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Re: Adding `#' at each new line with text until the end of the file
From: |
Merciadri Luca |
Subject: |
Re: Adding `#' at each new line with text until the end of the file |
Date: |
Wed, 08 Dec 2010 15:09:15 -0000 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux) |
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pjb@informatimago.com (Pascal J. Bourguignon) writes:
> Merciadri Luca <Luca.Merciadri@student.ulg.ac.be> writes:
>
>> pjb@informatimago.com (Pascal J. Bourguignon) writes:
>>
>>> Merciadri Luca <Luca.Merciadri@student.ulg.ac.be> writes:
>>>
>>>> pjb@informatimago.com (Pascal J. Bourguignon) writes:
>>>>
>>>>>> Sure, but, as I explained in my previous message, it does not even
>>>>>> modify the Sayings file. Why?
>>>>>
>>>>> Because you didn't instruct the program to modify the file.
>>>>> Read the documentation of insert, for example. Does it mention files?
>>>>> What does insert modify?
>>>> Insert modifies the current buffer, according to the manual. Or
>>>> find-file loads its arg into a buffer. So, if find-file loads its arg
>>>> into the *current* buffer, insert should modify the current buffer,
>>>> that is, `Sayings'.
>>>
>>> (list
>>> (progn (find-file "/tmp/Sayings")
>>> (buffer-name (current-buffer)))
>>> (progn (find-file "/mnt/Sayings")
>>> (buffer-name (current-buffer))))
>>> --> ("Sayings" "Sayings<2>")
>>>
>>> Here you have two files, named "/tmp/Sayings" and "/mnt/Sayings", and
>>> when opening them at the same time, we get "Sayings" and "Sayings<2>"
>>> as buffer names.
>>>
>>> Clearly, the buffer names are not entirely independant from the file
>>> names, but it should be obvious from the example, that there's two
>>> name spaces and two different kind of entities. A buffer named "X" is
>>> not a file name "X".
>>>
>>> So to repeat what you wrote above:
>>>
>>> - find-file (or find-file-noselect) loads the contents of a _file_
>>> into a _buffer_.
>>>
>>> - insert modifies the contents of a _buffer_.
>>>
>>> When you do only these to action what happens to the _file_?
>> Nothing, actually. That's the problem.
>
> Yes. That's because you haven't said something. What should you say
> to have the file modified in any way?
>
>
> Something like:
>
> - save the buffer to the file, keeping a backup of the old file.
>
> or, in emacs lisp:
>
> (save-buffer 1)
>
> Remember: Computers only do what you tell them to do! ;-)
Yes.
Thanks for your implication in this.
I am now trying with
==
(defun fildi ()
(find-file "~/Sayings")
;(goto-char (point-min))
(while (< (point) (point-max))
(when (looking-at ".")
(insert "#"))
(forward-line))
(save-buffer 1)
)
==
which `should' do the trick, as the file is found, opened in the
buffer, the buffer is modified as I want it to be, and the buffer is
then saved. Why is it still erroneous?
Thanks.
- --
Merciadri Luca
See http://www.student.montefiore.ulg.ac.be/~merciadri/
- --
A real friend is someone who walks in when the rest of the world walks out.
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- Adding `#' at each new line with text until the end of the file, Merciadri Luca, 2010/12/08
- Re: Adding `#' at each new line with text until the end of the file, Pascal J. Bourguignon, 2010/12/08
- Re: Adding `#' at each new line with text until the end of the file, Merciadri Luca, 2010/12/08
- Message not available
- Re: Adding `#' at each new line with text until the end of the file, Merciadri Luca, 2010/12/08
- Re: Adding `#' at each new line with text until the end of the file, Pascal J. Bourguignon, 2010/12/08
- Re: Adding `#' at each new line with text until the end of the file, Merciadri Luca, 2010/12/08
- Re: Adding `#' at each new line with text until the end of the file, Pascal J. Bourguignon, 2010/12/08
- Re: Adding `#' at each new line with text until the end of the file, Merciadri Luca, 2010/12/08
- Re: Adding `#' at each new line with text until the end of the file, Pascal J. Bourguignon, 2010/12/08
- Re: Adding `#' at each new line with text until the end of the file,
Merciadri Luca <=
- Re: Adding `#' at each new line with text until the end of the file, Andreas Politz, 2010/12/08