How to inject chr(10) chr(13) into a string

Mark Weimer has asked for the wisdom of the Perl Monks concerning the following question:

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Re: How to inject chr(10) chr(13) into a string by Tanktalus (Canon) on Jan 29, 2007 at 20:53 UTC
How is it not working? Since you're on Windows, and the files are probably being opened in ascii mode, you probably just need to put in \n, not \r\n - the C runtime library will convert it to \r\n. However, just be aware that [ is a special character that you probably need to escape: `perl -p -i.bak -e 's/\[/\n[/g' f:\test.txt` [download] (I'm not escaping it in the second part because that's a string, not a regular expression, and thus it doesn't have the special meaning anymore.)	[reply] [d/l]
Re: How to inject chr(10) chr(13) into a string by ikegami (Patriarch) on Jan 29, 2007 at 20:56 UTC
With `binmode`, what you have would work. `perl -i.bak -pe "BEGIN { binmode STDOUT } s/(?=\[)/\r\n/g" file` [download] Without `binmode`, `\n` gets transformed to CR+LF, so `\r\n` become CR+CR+LF. `perl -i.bak -pe "s/(?=\[)/\n/g" file` [download] Update: Escaped `[` as noticed by Tanktalus.	[reply] [d/l] [select]
Re: How to inject chr(10) chr(13) into a string by Zaxo (Archbishop) on Jan 30, 2007 at 05:15 UTC
'[' is a regex metacharacter, so perl's not seeing the statement you think you have. I don't think you could run that without some error message being shown. Try `perl -p -i.bak -e"s/\[/\r\n[/g" f:\test.txt` [download] I can't swear I've got the winders command line syntax right, but I think I do. After Compline, Zaxo	[reply] [d/l]
Re: How to inject chr(10) chr(13) into a string by EvanK (Chaplain) on Jan 29, 2007 at 21:58 UTC
You would either want to use binmode on the file being modified, or use `\x0A\x0D` instead of `\r\n`, since `\n` on a windows machine is automagically translated to a carriage-return line-feed. __________ The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it. - Terry Pratchett	[reply] [d/l] [select]