quaver | Base on Vue2 | Game Engine library
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QUESTION
I creating a database application on AndroidStudio using Kotlin for a University project. I am trying to create the database using SQLite. Below is my DBHelper kt file that I created to start the database. When I call one of the functions to create the database, the application crashes. When I check the .db files from the database in SQL Cypher the tables do not appear. The errors aren't descriptive enough for me to find out how to fix it. Thank you for your help.
...ANSWER
Answered 2020-Jul-30 at 13:32You're calling fillQuestionsTable()
in your database helper onCreate()
and that fill function eventually accesses writableDatabase
which is the reason for the "called recursively" error.
Pass the SQLiteDatabase
parameter from onCreate()
down to the fill/insert functions and remove the writableDatabase
accesses.
QUESTION
I have a solution with 4 projects.
In the UI project, I have this XAML:
...ANSWER
Answered 2017-May-28 at 22:11You have 2 solutions:
1) Keep Sesion
static and implement StaticPropertyChanged
like @elgonzo suggested;
2) Make Sesion
a singleton. This is a better solution because you have more control on the Sesion
lifetime. Also, you can use Dependency Injection and other useful patterns that work only with class instances (for example the DataContext
property), not static classes.
Singleton code snippet:
QUESTION
I am trying to design a piano for an assignment in C#. I have created a MusicKey class which stores music keys (as well as a BlackMusicKey class). I am populating the panel, 'panel1' with music keys like this:
...ANSWER
Answered 2018-Dec-20 at 14:24According to Form1 class code, there is constructor missing. Please add proper constructor with InitializeComponent()
method call. It can be added anywhere in class body.
Code snippet:
QUESTION
Using phpstorm, trying to get mongoDB server up and running using nodeJS, i have mongo installed and have created the required folders on the c drive to store database, proceeded by going to command prompt and entering mongod, to get mongo db running....
checked npm ls,mongoose and mongo are listed fine, and are also present in my package json file.
when i try to run the index file from commmand prompt 'node index.js' i get the following error, see pic for details, i have included, the code used for setting up mongo... i have disable mongoserver from phpstorm repository, and use the one from the mongodb website
"mongodb": "3.0.0-rc0", "mongoose": "^5.0.0-rc2",
...ANSWER
Answered 2018-Jan-16 at 10:41error sorted by omitting the following lines from the semver.js file, in the node modules folder in the current project
line 203,204
//re[COMPARATORTRIM] = new RegExp(src[COMPARATORTRIM], 'g'); //nodevar comparatorTrimReplace = '$a$2$3';
and line 232
// re[i] = new RegExp(src[i]);
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