds no matches, even though the below will find the 7 matches it should.
(<content>)(.*?)(<\/content>)
I don't know if there's a special way to deal with hyphens (I'm inexperienced in regular expressions), but if anyone could help me out, it would be greatly appreciated.
Thanks!
EDIT: Before you tell me that Regex isn't meant to parse HTML, I know that, but there seems to be no other way for me to easily find and replace this. There are too many occurences to manually delete it and save the file again every week.
It seems the problem is that your . is not matching newlines that exist between your open and close tags.
An easy solution for this would be to add the s flag in order for your . to match over newlines. TextWrangler appears to support inline modifiers (?s). You could do it like this:
(<page-content>)(?s)(.*?)(<\/page-content>)
More information on modifiers here.
I am trying to write a function which removes websites from a piece of text. I have:
removeWebsites<- function(text){
text = gsub("(http://|https://|www.)[[:alnum:]~!#$%&+-=?,:/;._]*",'',text)
return(text)
}
This handles a large set of the problem, but not a popular one, i.e something of the form xyz.com
I do not wish to add .com at the end of the above regex, as it limits the scope of that regex. However I tried writing some more regexex like:
gsub("[[:alnum:]~!#$%&+-=?,:/;._]*.com",'',testset[10])
This worked, but it also modified email ids of the form abc#xyz.com to abc#. I don't want this, so I modified it to
gsub("*((^#)[[:alnum:]~!#$%&+-=?,:/;._]*).com",'\\1',testset[10])
This left the email ids alone but stopped recognising websites of the form xyz.com
I understand that I need some sort of a set difference here, of the form of what was explained here but I was not able to implement it (mainly because I was not able to completely understand it). Any idea on how I go about solving my problem?
Edit: I tried negative lookaheads:
gsub("[[:alnum:]~!#$%&+-=?,:/;._](?!#)[^(?!.*#)]*.com",'',testset[10])
I got a 'invalid regex' error. I believe a little help in correcting may get this to work...
I can't believe it. There actually is a simple solution to it.
gsub(" ([[:alnum:]~!#$%&+-=?,:/;._]+)((.com)|(.net)|(.org)|(.info))",' ',text)
This works by:
Start with a space.
Put all sorts of things, except an '#' in.
end with a .com/net/org/info/
Please do look into breaking it! I'm sure there will be cases that will break this as well.
your lookarounds look a bit funny to me: you cant look behind inside a character class and why are you looking ahead? A look behind is imho more appropriate.
I think the following expression should work, although i didn't test it:
gsub("*((?<!#)[[:alnum:]~!#$%&+-=?,:/;._]*).com",'\\1',testset[10])
also note that lookbehinds must have a fixed length, so no multipliers are allowed
I'm trying to write some Perl to convert some HTML-based text over to MediaWiki format and hit the following problem: I want to search and replace within a delimited subsection of some text and wondered if anyone knew of a neat way to do it. My input stream is something like:
Please mail support. if you want some help.
and I want to change Please help and Please can some one help me out here to Please%20help and Please%20can%20some%20one%20help%20me%20out%20here respectively, without changing any of the other spaces on the line.
Naturally, I also need to be able to cope with more than one such link on a line so splicing isn't such a good option.
I've taken a good look round Perl tutorial sites (it's not my first language) but didn't come across anything like this as an example. Can anyone advise an elegant way of doing this?
Your task has two parts. Find and replace the mailto URIs - use a HTML parsing module for that. This topic is covered thoroughly on Stack Overflow.
The other part is to canonicalise the URI. The module URI is suitable for this purpose.
use URI::mailto;
my #hrefs = ('mailto:help#myco.com&Subject=Please help&Body=Please can some one help me out here');
print URI::mailto->new($_)->as_string for #hrefs;
__END__
mailto:help#myco.com&Subject=Please%20help&Body=Please%20can%20some%20one%20help%20me%20out%20here
Why dont you just search for the "Body=" tag until the quotes and replace every space with %20.
I would not even use regular expresions for that since I dont find them useful for anything except mass changes where everything on the line is changes.
A simple loop might be the best solution.