Regex examples - Page 31

amrac · 01-02-2015, 05:04 PM

This will work:
\w+ [\w+ ,]{1,}

You may want to add all punctuation characters or any character a sentence may include. You can change this to:
\w+ [\w+ ,\.\?\-]{1,}

DiapDealer · 01-02-2015, 05:56 PM

Whose question are you answering?

1v4n0 · 01-12-2015, 10:34 AM

How about a regex that finds everything that has the structure of

<AAAwhatever></AAA>

i.e. all empty html elements.

Or, even better, all elements that either are empty or that contain just a space.

EDIT Looks like this one is working, though I'm not entirely sure why.

Code:

<[^/>]+>[ \n\r\t]*</[^>]+>

eschwartz · 01-12-2015, 10:55 AM

Code:

<(\w+)( [^<>]+)?>(\s|&nbsp;)*</\1>

mzmm · 01-12-2015, 11:06 AM

Quote:

Originally Posted by 1v4n0

How about a regex that finds everything that has the structure of

<AAAwhatever></AAA>

i.e. all empty html elements.

Or, even better, all elements that either are empty or that contain just a space.

i use something like this to catch paragraph tags, either empty or containing only whitespace. it also catches nested tags, so things like

Code:

(?s)<p[^>]*?>\s*?(?:<\w[^>/]*?>)*?\s*?(?:&nbsp;|*|<br(?:\s|\s/|/)?>)*?\s*?(?:</\w[^>/]*?>)*?\s*?</p>

Quote:

Originally Posted by 1v4n0

EDIT Looks like this one is working, though I'm not entirely sure why.

Code:

<[^/>]+>[ \n\r\t]*</[^>]+>

because it's looking for

Code:

<[^/>]+>

an opening and closing bracket containing one or more of anything except closing brackets or forward slashes

Code:

[ \n\r\t]*

followed by none or more spaces, newlines or tabs

Code:

</[^>]+>

followed by an opening and closing bracket containing one or more of anything except closing brackets or forward slashes

JSWolf · 01-12-2015, 11:09 AM

Quote:

Originally Posted by 1v4n0

How about a regex that finds everything that has the structure of

<AAAwhatever></AAA>

i.e. all empty html elements.

Or, even better, all elements that either are empty or that contain just a space.

EDIT Looks like this one is working, though I'm not entirely sure why.

Code:

<[^/>]+>[ \n\r\t]*</[^>]+>

Don't use this. It won't work. Sorry, but you cannot guarantee that it won't mess something up.

Take a look at the following line...

This is some text.THIS IS MORE TEXT. This is yet more text. And finally the last bit of text.

Can you use regex to get rid of the empty span without messing up the span that actually does something? I don't see how you can.

eschwartz · 01-12-2015, 11:11 AM

Didn't notice you found a solution.

Note that mine should find html entity nbsp's as well.

Additionally, it makes sense to ensure the two tags match, which I have done.

eschwartz · 01-12-2015, 11:14 AM

Quote:

Originally Posted by JSWolf

Don't use this. It won't work. Sorry, but you cannot guarantee that it won't mess something up.

Take a look at the following line...

This is some text.THIS IS MORE TEXT. This is yet more text. And finally the last bit of text.

Can you use regex to get rid of the empty span without messing up the span that actually does something? I don't see how you can.

The reason it won't do anything... is because there is no empty tag set, span or otherwise.

1v4n0 · 01-12-2015, 12:58 PM

Quote:

Originally Posted by mzmm

Thanks for the explanation. Your code doesn't work though.

mzmm · 01-12-2015, 01:17 PM

had some trouble pasting this in, but anyway, it's fixed

Code:

(?s)<p[^>]*?>\s*?(?:<\w[^>/]*?>)*?\s*?(?:&nbsp;|<br(?:\s|\s/|/)?>)*?\s*?(?:</\w[^>/]*?>)*?\s*?</p>

1v4n0 · 01-12-2015, 02:25 PM

hmm still doesn't work. Only finds the tags with   inside.

eschwartz · 01-12-2015, 03:44 PM

Use mine. It will remove matched tag pairs with no content or containing only a space or html entity space.

regex is not a programming language. The appropriate way to remove multiple nested sets is by repeating the Replace All until there are none left.

JSWolf · 01-12-2015, 04:06 PM

Quote:

Originally Posted by eschwartz

The reason it won't do anything... is because there is no empty tag set, span or otherwise.

There is an empty span set. It's the span that does nothing. The other span does something so it's not empty. But regex will not recognize which is the closing for empty span.

eschwartz · 01-12-2015, 04:11 PM

Quote:

Originally Posted by JSWolf

There is an empty span set. It's the span that does nothing. The other span does something so it's not empty. But regex will not recognize which is the closing for empty span.

Perhaps the fundamental point of this particular question has escaped you. The OP is asking for something to find tags which do not enclose rendered text.

It is also worth pointing out that the span tag *can* be styled without attributes. Which would be the only reason to have an attributeless span tag anyway.

mzmm · 01-23-2015, 12:24 PM

Quote:

Originally Posted by 1v4n0

Thanks for the explanation. Your code doesn't work though.

works for me in Sigil

it matches


 
  
  
...

but not when the tags are unevenly distributed, as in
 

anyway. grave-digging threads here...

01-02-2015, 05:04 PM	#451
amrac Junior Member Posts: 2 Karma: 75742 Join Date: Jan 2015 Location: Lees, United Kingdom Device: none	This will work: <span class="italics">\w+ [\w+ ,]{1,}</span> You may want to add all punctuation characters or any character a sentence may include. You can change this to: <span class="italics">\w+ [\w+ ,\.\?\-]{1,}</span>

01-12-2015, 10:34 AM	#453
1v4n0 Groupie Posts: 173 Karma: 40000 Join Date: Oct 2013 Device: kindle	Removing empty html elements How about a regex that finds everything that has the structure of <AAAwhatever></AAA> i.e. all empty html elements. Or, even better, all elements that either are empty or that contain just a space. EDIT Looks like this one is working, though I'm not entirely sure why. Code: <[^/>]+>[ \n\r\t]</[^>]+> Last edited by 1v4n0; 01-12-2015 at 10:51 AM.*

01-12-2015, 10:55 AM	#454
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Code: <(\w+)( [^<>]+)?>(\s\| )</\1> Last edited by eschwartz; 01-12-2015 at 11:00 AM.*

01-12-2015, 11:11 AM	#457
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Didn't notice you found a solution. Note that mine should find html entity nbsp's as well. Additionally, it makes sense to ensure the two tags match, which I have done. Last edited by eschwartz; 01-12-2015 at 11:16 AM.

01-12-2015, 01:17 PM	#460
mzmm Groupie Posts: 171 Karma: 86271 Join Date: Feb 2012 Device: iPad, Kindle Touch, Sony PRS-T1	had some trouble pasting this in, but anyway, it's fixed Code: (?s)<p[^>]?>\s?(?:<\w[^>/]?>)?\s?(?: \|<br(?:\s\|\s/\|/)?>)?\s?(?:</\w[^>/]?>)?\s?</p> Last edited by mzmm; 01-12-2015 at 01:21 PM.

01-02-2015, 05:56 PM	#452
DiapDealer Grand Sorcerer Posts: 28,880 Karma: 207000000 Join Date: Jan 2010 Device: Nexus 7, Kindle Fire HD	Whose question are you answering?

01-12-2015, 02:25 PM	#461
1v4n0 Groupie Posts: 173 Karma: 40000 Join Date: Oct 2013 Device: kindle	hmm still doesn't work. Only finds the tags with   inside. Last edited by 1v4n0; 01-12-2015 at 03:21 PM.

01-12-2015, 03:44 PM	#462
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Use mine. It will remove matched tag pairs with no content or containing only a space or html entity space. regex is not a programming language. The appropriate way to remove multiple nested sets is by repeating the Replace All until there are none left.

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