-map <right> <nop>
-map <left> <nop>
-map <up> <nop>
-map <down> <nop>
-imap <right> <nop>
-imap <left> <nop>
-imap <up> <nop>
-imap <down> <nop>
-" Also disable up and down array in command mode, use <C-p>/<C-n> as
-" replacement (see below).
-cmap <up> <nop>
-cmap <down> <nop>