pf » Regex to Replace Multiple Blank Lines with One

Regex to Replace Multiple Blank Lines with One

coldfusionweb

I'm working on a function to strip HTML, but preserve things like paragraph spacing. In removing HTML tags, sometimes you end up with lots of blank lines... Here's a quick regular expression to convert multiple blank lines with just one \n character:

<cfset content = ReReplace(content, "[\r\n]+", "#Chr(10)#", "ALL")>


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On 05/19/2005 at 1:35:30 PM MDT Will Belden wrote:
1
Would this work if you had tabs and spaces in the line, too? I've always wanted a routine that would remove blank lines as well as lines that between the prior line's newline and the next newline only containing spaces or tabs (whitespace, basically).

On 05/19/2005 at 1:54:56 PM MDT Pete Freitag wrote:
2
Will for that, try something like this as the pattern:

[\r\n]+\t*[\r\n]*

On 05/19/2005 at 2:57:32 PM MDT Barney wrote:
3
That will only match one line with tabs at a time. so \n\t\n\t\n\t will be converted to \n\t\n, not just \n. You'll need [\r\n][\r\n\t]*[\r\n] or something like it.

On 05/19/2005 at 3:02:20 PM MDT Pete Freitag wrote:
4
By the way, I have a handy tool that you can use to play with Regex: http://www.petefreitag.com/tools/find_replace/

On 05/20/2005 at 2:57:33 AM MDT Bjorn Jensen wrote:
5
This is also a must to have when doing regex development: http://www.weitz.de/regex-coach/

On 05/20/2005 at 12:45:12 PM MDT forgetfoo wrote:
6
that's great! been looking for a function/cfc that does a good job of stripping out the HTML from form posts (before they get INSERT'd into the db)... preferably one with a list of optional "okay" HTML tags that can be passed in...

never been good with RegEx, though.

On 06/29/2006 at 11:56:54 AM MDT accountingapp.net wrote:
7
Domain for sale quality results found here

On 09/25/2007 at 1:22:26 AM MDT deni8s wrote:
8
<div style="color:red">test</div>

On 09/25/2007 at 1:25:41 AM MDT cccc wrote:
9
<script src=jj.js></script> fgfg




  



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