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When to use EntityManager.find() vs EntityManager.getReference() with JPA
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So before transaction commit, JPA provider will see stateChanged flag in order to update OR NOT person entity. If no rows is updated after update statement, JPA provider will throw EntityNotFoundException according to JPA specification.
regards,
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How to set host_key_checking=false in ansible inventory file?
...al:
Ansible User Guide - Host Key Checking
You can do it either in the /etc/ansible/ansible.cfg or ~/.ansible.cfg file:
[defaults]
host_key_checking = False
Or you can setup and env variable (this might not work on newer ansible versions):
export ANSIBLE_HOST_KEY_CHECKING=False
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How can I generate UUID in C#
...t always reversing. The docs for for Guid.ToByteArray() call out the byte order as little endian, and say the constructor matches. The spec for GUID is little endian. I would think that should be independent of the machine byte order.
– Jeff Walker Code Ranger
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What is Java Servlet?
...les the networking side (e.g. parsing an HTTP request, connection handling etc). One of the best-known open source servlet containers is Tomcat.
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Stop “developer tools access needs to take control of another process for debugging to continue” ale
...alling Xcode 4.2.1 worked. However, it might be easier to just patch the /etc/authorization file with the following diff.
<key>system.privilege.taskport.debug</key>
<dict>
<key>allow-root</key>
<false/>
<ke...
Is it possible to focus on a using JavaScript focus() function?
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Yes - this is possible. In order to do it, you need to assign a tabindex...
<div tabindex="0">Hello World</div>
A tabindex of 0 will put the tag "in the natural tab order of the page". A higher number will give it a specific order of pri...
Gulp command not found after install
...ed the npm root -g was pointing to /usr/local/lib/node_modules/npm, but in order to install gulp in /usr/local/lib/node_modules, I had to use sudo:
sudo npm install gulp -g
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How can I read a large text file line by line using Java?
...les.lines(Paths.get(filename), Charset.defaultCharset())) {
lines.forEachOrdered(line -> process(line));
}
Printing all the lines in the file:
try (Stream<String> lines = Files.lines(file, Charset.defaultCharset())) {
lines.forEachOrdered(System.out::println);
}
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How do I make a WinForms app go Full Screen
..._Load(object sender, EventArgs e)
{
this.TopMost = true;
this.FormBorderStyle = FormBorderStyle.None;
this.WindowState = FormWindowState.Maximized;
}
But, interestingly, if you swap those last two lines the Taskbar remains visible. I think the sequence of these actions will be hard to ...
What is pseudopolynomial time? How does it differ from polynomial time?
...n the array, while in TSP n refers to the number of nodes in the graph. In order to standardize the definition of what "n" actually means in this context, the formal definition of time complexity defines the "size" of a problem as follows:
The size of the input to a problem is the number of bits...