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Re: function evaluated, but cannot execute


From: ken
Subject: Re: function evaluated, but cannot execute
Date: Tue, 26 Apr 2011 18:17:59 -0400
User-agent: Thunderbird 2.0.0.24 (X11/20101213)

On 04/26/2011 05:48 PM PJ Weisberg wrote:
> On Tuesday, April 26, 2011, ken <address@hidden> wrote:
>> Testing little function to learn from...
>>
>> (defun my-prepend-to-file ()
>>   "Prepend some hard-coded text to specified file."
>>   (let ((oldbuf (current-buffer)))
>>     (save-current-buffer
>>       (set-buffer (get-buffer-create "/home/zl/tmp/test.html"))
>>       (insert "\n\nText inserted by my-prepend-to-file.\n\n"))))
>>
>> I evaluate this function.  No problem.
>>
>> I do "C-h f my-prepend-to-file RET", emacs displays in the other window:
>>
>> my-prepend-to-file is a Lisp function.
>>
>> (my-prepend-to-file)
>>
>> Prepend some hard-coded text to specified file.
>>
>> [back]
>>
>> But when I do "M-x my-prepend-to-file RET", emacs responds "[No match]".
>>  So what's wrong?
>>
>>
>> tia,
>> ken
> 
> Right after the docstring, put (interactive).  (If the function took
> arguments you would have to put more stuff inside the 'interactive'
> form, but that's enough to be able to call it from M-x or with a
> keybinding.
> 
> And you want 'find-file' or 'find-file-noselect' instead of 
> 'get-buffer-create'.
> 

Thanks for the tip.  Yeah, for some reason get-buffer-create fails, does
nothing.  Replacing it with find-file or *-select works fine.  Strange
because I scarfed the code from an emacs Info page and the *Help* page
says get-buffer-create will accept a file as an arg.  I'll just say,
"That's perplexing."

thanks++,
ken


-- 
Anything is easy if you know how to do it.



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