I know Scope_Identity(), Identity(), @@Identity, and Ident_Current() all get the value of the identity column, but I would love to know the difference. Part of the controversy I’m having is what do they mean by scope as applied to these functions above? I would also love a simple example of different scenarios of using them? … Read more
I have an Article entity in my project which has the ApplicationUser property named Author. How can I get the full object of currently logged ApplicationUser? While creating a new article, I have to set the Author property in Article to the current ApplicationUser. In the old Membership mechanism it was simple, but in the … Read more
When a class in Java doesn’t override hashCode(), printing an instance of this class gives a nice unique number. The Javadoc of Object says about hashCode(): As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. But when the class overrides hashCode(), how can I … Read more
There have been some discussions here about JPA entities and which hashCode()/equals() implementation should be used for JPA entity classes. Most (if not all) of them depend on Hibernate, but I’d like to discuss them JPA-implementation-neutrally (I am using EclipseLink, by the way). All possible implementations are having their own advantages and disadvantages regarding: hashCode()/equals() … Read more
How do I auto increment the primary key in a SQL Server database table? I’ve had a look through the forum but can’t see how to do this. I’ve looked at the properties but can’t see an option. I saw an answer where you go to the Identity specification property and set it to yes … Read more
Why does the following behave unexpectedly in Python? >>> a = 256 >>> b = 256 >>> a is b True # This is an expected result >>> a = 257 >>> b = 257 >>> a is b False # What happened here? Why is this False? >>> 257 is 257 True # Yet … Read more
I wanted to clarify if I understand this correctly: == is a reference comparison, i.e. both objects point to the same memory location .equals() evaluates to the comparison of values in the objects 25 s 25 In general, the answer to your question is “yes”, but… .equals(…) will only compare what it is written to … Read more
Two string variables are set to the same value. s1 == s2 always returns True, but s1 is s2 sometimes returns False. If I open my Python interpreter and do the same is comparison, it succeeds: >>> s1 = ‘text’ >>> s2 = ‘text’ >>> s1 is s2 True Why is this? 1 15
