regexp help

regexp help

[gokhalen]

Hi,

I needed to replace lines matching the following pattern

"hello      123456123456"

with

"hello      123456 123456"

I used

M-x replace-regexp RET hello      ...... RET \&                      /
* NOTE: a white space follows the \&  */

To do this.

I was wondering how I would do this with the \d construct. That is how
would I do this along the lines of

M-x replace-regexp RET hello     \(......\)\1 RET hello      \1    /*
NOTE: a white space follows the \1    */


Thanks,

  -Nachiket.

Re: regexp help

[HS]

On 2 fev, 20:20, gokha...@gmail.com wrote:
> Hi,
>
> I needed to replace lines matching the following pattern
>
> "hello      123456123456"
>
> with
>
> "hello      123456 123456"
>
> I used
>
> M-x replace-regexp RET hello      ...... RET \&                      /
> * NOTE: a white space follows the \&  */
>
> To do this.
>
> I was wondering how I would do this with the \d construct. That is how
> would I do this along the lines of
>
> M-x replace-regexp RET hello     \(......\)\1 RET hello      \1    /*
> NOTE: a white space follows the \1    */
>
> Thanks,
>
>   -Nachiket.

There's no \d construct....
Can't you record a keyboard macro ? it might be easier!

Re: regexp help

[Matthew Flaschen]

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gokhalen@gmail.com wrote:
> Hi,
> 
> I needed to replace lines matching the following pattern
> 
> "hello      123456123456"
> 
> with
> 
> "hello      123456 123456"
> 
> I used
> 
> M-x replace-regexp RET hello      ...... RET \&                      /
> * NOTE: a white space follows the \&  */
> 
> To do this.
> 
> I was wondering how I would do this with the \d construct. That is how
> would I do this along the lines of

I'm not sure, but I think you want this:

M-x replace-regexp
\([0-9][0-9][0-9][0-9][0-9][0-9]\)\([0-9][0-9][0-9][0-9][0-9][0-9]\) RET
    \1 \2 RET

There may be some way to avoid repeating the [0-9] but I couldn't figure
that out.

Matthew Flaschen


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Re: regexp help

[Matthew Flaschen]

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Matthew Flaschen wrote:
> gokhalen@gmail.com wrote:
>> Hi,
>>
>> I needed to replace lines matching the following pattern
>>
>> "hello      123456123456"
>>
>> with
>>
>> "hello      123456 123456"
>>
>> I used
>>
>> M-x replace-regexp RET hello      ...... RET \&                      /
>> * NOTE: a white space follows the \&  */
>>
>> To do this.
>>
>> I was wondering how I would do this with the \d construct. That is how
>> would I do this along the lines of
> 
> I'm not sure, but I think you want this:
> 
> M-x replace-regexp
> \([0-9][0-9][0-9][0-9][0-9][0-9]\)\([0-9][0-9][0-9][0-9][0-9][0-9]\) RET
>     \1 \2 RET
> 
> There may be some way to avoid repeating the [0-9] but I couldn't figure
> that out.

Never mind.  I just forgot the escape.  The best way (I think) is:

\([0-9]\{6\}\)\([0-9]\{6\}\) RET \1 \2 RET

Matthew Flaschen


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Re: regexp help

[M G Berberich]

On Fri, 02 Feb 2007, Matthew Flaschen <matthew.flaschen@gatech.edu> wrote:

> There may be some way to avoid repeating the [0-9] but I couldn't
> figure that out.

Regular Expressions can't count.

-- 
„Des is völlig wurscht, was heut beschlos- | M G Berberich
 sen wird: I bin sowieso dagegn!“          | berberic@fmi.uni-passau.de
(SPD-Stadtrat Kurt Schindler; Regensburg)  | www.fmi.uni-passau.de/~berberic

Re: regexp help

[Pascal Bourguignon]

Matthew Flaschen <matthew.flaschen@gatech.edu> writes:

> gokhalen@gmail.com wrote:
>> Hi,
>> 
>> I needed to replace lines matching the following pattern
>> 
>> "hello      123456123456"
>> 
>> with
>> 
>> "hello      123456 123456"
>> 
>> I used
>> 
>> M-x replace-regexp RET hello      ...... RET \&                      /
>> * NOTE: a white space follows the \&  */
>> 
>> To do this.
>> 
>> I was wondering how I would do this with the \d construct. That is how
>> would I do this along the lines of
>
> I'm not sure, but I think you want this:
>
> M-x replace-regexp
> \([0-9][0-9][0-9][0-9][0-9][0-9]\)\([0-9][0-9][0-9][0-9][0-9][0-9]\) RET
>     \1 \2 RET
>
> There may be some way to avoid repeating the [0-9] but I couldn't figure
> that out.

  \([0-9]\{6\}\)\([0-9]\{6\}\)

-- 
__Pascal Bourguignon__                     http://www.informatimago.com/

The world will now reboot.  don't bother saving your artefacts.

regexp help

[Neal Becker]

I'm looking at outline mode.

I see outline-regexp is set to:
Its value is "[*\f]+"

Looking in emacs info, I see no reference to '\f'.  What is it?

Looking at a buffer in C-mode, I see:
Its value is "[^#\n^M]"

I don't recognize the '#', what does this mean?

Re: regexp help

[Johan Bockgård]

Neal Becker <ndbecker2@gmail.com> writes:

> I see outline-regexp is set to:
> Its value is "[*\f]+"
>
> Looking in emacs info, I see no reference to '\f'.  What is it?

Look it up in the Emacs Lisp manual (or do a full text search in the
Emacs manual).

     ?\f => 12                ; formfeed character, `C-l'

> Looking at a buffer in C-mode, I see:
> Its value is "[^#\n^M]"
>
> I don't recognize the '#', what does this mean?

Nothing special.  It stands for itself.

-- 
Johan Bockgård

Re: regexp help

[tyler]

Neal Becker <ndbecker2@gmail.com> writes:

> I'm looking at outline mode.
>
> I see outline-regexp is set to:
> Its value is "[*\f]+"
>
> Looking in emacs info, I see no reference to '\f'.  What is it?

It's an escape character indicating a 'formfeed'. 

>
> Looking at a buffer in C-mode, I see:
> Its value is "[^#\n^M]"
>
> I don't recognize the '#', what does this mean?
>

Sometimes a hash is just a hash. I'm not sure what the context is here,
but maybe it has something to do with recognising #include and #define
in c code.

HTH,

Tyler

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