* The use of "$"
@ 2014-09-28 21:17 Shiyuan
2014-09-28 22:40 ` Aurélien Aptel
0 siblings, 1 reply; 2+ messages in thread
From: Shiyuan @ 2014-09-28 21:17 UTC (permalink / raw)
To: help-gnu-emacs
Hi all,
I try to understand some source code which use the symbol "$":
(car (ein:$notebook-scratchsheets notebook))
What does "$" do in the above lisp expression? Thanks.
Shiyuan
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: The use of "$"
2014-09-28 21:17 The use of "$" Shiyuan
@ 2014-09-28 22:40 ` Aurélien Aptel
0 siblings, 0 replies; 2+ messages in thread
From: Aurélien Aptel @ 2014-09-28 22:40 UTC (permalink / raw)
To: Shiyuan; +Cc: help-gnu-emacs
On Sun, Sep 28, 2014 at 11:17 PM, Shiyuan <gshy2014@gmail.com> wrote:
> Hi all,
> I try to understand some source code which use the symbol "$":
>
> (car (ein:$notebook-scratchsheets notebook))
>
> What does "$" do in the above lisp expression? Thanks.
Nothing particular. $ can be part of a valid symbol.
(let (($a$ 40))
(+ $a$ 2))
=> 42
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2014-09-28 21:17 The use of "$" Shiyuan
2014-09-28 22:40 ` Aurélien Aptel
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