* own webbased newsgroup types
@ 2015-02-04 22:13 Stefan Huchler
2015-02-05 1:28 ` Helmut Waitzmann
0 siblings, 1 reply; 2+ messages in thread
From: Stefan Huchler @ 2015-02-04 22:13 UTC (permalink / raw)
To: info-gnus-english
I try to write own Group types for some web sites.
But I cant make any sense of old source parts. I am no big lisp
developer yet, but I dont find with google or emacshelp anything about
one thing.
(let ((last (car (last articles)))
(did nil)
I have no idea what this "did" thing is supposed to be
found it here:
Http://www.opensource.apple.com/source/emacs/emacs-51/emacs/lisp/gnus/nnslashdot.el
and here:
http://www.mit.edu/~mkgray/stuff/ath/afs/oldfiles/project/silk/root/afs/athena.mit.edu/contrib/xemacs/share/2005-12-08/xemacs-packages/lisp/gnus/nnultimate.el
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: own webbased newsgroup types
2015-02-04 22:13 own webbased newsgroup types Stefan Huchler
@ 2015-02-05 1:28 ` Helmut Waitzmann
0 siblings, 0 replies; 2+ messages in thread
From: Helmut Waitzmann @ 2015-02-05 1:28 UTC (permalink / raw)
To: info-gnus-english
Stefan Huchler <stefan.huchler@mail.de> writes:
> (let ((last (car (last articles)))
> (did nil)
>
>
>I have no idea what this "did" thing is supposed to be
You might read the documentation for the special form "let". To do
that, type C-h f let RET
Let me comment that documentation:
The first parameter of "let" is the VARLIST, a list of variables. Each
variable in that VARLIST is either a symbol: SYMBOL, which is bound to
nil, or it is a list of 2 elements: (SYMBOL VALUEFORM), which binds the
SYMBOL to the value of VALUEFORM.
In your example:
> (let ((last (car (last articles)))
> (did nil)
the first element of the VARLIST is a list of two elements:
(last (car (last articles)))
= (SYMBOL VALUEFORM)
which tells "let" to bind the SYMBOL "last" to the value of the
VALUEFORM (car (last articles)),
and the second element of the VARLIST is a list of two elements, as well:
(did nil)
= (SYMBOL VALUEFORM)
which tells "let" to bind the SYMBOL "did" to the value of the
VALUEFORM nil.
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