How to convert list to string in Emacs Lisp

Question

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 a

Answer 1

(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"