Category "null"

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

Entity Framework : Value cannot be null. Parameter name: type

When I execute update-database command, it shows this error message System.ArgumentNullException: Value cannot be null. Parameter name: type at Sy

How to display nulls in PowerPivot using DAX

I have heard amazing things about PowerPivot but for me it's not been so helpful. Pivot charts are often using a count function and this is where me and PowerPi

Java Serialization/De-serialization giving null object references

I'm working on a group project and we've run into a problem with the serialization part of our software. We have the class protocol: import java.io.Seria

Sum with nulls "not working" in SQL Server / Azure

I'm trying to average a set of columns and exclude rows with zero from the denominator by using a case statement within an AVG() function. I read that avg() exc

If "null=True", which is stored in DB "NULL" or "empty values"?

I created the django model "User" with "null=True" as shown below: # "myapp/models.py" from django.db import models class User(models.Model):

Define an "Unknown" or "NULL" value in an enum

I am defining a custom typedef Elements as follows.... typedef enum { Ar, Cl, F, He, H, Kr, Ne, N, O, Rn, Xe } Ele

How to 'cut' on null?

Unix 'file' command has a -0 option to output a null character after a filename. This is supposedly good for using with 'cut'. From man file: -0, --print0

Check If array is null or not in php

I have an array like below which is generated by parsing a xml url. The array is Array ( [Tags] => SimpleXMLElement Object ( [0] =>

How to check for empty value in Javascript?

I am working on a method of retrieving an array of hidden inputs in my form like so <input type="hidden" value="12:34:00" name="timetemp0"> <input typ

Is there a way to set a variable up to place output to stdout or null?

I would like to set up a variable in my code that would ultimately define if I'll see some output or not. "hello" writes to stdout "hello" > $null supresses

What is a 'NoneType' object?

I'm getting this error when I run my python script: TypeError: cannot concatenate 'str' and 'NoneType' objects I'm pretty sure the 'str' means string, but I

How do I check for null values in JavaScript?

How can I check for null values in JavaScript? I wrote the code below but it didn't work. if (pass == null || cpass == null || email == null || cemail == null