emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?

Question

What does this do?

(add-hook \'compilation-mode-hook #\'my-setup-compile-mode)

...and is it different than

(add-hook \'com         


        

Answer 1

The should-be-comprehensive list can be found at the top of the Emacs lisp reference index.

Edit: Or even more conveniently, from within Emacs itself:

• M-x info RET (open the info browser)

• d m elisp RET (open the elisp manual)

• I # RET (list the entries for # in the index)