What has changed in buffer?

What has changed in buffer?

[Neal Becker]

I go to quit emacs, or kill a buffer.  It has been modified.  How can I see what 
the changes are?  An ediff for this would be nice.

You know what would be great?  If when asking whether to save the buffer, emacs 
would offer to show the diff.

Re: What has changed in buffer?

[Perry Smith]

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On Jul 19, 2011, at 7:07 AM, Neal Becker wrote:

> I go to quit emacs, or kill a buffer.  It has been modified.  How can I see what 
> the changes are?  An ediff for this would be nice.
> 
> You know what would be great?  If when asking whether to save the buffer, emacs 
> would offer to show the diff.

I like your suggestion.

What I do is "undo" which tends to remind me what / where the buffer got changed.  Often it was by accident.  And if I want to keep the changes, I redo and then save.


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Re: What has changed in buffer?

[Teemu Likonen]

* 2011-07-19T08:07:54-04:00 * Neal Becker wrote:

> I go to quit emacs, or kill a buffer. It has been modified. How can I
> see what the changes are? An ediff for this would be nice.

To compare a buffer with the associated file:

    M-x diff-buffer-with-file

Re: What has changed in buffer?

[Memnon Anon]

Neal Becker <ndbecker2@gmail.com> writes:

> I go to quit emacs, or kill a buffer.  It has been modified.  How can I see what 
> the changes are?  An ediff for this would be nice.

,----[ (info "(emacs)Save Commands") ]
| `d'
|      Diff the buffer against its corresponding file, so you can see what
|      changes you would be saving.  This calls the command
|      `diff-buffer-with-file' (*note Comparing Files::).
`----

hth
Memnon

Re: What has changed in buffer?

[Tom Davey]

On Tue, Jul 19, 2011 at 8:22 AM, Teemu Likonen <tlikonen@iki.fi> wrote:

> To compare a buffer with the associated file:
>
>    M-x diff-buffer-with-file

I run Emacs on Windows, so I downloaded and installed the GNU diff
utilities from here --

http://gnuwin32.sourceforge.net/packages/diffutils.htm

-- and added "C:\Program Files\GnuWin32\bin" to my executable path.

Then I typed "M-x diff-buffer-with-file" and . . .

. . . voila! It works perfectly. Thanks very much for the info.

--
Tom Davey
tom@tomdavey.com
New York NY USA