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Cannot use identity column key generation with ( TABLE_PER_CLASS )

... The problem here is that you mix "table-per-class" inheritance and GenerationType.Auto. Consider an identity column in MsSQL. It is column based. In a "table-per-class" strategy you use one table per class and each one has an ID. Try: @GeneratedValue(strategy = GenerationType.T...
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What to put in a python module docstring? [closed]

Ok, so I've read both PEP 8 and PEP 257 , and I've written lots of docstrings for functions and classes, but I'm a little unsure about what should go in a module docstring. I figured, at a minimum, it should document the functions and classes that the module exports, but I've also seen a few mod...
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How does a Linux/Unix Bash script know its own PID?

I have a script in Bash called Script.sh , and it needs to know its own PID (i.e. I need to get PID inside the Script.sh ) ...
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Programmatically find the number of cores on a machine

... platform-independent way? If no such thing exists, what about determining it per-platform (Windows/*nix/Mac)? 19 Answers ...
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Open file in a relative location in Python

...y prior windows directory say 'main' , and wherever code is installed when it runs it needs to access to directory 'main/2091/data.txt' . ...
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What does the servlet value signify

I am getting a bit confused here. In our application we are having a few servlets defined. Here is the excerpt from the web.xml for one of the servlets: ...
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How do I convert a TimeSpan to a formatted string? [duplicate]

... Would TimeSpan.ToString() do the trick for you? If not, it looks like the code sample on that page describes how to do custom formatting of a TimeSpan object. share | improve this...
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Can Objective-C switch on NSString?

Is there a more intelligent way to rewrite this? 13 Answers 13 ...
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Generating UML from C++ code? [closed]

Is there a tool that can parse C++ files within a project and generate UML from it? 10 Answers ...
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How do I read the first line of a file using cat?

...follow | edited Sep 27 '19 at 15:34 Akaisteph7 3,93111 gold badge1010 silver badges3131 bronze badges ...