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The cast to value type 'Int32' failed because the materialized value is null
...nd other aggregate functions will return null when applied to an empty dataset. Contrary to their definition, in reality they return a nullable version of the underlying type.
– Suncat2000
Jul 18 '14 at 12:19
...
What is the difference between mocking and spying when using Mockito?
...and stub one method you have two options:
Using a mock you would have to set it up by invoking 7
callRealMethod and stub one method
Using a spy you have to set it up by stubbing one method
The official documentation on doCallRealMethod recommends using a spy for partial mocks.
See also java...
Creating a textarea with auto-resize
...e already changed text */
function delayedResize () {
window.setTimeout(resize, 0);
}
observe(text, 'change', resize);
observe(text, 'cut', delayedResize);
observe(text, 'paste', delayedResize);
observe(text, 'drop', delayedResize);
observe(text,...
Reset AutoIncrement in SQL Server after Delete
.... Also be careful that you don't have records higher than the seed you are setting.
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How To Create Table with Identity Column
...t I am about to blow away because I did not create it with the ID column set to be the table's Identity column.
4 Answers...
EF Code First “Invalid column name 'Discriminator'” but no inheritance
...the derived class.
Example:
class Person
{
public string Name { get; set; }
}
[NotMapped]
class PersonViewModel : Person
{
public bool UpdateProfile { get; set; }
}
Now, even if you map the Person class to the Person table on the database, a "Discriminator" column will not be created be...
Order discrete x scale by frequency/value
...
Try manually setting the levels of the factor on the x-axis. For example:
library(ggplot2)
# Automatic levels
ggplot(mtcars, aes(factor(cyl))) + geom_bar()
# Manual levels
cyl_table <- table(mtcars$cyl)
cyl_levels <- names...
How do I pass a variable by reference?
...t', the_list)
the_list = ['and', 'we', 'can', 'not', 'lie']
print('set to', the_list)
outer_list = ['we', 'like', 'proper', 'English']
print('before, outer_list =', outer_list)
try_to_change_list_reference(outer_list)
print('after, outer_list =', outer_list)
Output:
before, outer_list =...
varbinary to string on SQL Server
...e or DECOMPRESS functions) you can just CAST it
declare @b varbinary(max)
set @b = 0x5468697320697320612074657374
select cast(@b as varchar(max)) /*Returns "This is a test"*/
This is the equivalent of using CONVERT with a style parameter of 0.
CONVERT(varchar(max), @b, 0)
Other style paramet...
Which is best way to define constants in android, either static class, interface or xml resource?
...s web service to get data from server, for that I'm having three different set of URLs to point development system, test server and live server. It's difficult to change URL whenever I want to give application for testing/live. so I planned to make it as configurable, so that application can get app...