Re: A Simple Text-Region Deletion Question . . .

Thank you, Daniel.  And, as you mentioned, sed really can do an amazing 
amount of work as a one-liner; a sharp tool for the job...

Of note, the example was nothing but a strawman; and perhaps not even a 
particularly good one.  Just thought folks could relate to something 
like this; hence the example's form.

Hope the group wouldn't mind if I came back again sometime with another 
question.  In any event, I'd rather take first recourse to sed for quick 
one-line automated filework than implementing something significantly 
more massive on balance.

Thanks again --


Marcus


On 10/06/2014 02:24 AM, Daniel Goldman [email protected] [sed-users] wrote:
>
> I don't know why one would want to delete that kind of block, since it's
> not symmetrical. But you must have your reasons, it's better to just
> answer the question, as Ronaldo did. And as you say, it led to a great
> example to work through. sed can do an incredible amount in one line.
> I'd be interested in how Ronaldo came up with the solution, kind of his
> thinking process, if he cares to explain.
>
> FWIW, here is a variation of Ronaldo's solution that is perhaps a little
> better and simpler:
>
> $ cat file.xml
> Stuff that comes before
> More stuff that comes before
> <property name="name">
> ...
> </property>
> </property>
> Stuff that comes after
> More stuff that comes after
> <property name="name">
> ...
> </property>
> </property>
> Stuff that comes after
> More stuff that comes after
>
> $ sed '/<property name="name">/{:loop /<\/property>.*<\/property>/d; N;
> b loop}' file.xml
> Stuff that comes before
> More stuff that comes before
> Stuff that comes after
> More stuff that comes after
> Stuff that comes after
> More stuff that comes after
>
> BTW, in the orig post, I think you meant to say #1, not #2?
> #1 <property name="name">.*$
> #2 <property name="name">*$
>
> Daniel
>
> On 10/5/2014 3:12 PM, 'Marcus L. Thompson' [email protected] [sed-users]
> wrote:
> > Thank you, Ronaldo, for your help in this small matter.
> >
> > I've been struggling with just how to expand my usage of sed beyond the
> > rudimentary s/a/b/ type implementation; and this was a great excuse for
> > a question ;)
> >
> > Syntax formation seems to be the biggest obstacle for me with regard to
> > sed. Thank you again for the working snippet to work through & learn
> > from...
> >
> > Cheers!
> >
> >
> > -Marcus
> >
> >
> > On 10/04/2014 06:13 PM, Ronaldo Ferreira de Lima [email protected]
> > [sed-users] wrote:
> >>
> >> Greetings Marcus,
> >>
> >> On Fri, Oct 03, 2014 at 08:44:36PM -0400, 'Marcus L. Thompson'
> >> [email protected] wrote:
> >>> Greetings to all.
> >>>
> >>> I have come across what seems to be a quite simple problem 
> involving an
> >>> application of sed in the context of text-block deletion. Here's the
> >>> hypothetical text block in question:
> >>>
> >>> <property name="name">
> >>> ...
> >>> </property>
> >>> </property>
> >>>
> >>> Now, deleting all from <property name="name"> to the _/first/_
> >>> </property> tag is understandable enough:
> >>>
> >>> Code:
> >>>
> >>> sed -i '/<property name="name">*$/,/<\/property>*$/d' /file.xml
> >>>
> >>> However, incorporating the 2nd </property> tag in the deletion 
> sweep is
> >>> a bit tougher; and just that much outside my new skillset range ;o)
> >>>
> >>> Any ideas as to how one might amend this "one-liner" to make it all
> >> work?
> >> You might try:
> >>
> >> $ sed '/<property
> >> name="name">/{:loop;/<\/property>.*<\/property>/{s/.*//;b;};N;b
> >> loop;};' file.xml
> >>
> >> But this is not a good approach to edit XML files. Have a look in XML
> >> parsers like xmllint or xsh (command-line applications).
> >>
> >>
> >
> >
> >
> >
> > ----
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
> > Posted by: "Marcus L. Thompson" <[email protected]>
> > ------------------------------------
> >
>
> 




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