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How to make (format "%S" ...) print nothing?
From: |
Thorsten Jolitz |
Subject: |
How to make (format "%S" ...) print nothing? |
Date: |
Sat, 12 Jul 2014 12:43:41 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
Hi List,
I have a case where (format "%S" ...) is generally much more
convenient than (format "%s" ...), because it prints symbol args as
strings and string args as strings surrounded by double quotes, except
for this one situation:
Prints nothing:
#+begin_src emacs-lisp
(format "%s" "")
#+end_src
#+results:
but all of these print something
#+begin_src emacs-lisp
(format "%S" "")
#+end_src
#+results:
: ""
#+begin_src emacs-lisp
(format "%S" nil)
#+end_src
#+results:
: nil
#+begin_src emacs-lisp
(format "%S" ())
#+end_src
#+results:
: nil
Is there any way to use (format "%S"...) and have it print nothing
when given an empty string, an empty list or nil (or something else)?
--
cheers,
Thorsten
- How to make (format "%S" ...) print nothing?,
Thorsten Jolitz <=