Re: Docs submitted

Re: Docs submitted

[Stephan Schmitt]

> > (eval-after-load 'org
> >  '(progn
> > ;;^--HERE.
> >     (add-to-list 'org-todo-setup-filter-hook
> > 		  #'org-choose-setup-filter)
> >     (add-to-list 'org-todo-get-default-hook
> > 		  #'org-choose-get-default-mark)
> >     (add-to-list 'org-trigger-hook
> > 		  #'org-choose-keep-sensible)
> >     (add-to-list 'org-todo-interpretation-widgets
> > 		  '(:tag "Choose   (to record decisions)" choose)
> > 		  'append)
> >   ))
> >
> 
> Hi Tom,
> 
> maybe you can educate me:  I have never understood what the "#" does
> in code like the one you have here.  You are using it, so maybe you  
> know?
> 
> - Carsten


Hi,

from [[info:elisp:Anonymous%20Functions]]:

>    We sometimes write `function' instead of `quote' when quoting the
> name of a function, but this usage is just a sort of comment:
> 
>      (function SYMBOL) == (quote SYMBOL) == 'SYMBOL
> 
>    The read syntax `#'' is a short-hand for using `function'.  For
> example,
> 
>      #'(lambda (x) (* x x))
> 
> is equivalent to
> 
>      (function (lambda (x) (* x x)))

so #'foo is the same as 'foo but indicates that foo is a function

hth,
	Stephan

Re: Docs submitted

[Bernt Hansen]

Carsten Dominik <dominik@science.uva.nl> writes:

> On Feb 11, 2009, at 2:08 AM, Tom Breton (Tehom) wrote:
>
>> (eval-after-load 'org
>>  '(progn
>> ;;^--HERE.
>>     (add-to-list 'org-todo-setup-filter-hook
>> 		  #'org-choose-setup-filter)
>>     (add-to-list 'org-todo-get-default-hook
>> 		  #'org-choose-get-default-mark)
>>     (add-to-list 'org-trigger-hook
>> 		  #'org-choose-keep-sensible)
>>     (add-to-list 'org-todo-interpretation-widgets
>> 		  '(:tag "Choose   (to record decisions)" choose)
>> 		  'append)
>>   ))
>>
>
> Hi Tom,
>
> maybe you can educate me:  I have never understood what the "#" does
> in code like the one you have here.  You are using it, so maybe you
> know?

As I understand it (from my book on Common Lisp) #'some-function is used
to quote function names.  'some-function quotes a variable.

It means "Get me the function with the following name" - without the #',
Lisp would treat some-function as the name of a variable and look up the
value of the variable, not the function.

-Bernt