Re: do shell script- sed conundrum
Re: do shell script- sed conundrum
- Subject: Re: do shell script- sed conundrum
- From: Christopher Nebel <email@hidden>
- Date: Fri, 17 Feb 2006 12:44:31 -0800
That works (aside from the -p/-n slip that you caught already), but
your reasoning about \B is incorrect. \B is defined as a zero-width
assertion -- it never matches any characters, only the boundary
itself. This is sufficient:
perl -pe 's/\BTitle:/\nTitle:/'
Or, if you prefer:
perl -pe 's/\B(Title:)/\n$1/'
--Chris Nebel
AppleScript and Automator Engineering
On Feb 17, 2006, at 10:04 AM, Mark J. Reed wrote:
Uhm, so why use sed? Just use perl. perl -ne 's/.../.../' filename
does what sed 's/.../.../' filename does.
However, your regex looks wrong. s/\BTitle:/Title:\r" will turn
"Title: King KongTitle: Godzilla" into
"Title: King KonTitle:
Godzilla".
You want to 1. keep whatever the \B matches and 2. put the newline
*before* the word Title.
perl -ne 's/(\B)(Title)/$1\n$2/' title.txt
On 2/17/06, Eric Geoffroy <email@hidden> wrote:
This is a tiny part of a sed script that I'm calling from 'do shell
script' This is the misbehaving part.
SOURCE
Title: King KongTitle: Godzilla
Title: Mothra
DESIRED RESULT
Title: King Kong
Title: Godzilla
Title: Mothra
I worked out the regex to match '\BTitle: '
to negate the word boundary. In sed though, the boundary is \<
but I can't figure out how to negate that.
In my make-believe world, this would work-
sed 's/\BTitle:/Title:\r/' title.txt
I also tried ^\<(Title)
In the real world, the \B is invalid for sed, and the shell in OSX is
not handling the \r.
thx
- Eric
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--
Mark J. Reed <email@hidden>
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