Search and replace not working

helmerer · 02-21-2011, 05:24 AM

Hi,

at first I would like to thank Kovid Goyal for that great kind of Software!!!

But one issue I've encountered while I tried to remove page numbers from an epub.

The page numbers in the text look like: |10|

My regex for removal is: |[0-9]*|

When I press "Test" in the Wizard it takes a very long time an then the preview dialog shows about 1000000 occurrences. Also no highlights are mark the occurrences.

I've used the regex successfully with notepad++ to remove the page numbers.

Am I doing something wrong or is this a bug?

Best Marco

itimpi · 02-21-2011, 05:26 AM

I thought the vertical bar had special meaning in a regex. Have you tried escaping them as \|

helmerer · 02-21-2011, 05:39 AM

Ok, that does the trick. In other editors I don't have to escape them. Right now it's working.

Thanks for the immediate help :-)

Manichean · 02-21-2011, 05:41 AM

I see two issues with your regex: First, as itimpi said, the vertical bar has special meaning, you'll need to escape it. Second, the asterisk as quantifier means "zero or more occurences", try using the plus quantifier, which means "one or more occurences". Thus, your regex should be

Code:

\|[0-9]+\|

Also note that the regex engine used in Notepad++ is decidedly unsimilar to the Python one used in Calibre. For example, Notepad++ doesn't support matching regexes across multiple lines. Use the test facilities Calibre provides if you want to construct a regex for Calibre.

helmerer · 02-25-2011, 03:48 AM

Ok, I see, I'm not that expert :-) With your help I got i right. Thanks again!!

02-21-2011, 05:24 AM	#1
helmerer Junior Member Posts: 3 Karma: 10 Join Date: Feb 2011 Device: kindle 3	Search and replace not working Hi, at first I would like to thank Kovid Goyal for that great kind of Software!!! But one issue I've encountered while I tried to remove page numbers from an epub. The page numbers in the text look like: \|10\| My regex for removal is: \|[0-9]*\| When I press "Test" in the Wizard it takes a very long time an then the preview dialog shows about 1000000 occurrences. Also no highlights are mark the occurrences. I've used the regex successfully with notepad++ to remove the page numbers. Am I doing something wrong or is this a bug? Best Marco

02-21-2011, 05:41 AM	#4
Manichean Wizard Posts: 3,130 Karma: 91256 Join Date: Feb 2008 Location: Germany Device: Cybook Gen3	I see two issues with your regex: First, as itimpi said, the vertical bar has special meaning, you'll need to escape it. Second, the asterisk as quantifier means "zero or more occurences", try using the plus quantifier, which means "one or more occurences". Thus, your regex should be Code: \\|[0-9]+\\| Also note that the regex engine used in Notepad++ is decidedly unsimilar to the Python one used in Calibre. For example, Notepad++ doesn't support matching regexes across multiple lines. Use the test facilities Calibre provides if you want to construct a regex for Calibre.

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02-21-2011, 05:26 AM	#2
itimpi Wizard Posts: 4,552 Karma: 950151 Join Date: Nov 2008 Device: Sony PRS-950, iphone/ipad (Marvin/iBooks/QuickReader)	I thought the vertical bar had special meaning in a regex. Have you tried escaping them as \\|

02-21-2011, 05:39 AM	#3
helmerer Junior Member Posts: 3 Karma: 10 Join Date: Feb 2011 Device: kindle 3	Ok, that does the trick. In other editors I don't have to escape them. Right now it's working. Thanks for the immediate help :-)

02-25-2011, 03:48 AM	#5
helmerer Junior Member Posts: 3 Karma: 10 Join Date: Feb 2011 Device: kindle 3	Ok, I see, I'm not that expert :-) With your help I got i right. Thanks again!!

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