The class of nil
. The nil
is the
sole instance of this class. The nil
is false,
along with the FALSE
object. Any other objects
are true.
Notice: This class is for internal use
only. The constant Nil
is not defined, and can
not be accessed from ruby scripts.
Kernel
self + other
Returns the argument, if it is either integer, float,
string, array. Otherwise raises TypeError
exception.