How to change setting for all modes except one?

Question

How can I chance an Emacs config setting (let's say "highlighting of current line") that I set in .emacs as (global-hl-line-mode +1), to work for all modes except one.

For example, I want highlighting of current line to be on for all modes except org-mode.

A great solution would be one that would also be applicable to customizing theme to be different by major mode (though file type could work fine for this too).

Answer 1

Usually you customize a mode adding functions to the mode hook. To disable the hl-line-mode use the following code

(add-hook 'org-mode-hook
          (lambda ()
            (set (make-local-variable 'global-hl-line-mode) nil)))

For more complex cases it's better to define a new function and add it to the hook.