Why does the following behave unexpectedly in Python? >>> a = 256 >>> b = 256 >>> a is b True # This is an expected result >>> a = 257 >>> b = 2...
I have a table table1 in SQL server 2008 and it has records in it. I want the primary key table1_Sno column to be an auto-incrementing column. Can this be done without any data transfer or cloning ...
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 t...
I have a strange scenario in which the auto identity int column in my SQL Server 2012 database is not incrementing properly. Say I have a table which uses an int auto identity as a primary key it is ...
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 lik...
Why does CPython (no clue about other Python implementations) have the following behavior? tuple1 = () tuple2 = () ...
When playing around with the Python interpreter, I stumbled upon this conflicting case regarding the is operator: If the evaluation takes place in the function it returns True, if it is done outside...
I have a MS SQL 2005 database with a table Test with column ID. ID is an identity column. I have rows in this table and all of them have their corresponding ID autoincremented value. Now I would li...
I have Article entity in my project which have ApplicationUser property named Author. How can I get full object of currently logged ApplicationUser. While creating new article I have to set Author pro...
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, ...