infinite-list | Infinite list javascript | Animation library

I am following this tutorial by Raywenderlich on paging-library-for-android-with-kotlin on how to use android paging library. This is one of the easiest tutorials on the net and I have followed it thoroughly. However, I would like to make some changes so that I can intelligently switch between online data and offline data.

That is, I have old some posts in my database. Initially I have internet connection. So I load latest data from internet, then insert it into my database. Finally, I show this latest data in my recyclerView / PagedListAdapter. If for some reason, there is no internet connection after sometime, I should show the old posts from database.

How can I do this?

This is my code on github repository.

Here, I tried to create a factory pattern. It checks if initially I have internet, the factory returns pagedList from online dataSource. ELse, the factory returns pagedList from offline dataSource. But this doesnot intelligently switch between the 2 states.

I tried some random codes such as creating a boundary callback. But I am not sure how to make the necessary changes. I am not adding codes here (at least for now) to keep it short and precise.

Can anyone help me?

To be specific, I am loading paged data primarily from network. If there is a network error, I don't want to show the user an error. Instead I load paged data from cache / database and continuously show it to my user as long as possible. If the network is back,switch back to network paged data. (that's what instagram / facebook does I think). What is the appropriate way to implement this? See my code / attemp in the answer.

I use flatList to make a list of elements. I would like to show 15 elements and then add a button "see more" to show the next 15 etc. I was about tu use this tutorial : https://aboutreact.com/react-native-flatlist-pagination-to-load-more-data-dynamically-infinite-list/ But I don't need to use fetch, I already have set up the data (state.listData) and in fact, I'm a little lost on how to adapt it...

I thought that maybe anyone could help me a little. Thanks a lot

I have a view which displays a list of posts. I have implemented infinite scrolling, and it is functioning properly. however, there is one small problem I am running into, and attempts to solve it have me going round in circles.

Main view

I am trying to understand the "Streams as arrows" section in John Hughes' famous "Generalising Arrows to Monads". To be more precise, I am interested in writing down the Fibonacci stream.

I tweaked Hughes' definition a bit:

I'm trying to understand something about Haskell functions.

First, here is a Fibonacci function defined in the typical "slow" way (i.e. recursive with no memoization, and no infinite-list tricks)

This has been discussed to death here on SO, but my specific example is escaping me because I feel that my fold shouldn't care whether it's composed right-to-left or left-to-right. This is a solution to day 1 of 2016's Advent of Code which boils down to taking a list of instructions (turn right/left, walk x steps forward), applying them, and giving the taxicab-geometry distance between where you end up and where you started.

I wrote an apply function to handle one step of this journey, which has signature:

Literary i can't make a stable apk for the last 2 weeks, this driving me nuts!

I have followed the react-native-firebase documentation 1:1

My package.json:

React native app acting up again when trying to build release apk for android.

Here's the error:

I try to execute below script in Cefsharp to click on a DIV element, and not working.