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JPA OneToMany not deleting child
...Rooms go too.
Aggregation is a looser kind of association and is typified by Course and Student. Delete the Course and the Student still exists (probably in other Courses).
So you need to either use vendor-specific extensions to force this behaviour (if available) or explicitly delete the child AN...
Django: How to completely uninstall a Django app?
...r and a production system. This means I don't want to execute sql commands by hand. I want it to be automated.
Goal: Remove the app and all database tables.
Step 1: empty the app, but leave it installed
remove all files from the app, except the folder "migrations"
Execute this command: manage.py...
How Does Modulus Divison Work
...ers of computer languages treat an integer with decimal part the same way (by truncating after the decimal) as well
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Choosing between qplot() and ggplot() in ggplot2 [closed]
...can produce excellent plots with limited experience. And the plot created by qplot [p <- qplot(etc)] can be modified by any of the full commands ggplot2 provides, which is handy (they are all stored the same way, no matter how they were created). So personally I use qplot for most everything, a...
How do I check if an HTML element is empty using jQuery?
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By far the most elegant solution, should be the correct answer.
– Christoffer Bubach
Sep 22 '15 at 22:32
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How to Add a Dotted Underline Beneath HTML Text
...their cursor over the element:
NOTE: The dotted border/underline is shown by default in Firefox and Opera, but IE8, Safari, and Chrome need a line of CSS:
<abbr title="Hyper Text Markup Language">HTML</abbr>
s...
How can I convert this foreach code to Parallel.ForEach?
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Foreach loop:
Iterations takes place sequentially, one by one
foreach loop is run from a single Thread.
foreach loop is defined in every framework of .NET
Execution of slow processes can be slower, as they're run serially
Process 2 can't start until 1 is done. Proce...
Get the value of checked checkbox?
...checkedValue = document.querySelector('.messageCheckbox:checked').value;
By using jQuery:
var checkedValue = $('.messageCheckbox:checked').val();
Pure javascript without jQuery:
var checkedValue = null;
var inputElements = document.getElementsByClassName('messageCheckbox');
for(var i=0; input...
Lombok added but getters and setters not recognized in Intellij IDEA
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I fixed it by ticking the "Enable annotation processing" checkbox in Settings->Compiler->Annotation Processors.
Along with this you might also need to install lombok plugin as mentioned in @X.Chen's answer for new versions of Int...
Is it possible to cast a Stream in Java 8?
... imageUploader: {
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