How to kill line beginning with specific string

How to kill line beginning with specific string

[brooklynwhite]

I need to figure out how to kill a series of lines in a text file that all
begin with the same string.  The format of the lines is:
2000 001 00        AIR TEMP     354

The second and third expressions in the line change with subsequent lines,
e.g.:

2000 002 01        AIR TEMP     354

Is there a simple way for me to search for and kill all of these lines
without having to repeatedly enter the search mode and type ctrl-k when the
line is found?  I realize this may be a silly question so thanks for your
patience and help.
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Re: How to kill line beginning with specific string

[Dirk-Jan C. Binnema]

>>>>> brooklynwhite  <white805@umn.edu> writes:

    > I need to figure out how to kill a series of lines in a text file that all
    > begin with the same string.  The format of the lines is:
    > 2000 001 00        AIR TEMP     354

    > The second and third expressions in the line change with subsequent lines,
    > e.g.:

    > 2000 002 01        AIR TEMP     354

    > Is there a simple way for me to search for and kill all of these lines
    > without having to repeatedly enter the search mode and type ctrl-k when the
    > line is found?  I realize this may be a silly question so thanks for your
    > patience and help.

M-x flush-lines

Best wishes,
Dirk.

-- 
Dirk-Jan C. Binnema                  Helsinki, Finland
e:djcb@djcbsoftware.nl           w:www.djcbsoftware.nl
pgp: D09C E664 897D 7D39 5047 A178 E96A C7A1 017D DA3C

Re: How to kill line beginning with specific string

[brooklynwhite]

Your help is much appreciated!!!


djcb wrote:
> 
> 
>>>>>> brooklynwhite  <white805@umn.edu> writes:
> 
>     > I need to figure out how to kill a series of lines in a text file
> that all
>     > begin with the same string.  The format of the lines is:
>     > 2000 001 00        AIR TEMP     354
> 
>     > The second and third expressions in the line change with subsequent
> lines,
>     > e.g.:
> 
>     > 2000 002 01        AIR TEMP     354
> 
>     > Is there a simple way for me to search for and kill all of these
> lines
>     > without having to repeatedly enter the search mode and type ctrl-k
> when the
>     > line is found?  I realize this may be a silly question so thanks for
> your
>     > patience and help.
> 
> M-x flush-lines
> 
> Best wishes,
> Dirk.
> 
> -- 
> Dirk-Jan C. Binnema                  Helsinki, Finland
> e:djcb@djcbsoftware.nl           w:www.djcbsoftware.nl
> pgp: D09C E664 897D 7D39 5047 A178 E96A C7A1 017D DA3C
> 
> 
> 
> 

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Re: How to kill line beginning with specific string

[Peter Dyballa]

Am 18.11.2009 um 19:51 schrieb brooklynwhite:

> Is there a simple way for me to search for and kill all of these lines
> without having to repeatedly enter the search mode and type ctrl-k  
> when the
> line is found?


You can check with C-M-s ^2000 .*C-qC-j – it will high-light the  
matching lines. Once you're content you can use replace-regexp to  
replace all that matches the regular expression with nothing.

--
Greetings

   Pete

"Indentation?! I will show you how to indent when I indent your skull!"

Re: How to kill line beginning with specific string

[Miles Bader]

Peter Dyballa <Peter_Dyballa@Web.DE> writes:
>> Is there a simple way for me to search for and kill all of these lines
>> without having to repeatedly enter the search mode and type ctrl-k 
>> when the
>> line is found?
>
> You can check with C-M-s ^2000 .*C-qC-j – it will high-light the
> matching lines. Once you're content you can use replace-regexp to
> replace all that matches the regular expression with nothing.

Perhaps more easily, use the `flush-lines' command, and give it a regexp
of "^" + your string:

E.g., to kill lines beginning with "my prefix":

   M-x flush-lines RET ^my prefix RET

[Note that flush-lines operates on all lines _following point_, so you
might want to move to the beginning of the buffer first.]

-Miles

-- 
Cynic, n. A blackguard whose faulty vision sees things as they are, not as
they ought to be. Hence the custom among the Scythians of plucking out a
cynic's eyes to improve his vision.

Re: How to kill line beginning with specific string

[Giorgos Keramidas]

On Wed, 18 Nov 2009 10:51:29 -0800 (PST), brooklynwhite <white805@umn.edu> wrote:
> I need to figure out how to kill a series of lines in a text file that all
> begin with the same string.  The format of the lines is:
>
> 2000 001 00        AIR TEMP     354
>
> The second and third expressions in the line change with subsequent
> lines, e.g.:
>
> 2000 002 01        AIR TEMP     354
>
> Is there a simple way for me to search for and kill all of these lines
> without having to repeatedly enter the search mode and type ctrl-k
> when the line is found?  I realize this may be a silly question so
> thanks for your patience and help.

You can use `M-x flush-lines RET'.  Note that the `flush-lines' argument
is a regular expression, but it should work fine for simple string
matching too.