Categories
Mastering Development

how to refresh recyclerview after making some change on sqlite database

My app has recyclerview in fragment and when I click one of the list inside recyclerview, on the next page, there is check button that I can update a value on sqlite database. With this updating, I can change order of list of recyclerview. Since sqlite database is not like firebase addlistener. It can not […]

Categories
User Help

[ffmpeg]: Records black screen with title bar if window is dynamically opened

I am working on a Node HTTP server which listens for recording a browser window when an HTTP request comes in. The HTTP request spawns a browser window and then spawn ffmpeg to target that window for recording by title. The issue is this works in Windows 7 but, not in Windows 10. Previously, when […]

Categories
Mastering Development

Finding Contact Jacobian by mirroring internal function CalcNormalAndTangentContactJacobians()

I’m trying to find contact Jacobian defined as M(q) q_ddot + C(q, q_dot) = G(q) + B(q) u + J'(q) lambda. I tried to mirror the function CalcNormalAndTangentContactJacobians() as in multibody_plant.cclink but the values are not adding up. Here is how I setup the system (for the simplest setup possible): I have a cylinder mounted […]

Categories
Mastering Development

skewed class classificationn with neural network with not much data; procedure to follow

I use Octave with neural network (based on Andrew Ng course ex4) to classify (3 classes). 99% of expected network output fall in class 3 (42 ‘non-class 3’ results) . Thera are 330 features at the input layer. I have 4300 examples to train, so I divided the Train, Cv, and Test sets in a […]

Categories
Mastering Development

The values that I enter into my to-do list don’t get entered, it shows the following error:

THIS IS THE CODE I HAVE WRITTEN FOR CREATING TABLES. package com.example.justdoit; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import com.example.justdoit.DTO.ToDo; import com.example.justdoit.DTO.ToDoItem; import java.util.ArrayList; import static com.example.justdoit.Const.*; public class DBHandler extends SQLiteOpenHelper { public DBHandler(Context context){super(context, DB_NAME, null, DB_VERSION);} @Override public void onCreate(SQLiteDatabase db) { String createToDoTable = “CREATE TABLE “+ […]

Categories
Development

Use collection view with rxdatasource

I am trying to use collection view with RxDataSource but the problem is that it is not working for the custom class. This is working only for section type. I want to replace the AnimatedModel with PlaceModel conform protocol of Codable class. let dataSource = RxCollectionViewSectionedReloadDataSource(configureCell: {ds,cv,index,sec in let cell = cv.dequeueReusableCell(withReuseIdentifier: cellID().itemCell , for: […]

Categories
Development

Multiple RTSPs receive method

I am trying to code a project which I have at least 20 rtsp CCTV URL going to access at same time. I tried to use ffmpeg to reach out my goal via multiple input method. However, there is a problem. ffmpeg -i URL_1 -i URL_2 – The command above is the example I tried. […]

Categories
Development User Help

Chrome Browser tab crashes when not active

I have a heavy javascript code , something like below for(i=1;i<=100;i++) { var ceiv = 100.0* implied_volatility(0, ceprice,hmmprice, price, rfi, dvd, t) } function implied_volatility(i, p, s, x, rfi, dvd, t) { var cv = function(sigma) { var sst = sigma * Math.sqrt(t); var d1 = (Math.log(s / x) + (rfi – dvd + sigma […]

Categories
Development

Adding new field containing file in Laravel registration

I wanted to customize the Laravel auth system by adding more fields to it. I wanted the user to upload a few images during registration, and I am not sure on what to add on the create() method in RegisterController to add the file name into the database, also the file itself to the public […]

Categories
Development

send a row from a listview saved in database sqlite to another listview and make it do the same as the row in the first listview

i have two activities each one of them have a listview the first one is connected to a data base and get its data from strings.xml i want to send a row to the other listview in the aother activity and make it do the same as if it was in the first list view […]