Extracted from Pike v7.8 release 866 at 2016-11-06.
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SDL
SDL.Joystick

Methods
 create()
 get_axis()
 get_ball()
 get_button()
 get_hat()
 index()
 name()
 num_axes()
 num_balls()
 num_buttons()
 num_hats()
previousSDL.Joystick()->num_axes()
SDL.Joystick()->num_buttons()next

Method SDL.Joystick()->num_balls()

Method num_balls

int num_balls()

FIXME

Document this function