nulll | Meeeh -

I need to output in a single column the value of a field A if it's not null or the value of field B if not null or nothing if both A and B are null.

When I just had filed A to test I wrote this which worked ok

My code is as below. I have created a column "degree" based on another column which contains integers from 1 to 5.

My code below seems to work because the column has been created sucessfully. However, when I call any code based on the "degrees" column I get NULLL str(my_data$degree)

I'm using Google Colab for learning Python. In this Google Colab notebook I've built for demostration, I was able to get some JSON data and visualize it with Altair.

This is the chart image I got so far - you can interact with the data in the linked Google Colab notebook or directly in the vega-editor ready with the sample data:

Below is the explanation of the data I have and what I want to show:

In Yu-Gi-Oh! TCG, cards came from a certain card set. In each card set are Monster, Spell and Trap cards - as well another type of cards like: Link Monsters, XYZ monsters, etc.

A normal JSON structure of a monster card (- for this purpose - has ATK and DEF) has the following JSON structure:

Why should I use debugFillProperties in the stateful widget in Flutter? I have seen Some flutter Built-in stateful widgets Like Slider using this method.

I went through Flutter Docs given here. I'm still not able to understand the practical usage of debugFillProperties. When or why use it?

I tried It in My example code, Still Not able to understand. I did not find any docs or relevant information was found about this method in Flutter.

I have a CSV file in which columns are supposed to be empty strings and not null. Unfortunately when I try to import the CSV with the empty string into my oracle database, for example:

3,3,"","","",f,f

I get the error message:

ORA-01400: cannot insert NULL into...

I get that because the columns are set not to accept null but rather an empty string and for some strange reason quote marks without white space is interpreted by oracle as nulll whilst reading through the CSV.

My idea was to use gsub to go through the CSV file and to add a white space to the occurrence

,"",

so that it looks like the following:

3,3," "," "," ",f,f

This seems to work when I tested it by manually adding spaces between the quote marks and importing into the db. I tried automating this as I have 40+ CSV files. So far I had:

...

I hope to register with autofac property injection,But can't work ClassA property = null.Not injected successfully,how to change my code

Could anyone help in suggesting how to fetch the top n rows recursively from a file.

The requirement is download content from SharePoint site which has xml content and that should be converted to json data file. So each time we download, it should pick first 1000 rows and write it back to one json file, and in next iteration it should fetch next 1000 rows recursively and write the data to second json file and so on until the entire content from webpage is completely loaded into n number of files.

Here is the PowerShell script for reference and we have to code it in Python Scripting..

Desired Result: I am trying to display/plot all the data by default with NULL value in selectInut by default and filter data only when when some non null input value is selected in selectInput shiny app.

I came across Force no default selection in selectInput() SO post to add NULL values to the SelectInput and it worked only partially for me till now.

Issue: It only works when I select some non nulll value otherwise produces blank output (seems like if else failure here could be due to reactive() function but I am not sure why that is happening).

ui

I am trying to create an XMLAdapter class for one of my objects. I need to access Getters from another class so that some of the objects can be populated from that class's Getters` but I am unable to do so.

Basically, I would like to access my Child class Getter methods within the XMLAdapter. I can create an Object of the Child class and access but it results in NULL. Initially, I am populating the Objects in the Child and Parent class. I would like to access the same value within XML Adapter so I am wondering if there is a way to pass reference of a class to my XMLAdapter.

I have the following Parent class which will have the values: