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JPA: what is the proper pattern for iterating over large result sets?
...37 of Java Persistence with Hibernate gives a solution using ScrollableResults, but alas it's only for Hibernate.
So it seems that using setFirstResult/setMaxResults and manual iteration really is necessary. Here's my solution using JPA:
private List<Model> getAllModelsIterable(int offset,...
Getting parts of a URL (Regex)
...o identify all parts of the URL (improved version) - code in Python ^((?P<scheme>[^:/?#]+):(?=//))?(//)?(((?P<login>[^:]+)(?::(?P<password>[^@]+)?)?@)?(?P<host>[^@/?#:]*)(?::(?P<port>\d+)?)?)?(?P<path>[^?#]*)(\?(?P<query>[^#]*))?(#(?P<fragment>.*))? c...
How to get the first element of the List or Set? [duplicate]
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This should be the accepted answer, although not too verbose, but gives the most accurate answer and works perfectly!
– Arturas M
Sep 9 '16 at 8:55
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Can I force pip to reinstall the current version?
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pip install --upgrade --force-reinstall <package>
When upgrading, reinstall all packages even if they are already up-to-date.
pip install -I <package>
pip install --ignore-installed <package>
Ignore the installed packages (reinstalling instead...
How to cast Object to its actual type?
...urate it should look like this: var myType = JsonConvert.DeserializeObject<MyType>(object.ToString());
– Coke
Jun 30 at 17:58
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Can I pass parameters by reference in Java?
...rint Goodbye are to use an explicit reference as follows:
AtomicReference<Object> ref = new AtomicReference<Object>("Hello");
mutate(ref);
System.out.println(ref.get()); //Goodbye!
private void mutate(AtomicReference<Object> ref) { ref.set("Goodbye"); }
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Simplest way to do a fire and forget method in c# 4.0
...und - that's exactly what you wanted, so we disable warning 4014.
By default, Tasks attempt to "Marshal back onto the original Thread," which means that this Task will run in the background, then attempt to return to the Thread that started it. Often fire and forget Tasks finish after the original ...
How can I conditionally require form inputs with AngularJS?
...here is a directive called ngRequired, that takes an Angular expression.
<input type='email'
name='email'
ng-model='contact.email'
placeholder='your@email.com'
ng-required='!contact.phone' />
<input type='text'
ng-model='contact.phone'
...
RAII and smart pointers in C++
...ypes of smart pointers to learn what you actually want to use.
shared_ptr<std::string> foo() {
shared_ptr<std::string> str = new std::string();
// Do cool things to or using str
return str;
}
Now, shared_ptr will count the number of references to str. For instance
shared_...
Android: alternate layout xml for landscape mode
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By default, the layouts in /res/layout are applied to both portrait and landscape.
If you have for example
/res/layout/main.xml
you can add a new folder /res/layout-land, copy main.xml into it and make the needed adjustments.
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