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JPA: How to have one-to-many relation of the same Entity type
...have children of the same type "A". Also "A" should hold it's parent if it is a child.
2 Answers
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Can I bind an array to an IN() condition?
... to bind an array of values to a placeholder using PDO. The use case here is attempting to pass an array of values for use with an IN() condition.
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Compiling C++ on remote Linux machine - “clock skew detected” warning
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That message is usually an indication that some of your files have modification times later than the current system time. Since make decides which files to compile when performing an incremental build by checking if a source files has bee...
Difference between dict.clear() and assigning {} in Python
In python, is there a difference between calling clear() and assigning {} to a dictionary? If yes, what is it?
Example:
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How to get .pem file from .key and .crt files?
...--BEGIN and you can read it in a text editor:
The file uses base64, which is readable in ASCII, not binary format. The certificate is already in PEM format. Just change the extension to .pem.
If the file is in binary:
For the server.crt, you would use
openssl x509 -inform DER -outform PEM -in se...
file_put_contents - failed to open stream: Permission denied
I am trying to write a query to a file for debugging. The file is in database/execute.php . The file I want to write to is database/queries.php .
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Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
...nt sizes, a pattern came up. Invariably, transposing a matrix of size 2^n is slower than transposing one of size 2^n+1 . For small values of n , the difference is not major.
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How should the ViewModel close the form?
I'm trying to learn WPF and the MVVM problem, but have hit a snag.
This question is similar but not quite the same as this one (handling-dialogs-in-wpf-with-mvvm) ...
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How can I restart a Java application?
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Of course it is possible to restart a Java application.
The following method shows a way to restart a Java application:
public void restartApplication()
{
final String javaBin = System.getProperty("java.home") + File.separator + "bin"...
Regular expression search replace in Sublime Text 2
...eplace with regular expressions in Sublime Text 2. The documentation on this is rather anemic. Specifically, I want to do a replace on groups, so something like converting this text:
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