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How should equals and hashcode be implemented when using JPA and Hibernate
How should model class's equals and hashcode be implemented in Hibernate? What are the common pitfalls? Is the default implementation good enough for most cases? Is there any sense to use business keys?
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node.js fs.readdir recursive directory search
...ctory search using fs.readdir? I realise that we could introduce recursion and call the read directory function with the next directory to read, but am a little worried about it not being async...
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Calculate difference between two dates (number of days)?
I see that this question has been answered for Java , JavaScript , and PHP , but not C#. So, how might one calculate the number of days between two dates in C#?
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Exif manipulation library for python [closed]
...nt to check out exif-py:
Python library to extract EXIF data from tiff and jpeg files. Very easy to use - $ ./EXIF.py image.jpg
or the Python Imaging Library (PIL):
The Python Imaging Library (PIL) adds image processing capabilities to your Python interpreter. This library supports many fi...
What is the theoretical maximum number of open TCP connections that a modern Linux box can have
...a '64K' limit that is often cited, but that is per client per server port, and needs clarifying.
Each TCP/IP packet has basically four fields for addressing. These are:
source_ip source_port destination_ip destination_port
< client > < server >
Inside the...
Adding a regression line on a ggplot
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In general, to provide your own formula you should use arguments x and y that will correspond to values you provided in ggplot() - in this case x will be interpreted as x.plot and y as y.plot. More information about smoothing methods and formula you can find in help page of function stat_smo...
Do login forms need tokens against CSRF attacks?
...ube. YouTube allowed users to see a record of "their own" viewing history, and their login form was CSRF-vulnerable! So as a result, an attacker could set up an account with a password they knew, log the victim into YouTube using that account — stalking what videos the victim was watching.
There'...
Avoiding an ambiguous match exception
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Use this overload and use
returnType.GetMethod("Parse", new [] {typeof(string)})
share
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Twitter Bootstrap modal: How to remove Slide down effect
...on. Guess it's just a bad question because it's really 2 questions in one and no one has answered both questions in one answer.
– umassthrower
Apr 1 '13 at 4:28
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Generate fixed length Strings filled with whitespaces
... Java 1.5 we can use the method java.lang.String.format(String, Object...) and use printf like format.
The format string "%1$15s" do the job. Where 1$ indicates the argument index, s indicates that the argument is a String and 15 represents the minimal width of the String.
Putting it all together: ...