/*
 *  call-seq:
 *     dtable.remainder(number)          ->  a_dtable
 *     dtable.remainder(other)           ->  a_dtable
 *  
 *  When the argument is a number, this operation returns a copy of _dtable_ with each entry x replaced by the remainder of x divided by _number_.
 *  When the argument is a data array, this operation returns a copy of _dtable_ with each entry x replaced
 *  by the remainder of x divided by the corresponding entry in the _other_ data array.
 */ VALUE dtable_remainder(VALUE ary, VALUE arg) {