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JPA: How to have one-to-many relation of the same Entity type
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Yes, this is possible. This is a special case of the standard bidirectional @ManyToOne/@OneTo...
Which version of PostgreSQL am I running?
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16 Answers
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ExecuteReader requires an open and available Connection. The connection's current state is Connectin
...would be smart to encapsulate ADO.NET functionality into a DB-Class(me too 10 years ago). Mostly they decide to use static/shared objects since it seems to be faster than to create a new object for any action.
That is neither a good idea in terms of peformance nor in terms of fail-safety.
Don't po...
Inheritance and Overriding __init__ in python
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The book is a bit dated with respect to subclass-superclass calling. It's also a little dated...
What does gcc's ffast-math actually do?
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edited Aug 31 '18 at 13:29
Rakete1111
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“Diff” an image using ImageMagick
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My own favorites are these two:
compare image1 image2 -compose src diff.png
compare image1 image2 -compose src diff.pdf
The only difference between the 2 commands above: the first one shows the visual difference between the two images as a PNG file, the second one as...
SQL, Postgres OIDs, What are they and why are they useful?
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OIDs basically give you a built-in id for every row, contained in a system column (as opposed ...
How do I set a ViewModel on a window in XAML using DataContext property?
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In addition to the solution that other people provided (which are good, and correct), there is...
How can I create a UIColor from a hex string?
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Difference between size_t and std::size_t
...d integer type of the result of the sizeof operator.
C Standard says in §17.7/2,
size_t which is the unsigned integer type of the result of the sizeof operator
And C++ Standard says (about cstddef header) in §18.1/3,
The contents are the same as the Standard C library header , with the ...