/* * call-seq: * dvector.include?(number) -> true or false * * Returns <code>true</code> if _number_ is present in * _dvector_, <code>false</code> otherwise. * * a = Dvector[ 1, 2, 3 ] * a.include?(2) -> true * a.include?(0) -> false */ VALUE dvector_includes(VALUE ary, VALUE item) {