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What's the difference between session.Merge and session.SaveOrUpdate?
I notice sometimes with my parent/child objects or many-to-many relationships, I need to call either SaveOrUpdate or Merge . Usually, when I need to call SaveOrUpdate , the exception I get on calling Merge has to do with transient objects not being saved first.
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Having both a Created and Last Updated timestamp columns in MySQL 4.0
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From the MySQL 5.5 documentation:
One TIMESTAMP column in a table can have the current timestamp as the default value for initializing the column, as the auto-update value, or both. It is not possible to have the current timestamp...
PowerShell: Setting an environment variable for a single command only
...f that is what you need to do you can do it this way:
$env:FOO = 'BAR'; ./myscript
The environment variable $env:FOO can be deleted later like so:
Remove-Item Env:\FOO
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Rails: Logging the entire stack trace of an exception
...is not thread safe. While the logger itself is thread safe. Usually I join my message in one string then log it.
– Morozov
Dec 15 '15 at 10:31
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Matplotlib 2 Subplots, 1 Colorbar
...ut I don't know how to substitute "im" with appropriate variables. Let say my scatter plots are plot1=pylib.scatter(x,y,z) and plot2=pylib.scatter(a,b,c)
– Rotail
Jul 29 '14 at 1:57
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How can one use multi threading in PHP applications
...sociated with each other, you can communicate with session variables as in my example below. With this method you can even close your browser and the concurrent process still exists on the server.
Don't forget to verify the correct session ID like this:
http://localhost/test/verifysession.php?s...
How does a debugger work?
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My understanding is that when you compile an application or DLL file, whatever it compiles to contains symbols representing the functions and the variables.
When you have a debug build, these symbols are far more detailed th...
Static member initialization in a class template
.... But I still accept sbi's because of the comment about the ODR (which was my primary concern).
– Alexandre C.
Jul 12 '10 at 16:00
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Difference between Statement and PreparedStatement
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I read your article, really good one. My question now is why anyone would use Statement?! even for a static query?!
– pedram bashiri
May 15 '18 at 18:21
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Exclude all transitive dependencies of a single dependency
...omment). Your link is relevant only for maven 3. Regardless, I've edited my answer to link to link to the more highly upvoted answer.
– whaley
Mar 17 '15 at 23:50
add a comm...