Category "null"

Make String.format("%s", arg) display null-valued arguments differently from "null"

Consider the custom toString() implementation of a bean: @Override public String toString() { String.format("this is %s", this.someField); } This yields

(FLUTTER) --- RangeError (index): Invalid value: Valid value range is empty: 0

Row( mainAxisAlignment: MainAxisAlignment.center, children: [ Padding( padding: const EdgeInsets.all(8.0), child: Icon( password[0] == null ? unchangedPassword

Is it necessary to use null two times at the end of the code?

I have one question. Help me, please. I have code in my teaching proggram: alert(user.address ? user.address.street ? user.address.street.name : null : null);

Unable to determine what type of blank, null, na or anything else in R dataframe

I have a data frame loaded from an Excel csv. One columns has many "NULL". This is what is showing up when looking at the data in RStudio. When I filter in the

How do i join on null in two table in sql? inner join, left,right,full n cross join -- Interview Question Tech Mahindra

Create table TechM ( id int ) ; select * from TechM insert into TechM values (1), (1), (1), (2), (3), (null) ; Create table TechN ( id int ) ; select * from Tec

SQL Server - NULL vs blank in IF condition - ISNULL vs COALESCE

I am expecting ELSE part to be printed in this case. But it doesn't. It works if the input is blank ''. But for null, it fails. Even with ISNULL and COALESCE, i

SQL Server: Limit filling NULL values up to row with specific text

I have a CTE on which i am filling null values with the previous value before row 100 available by using the following script SELECT [YearMonth],grp, CASE WHEN

How to write code to catch null exception in python

I have below code, which I want to write in a way so that it catches proper exception when none is passed when argument value is required. def MyFunction(MyAr

SELECT * FROM `Languages` WHERE `Google` IS NOT NULL; returns NULL values?

In my mariadb database this query: SELECT * FROM `Languages` WHERE `Google` IS NOT NULL; Returns rows where column "Google" is NULL, which it shouldn´t. A

form-data prameters are sent in body, causing the getParameter method to return null

I've recently upgraded to the spring boot version 2.6.3 while using camunda 7.17.0. The login camunda page, sends a post request, but the form-data parameters a

Oracle SQL how to export null values

in relation with how to copy the records from output of oracle SQL developer to excel sheet I'm using Oracle SQL developer. I've some queries which get some nul

How to handle JMESPath contains filter on attribute that may be null?

I want to filter the output from the Azure CloudShell command az ad sp list which outputs a JSON array, eg by filtering to Publisher Name = "ACME". All az comma

What is a NullReferenceException, and how do I fix it?

I have some code and when it executes, it throws a NullReferenceException, saying: Object reference not set to an instance of an object.

Codewars Challenge - JavaScript - Find the first non-consecutive number in Array

Link to Codewars challenge This is very basic, but for some reason, I can't figure out why I'm not able to return null when there are not any non-consecutive n

Flutter : Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null

I run my flutter app on (Flutter 3.0 and dart sdk 2.17.0. But now I found a warning here, like this - /usr/local/Caskroom/flutter/2.0.2/flutter/.pub-cache/hoste

Why do MySQL 8 IF and IFNULL return a BLOB result when testing a variable with value NULL?

Note: I have moved the essence of this question to here having learned some of what is happening but still wanting to understand. (In essence, ISNULL and COALES

SQL Server : MERGE causing cannot insert the value NULL into column

I am doing a MERGE in SQL Server using the following code MERGE INTO DW_Datawarehouse.[dbo].[DWF_WAREHOUSE] with (HOLDLOCK) AS target USING #DataSource AS Sourc

Writing a query for alternative column names as mentioned below eg

The query for, If the address is missing, displays the email id. If both address and email are missing then display ‘NA’. Give an alias name as CONT

How to define default null value in application.yml in Spring Boot

I'm trying to define the default value as null value in application.yml with SpringBoot version 1.3.0.RELEASE. The goal is be able to refer it with a class with

Attempt to index global 'object' (a nil value)

So this is the error I have been getting: Game.lua:66: attempt to index global 'Spears' (a nil value) stack traceback: Game.lua:66: in

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