Date: Thu, 4 Apr 2002 03:44:34 +0200 From: Erik Trulsson <ertr1013@student.uu.se> To: Peter Leftwich <Hostmaster@Video2Video.Com> Cc: Warren Block <wblock@wonkity.com>, ann kok <annkok2001@yahoo.com>, FreeBSD Questions <FreeBSD-Questions@FreeBSD.Org> Subject: Re: special charaters (return key) Message-ID: <20020404014434.GA71781@student.uu.se> In-Reply-To: <20020403203320.X70185-100000@earl-grey.cloud9.net> References: <Pine.BSF.4.21.0204031813590.76705-100000@wonkity.com> <20020403203320.X70185-100000@earl-grey.cloud9.net>
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On Wed, Apr 03, 2002 at 08:34:57PM -0500, Peter Leftwich wrote:
> On Wed, 3 Apr 2002, Warren Block wrote:
> > On Wed, 3 Apr 2002, ann kok wrote:
> > > how do type the special charater? ^M (return key) I want to remove it on the file
> > > sed 's/^M//g' crt1.txt
> > Seems like last time I wanted to do this, the BSD sed didn't understand that a \r should be a return. Perl does, though:
> > perl -pi -e 's/\r//g' crt1.txt
> > -Warren Block * Rapid City, South Dakota USA
>
> This was going to be part of my suggested rememdy (i.e. to use perl) but it
> seemed too complex. The manpage for "perl" doesn't mention -pi nor does it
> mention -e; Could you explain what this command does? I think there should
> be a simple command to change a file into one long line :)
'man perl' does not document the switches. 'man perlrun' does.
Briefly:
-e Next argument is the perl program to run.
-p Iterate over all the lines in all the files given as arguments.
Print the result of each step to stdout.
-i Do the editing inline instead of sending it to stdout.
(One can optionally create a backup file.)
So what the program above does is: For each line in each file specified
(crt1.txt above), replace each \r with an empty string, (i.e. remove it.)
To change a file into one long lime you can use the above program. Just
change \r into \n.
--
<Insert your favourite quote here.>
Erik Trulsson
ertr1013@student.uu.se
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