In one of my setup files I have this:

> (eval-after-load 'ruby-mode
>   '(add-hook 'ruby-mode-hook (function
> 			      (lambda ()
> 				(ruby-electric-mode t)))))

Other places, I just do the add-hook.

The reason I'm asking is because I need to do:

> (eval-after-load 'grep
>   '(add-to-list 'grep-files-aliases (cons "rails" "*.rb *.erb *.js *.css *.scss")))


because if I don't, I get an error that says grep-files-aliases is not defined.  It appears as if add-hook has smarts that add-to-list does not have but I wanted to be sure which method was preferred.

Thank you,
Perry