Comments on: Mimicking Atomic Groups http://blog.stevenlevithan.com/archives/mimic-atomic-groups A JavaScript and regular expression centric blog Thu, 09 Feb 2012 10:18:35 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Mark McDonnell http://blog.stevenlevithan.com/archives/mimic-atomic-groups/comment-page-1#comment-53226 Mark McDonnell Wed, 26 May 2010 09:54:49 +0000 http://blog.stevenlevithan.com/?p=15#comment-53226 OMG what an idiot I am! :-$ sorry about that :) Works like a charm now! Thanks again for your help clearing that up for me. OMG what an idiot I am! :-$ sorry about that :)

Works like a charm now!

Thanks again for your help clearing that up for me.

]]> By: Steven Levithan http://blog.stevenlevithan.com/archives/mimic-atomic-groups/comment-page-1#comment-53224 Steven Levithan Wed, 26 May 2010 08:18:09 +0000 http://blog.stevenlevithan.com/?p=15#comment-53224 Dude, there's still a dot in your updated regex (near the end). ;-) In any case, I can tell you that according to the ES3/5 spec the method described here should work 100% reliably (and I've never had any problem with it in any browser or in RegexBuddy). If you find a bug in e.g. RegexBuddy's JavaScript-flavor regex emulation (which I don't think exists in this case), it would probably be best to report it on the RegexBuddy forums. Dude, there’s still a dot in your updated regex (near the end). ;-)

In any case, I can tell you that according to the ES3/5 spec the method described here should work 100% reliably (and I’ve never had any problem with it in any browser or in RegexBuddy). If you find a bug in e.g. RegexBuddy’s JavaScript-flavor regex emulation (which I don’t think exists in this case), it would probably be best to report it on the RegexBuddy forums.

]]> By: Mark McDonnell http://blog.stevenlevithan.com/archives/mimic-atomic-groups/comment-page-1#comment-53221 Mark McDonnell Wed, 26 May 2010 07:54:33 +0000 http://blog.stevenlevithan.com/?p=15#comment-53221 Hi Steve, Because I wanted to check out how to mimic atomic groups I changed the regex flavour to JavaScript and so now I'm unable to select "Dot matches new line". I then tried changing the dot to [\S\s] but that also didn't work? <html>(?=([\S\s]*?<head>))\1(?=([\S\s]*?<title>))\2(?=([\S\s]*?</title>))\3(?=([\S\s]*?</head>))\4(?=([\S\s]*?<body[^>]*>))\5(?=([\S\s]*?</body>))\6.*?</html> Hi Steve,

Because I wanted to check out how to mimic atomic groups I changed the regex flavour to JavaScript and so now I’m unable to select “Dot matches new line”.

I then tried changing the dot to [\S\s] but that also didn’t work?

<html>(?=([\S\s]*?<head>))\1(?=([\S\s]*?<title>))\2(?=([\S\s]*?</title>))\3(?=([\S\s]*?</head>))\4(?=([\S\s]*?<body[^>]*>))\5(?=([\S\s]*?</body>))\6.*?</html>

]]> By: Steven Levithan http://blog.stevenlevithan.com/archives/mimic-atomic-groups/comment-page-1#comment-53182 Steven Levithan Tue, 25 May 2010 14:31:17 +0000 http://blog.stevenlevithan.com/?p=15#comment-53182 @Mark McDonnell, your modified regex works fine for me in RegexBuddy. Did you enable the "Dot matches newline" option? (When you use RegexBuddy's library it will apply appropriate options automatically for that specific regex.) @Mark McDonnell, your modified regex works fine for me in RegexBuddy. Did you enable the “Dot matches newline” option? (When you use RegexBuddy’s library it will apply appropriate options automatically for that specific regex.)

]]> By: Mark McDonnell http://blog.stevenlevithan.com/archives/mimic-atomic-groups/comment-page-1#comment-53180 Mark McDonnell Tue, 25 May 2010 14:14:15 +0000 http://blog.stevenlevithan.com/?p=15#comment-53180 Hi, Just tried this via RegexBuddy and couldn't get it to match. I took an existing regex that is part of the RegexBuddy library "HTML file (atomic)" which looks like this... <html>(?>.*?<head>)(?>.*?<title>)(?>.*?</title>)(?>.*?</head>)(?>.*?<body[^>]*>)(?>.*?</body>).*?</html> ...and then modified it to use the technique you discuss here but it doesn't work... <html>(?=(.*?<head>))\1(?=(.*?<title>))\2(?=(.*?</title>))\3(?=(.*?</head>))\4(?=(.*?<body[^>]*>))\5(?=(.*?</body>))\6.*?</html> Any help appreciated. M. Hi,

Just tried this via RegexBuddy and couldn’t get it to match.

I took an existing regex that is part of the RegexBuddy library “HTML file (atomic)” which looks like this…

<html>(?>.*?<head>)(?>.*?<title>)(?>.*?</title>)(?>.*?</head>)(?>.*?<body[^>]*>)(?>.*?</body>).*?</html>

…and then modified it to use the technique you discuss here but it doesn’t work…

<html>(?=(.*?<head>))\1(?=(.*?<title>))\2(?=(.*?</title>))\3(?=(.*?</head>))\4(?=(.*?<body[^>]*>))\5(?=(.*?</body>))\6.*?</html>

Any help appreciated.

M.

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