Question

我需要通过列中数组的交集对PySpark数据帧进行分组。例如，从这样的数据框中获取：

shift

结果应为：

key

因为第1行和第3行的值共有1。

交集时有类似分组的方法吗？

预先感谢您提出解决方案的想法和建议。

Answer 1

    Query autoComplete_search_query = databaseReference.orderByChild("ADDRESS").startAt(searchString).endAt(searchString+"\uf8ff");


    FirebaseRecyclerOptions<Inside_location> options=
            new FirebaseRecyclerOptions.Builder<Inside_location>()
                    .setQuery(autoComplete_search_query,Inside_location.class)
                    .setLifecycleOwner(this)
                    .build();


    adapter = new FirebaseRecyclerAdapter<Inside_location, InsideLocatinViewHolder>(options) {
        public long avgRating,sum=0;
        @Override
        protected void onBindViewHolder(@NonNull final InsideLocatinViewHolder holder, int position, @NonNull final Inside_location model) {
            //GET AVG RATING OF HOSTEL
            ratingRef.child(adapter.getRef(position).getKey()).addValueEventListener(new ValueEventListener() {
                @Override
                public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                    for (DataSnapshot dataSnapshot1 : dataSnapshot.getChildren()) {
                        for (DataSnapshot dataSnapshot11 : dataSnapshot1.getChildren()) {
                            sum += (long) dataSnapshot11.getValue();
                        }
                    }

                    if (dataSnapshot.getChildrenCount() == 0) {
                        avgRating = 1;
                    } else {
                        avgRating = (long) sum / dataSnapshot.getChildrenCount();
                    }
                    holder.RATING.setRating(avgRating);
                }
                @Override
                public void onCancelled(@NonNull DatabaseError databaseError) {

                }
            });
            holder.NAME.setText(model.getNAME());
            holder.ADDRESS.setText(model.getADDRESS());
            holder.PRICE.setText("INR "+model.getPRICE()+"*");
            holder.SHARING_TYPE.setText(model.getSHARING_TYPE());
            holder.SEX.setText(model.getSEX());

            Glide.with(insideHostelList.this).load(model.getPICTURES()).apply(new RequestOptions().override(300,185)).into(holder.PICTURES);
            mShimmerViewContainer.stopShimmerAnimation();
            mShimmerViewContainer.setVisibility(View.GONE);
            final Inside_location clickItem = model;
            holder.setItemClickListener(new itemClickListener() {
                @Override
                public void onClick(View view, int position, boolean isLongClick) {
                    ///  Toast.makeText(insideHostelList.this,""+clickItem.getNAME(),Toast.LENGTH_LONG).show();
                    Intent intent = new Intent(insideHostelList.this,hostelDetails.class);
                    intent.putExtra("insideHostelID",adapter.getRef(position).getKey());
                    startActivity(intent);
                    hostelIdforSelectedRoom = adapter.getRef(position).getKey();
                    double x = (double) model.getDOUBLE_ROOM_AVAILABLE()/2;
                    numberOfDoubleRoom= (int)Math.ceil(x);
                    numberOfSinlgeRoom=model.getSINGLE_ROOM_AVAILABLE();
                    bookedRoomPrice= model.getPRICE();
                    bookedRoomAddress=model.getADDRESS();
                    bookedHostelName = model.getNAME();
                    AvailableRoomTypes=model.getSHARING_TYPE();
                    //    Toast.makeText(insideHostelList.this,"db room:"+model.getDOUBLE_ROOM_AVAILABLE(),Toast.LENGTH_LONG).show();
                    //      Toast.makeText(insideHostelList.this,"si room:"+model.getSINGLE_ROOM_AVAILABLE(),Toast.LENGTH_LONG).show();

                }
            });
        }
        @NonNull
        @Override
        public InsideLocatinViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
            View view = LayoutInflater.from(viewGroup.getContext())
                    .inflate(R.layout.insidecardview, viewGroup, false);
            return new InsideLocatinViewHolder(view);
        }
    };

    // Log.d("TAG",""+adapter.getItemCount());
    recyclerView.setAdapter(adapter);
}

通过交集分组pyspark数据帧

1 个答案: