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DOS批处理 & 脚本技术（批处理室） » How to replace the content of certain lines in a text file, including special characters and blank lines

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Floor1　mailmail	Posted 2009-05-04 05:36
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For example, I have a text file a.txt under d:\ad\, and the content is as follows: This is a dos a - dos bat. like bat output: ok Now I need to replace the blank lines between line 2, line 3 and line 4 with "join us". How to handle it? Thanks! [ Last edited by mailmail on 2009-5-4 at 23:41 ]

Floor2　yishanju	Posted 2009-05-04 05:39
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What you said is about blank lines or spaces?

Floor3　mailmail	Posted 2009-05-04 07:05
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a DOS batch file. Like a batch file Add the following blank line, all replaced with one sentence

Floor4　mailmail	Posted 2009-05-04 09:06
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I'm sorry, I made a mistake. It should be a direct carriage return and line feed, that is, an empty line with nothing in it, which is equivalent to taking the following text content This is a dos a - dos bat. like bat output: ok Change to the following form This is a dos join us. output: ok

Floor5　mailmail	Posted 2009-05-04 23:41
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I have found relevant examples in the forum and saw how to replace a certain line http://www.cn-dos.net/forum/viewthread.php?tid=35759&fpage=1 But what if I want to replace multiple lines into one line? That is, set string multiple times? Also, what if there are blank lines among multiple lines, how to replace them?

Floor6　yishanju	Posted 2009-05-04 23:51
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It is generally better to handle it with a regular expression find and replace tool. fr -rnnlic:"like bat\r\n\r\n" -t:"join us\." a.txt FR download: http://baiy.cn/utils/fr/index.htm

Floor7　mailmail	Posted 2009-05-04 23:57
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Thanks! This is for learning. Because it's used in the company, external new commands can't be used. If not using this, can we only use loop statements to replace one by one?

Floor8　pkto	Posted 2009-10-22 20:38
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Originally posted by yishanju at 2009-5-4 11:51 PM: It is generally better to use a regular expression find-and-replace tool for processing. fr -rnnlic:"like bat\r\n\r\n" -t:"join us\." a.txt FR download: http://baiy.cn/utils/fr/index.htm This also has issues and cannot handle processing in a loop. If "like bat" is after a blank line, it cannot find the "like bat" field and process it. Also, it seems that Brother Yishanju is very proficient in the regular expressions of fr. Why not open a special section to specifically elaborate on it? I looked at Bai Yang's website, which only has rules but lacks example explanations, making it very confusing for beginners. [ Last edited by pkto on 2009-10-22 at 20:40 ]