code: public static DoubleStreamEx of(Double[] array) {
          return seq(Arrays.stream(array).mapToDouble(Double::doubleValue));
      }
docs: Returns a sequential ordered {@code DoubleStreamEx} whose elements are
  the unboxed elements of supplied array.
  
  @param array the array to create the stream from.
  @return the new stream
  @see Arrays#stream(Object[])
  @since 0.5.0