gistfile1.hpp

    // Ruby.primitive :array_hash
    Fixnum* array_hash(STATE, Array* other) {
      size_t hash = this->size();
      for (size_t idx = 0; idx < other->size(); idx++) {
        hash  = (hash << 1) | (hash < 0 ? 1 : 0);
        hash ^= as<Fixnum>(other->get(state, idx)).to_long();
      }
      return Fixnum::from(this->size());
    }