问题
How can I convert a list to string so I can call insert or message with it? I need to display c-offsets-alist but I got Wrong type argument: char-or-string-p for insert or Wrong type argument: stringp for message.
回答1:
I am not sure of what you are trying to achieve, but format converts "stuff" to strings. For instance:
(format "%s" your-list)
will return a representation of your list. message uses format internally, so
(message "%s" your-list)
will print it
回答2:
(format) will embed parentheses in the string, e.g.:
ELISP> (format "%s" '("foo" "bar"))
"(foo bar)"
Thus if you need an analogue to Ruby/JavaScript-like join(), there is (mapconcat):
ELISP> (mapconcat 'identity '("foo" "bar") " ")
"foo bar"
回答3:
Or
(prin1-to-string your-string)
Finally something special
(princ your-string)
回答4:
M-x pp-eval-expression RET c-offsets-alist RET
来源：https://stackoverflow.com/questions/18979300/how-to-convert-list-to-string-in-emacs-lisp