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Remove elements from collection while iterating
...61-4")));
Collect and Remove
The first technique consists in collecting all the objects that we want to delete (e.g. using an enhanced for loop) and after we finish iterating, we remove all found objects.
ISBN isbn = new ISBN("0-201-63361-2");
List<Book> found = new ArrayList<Book>()...
What's a concise way to check that environment variables are set in a Unix shell script?
...is therefore in the Korn Shell, and in the POSIX shells, including specifically Bash.
It is usually documented in the shell's man page in a section called Parameter Expansion. For example, the bash manual says:
${parameter:?word}
Display Error if Null or Unset. If parameter is null or unset, the...
Creating an API for mobile applications - Authentication and Authorization
... criteria my be misguided so feel free to critique that as well). Additionally, I want the API to be the same for all platforms/applications consuming it.
...
What's the difference between identifying and non-identifying relationships?
...t make the foreign key to the parent part of the child's primary key. Formally, the "right" way to do this is to make the foreign key part of the child's primary key. But the logical relationship is that the child cannot exist without the parent.
Example: A Person has one or more phone numbers. ...
Is there a CSS parent selector?
...everybody has come to know and love from jQuery. The latest ED has removed all references to the subject indicator, and replaced it with the :has() pseudo. I don't know the exact reasons, but the CSSWG held a poll some time ago and the results must have influenced this decision. It's most likely for...
Hibernate SessionFactory vs. JPA EntityManagerFactory
...hat are not available in the EntityManager, you can obtain the session by calling:
Session session = entityManager.unwrap(Session.class);
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How to easily initialize a list of Tuples?
I love tuples . They allow you to quickly group relevant information together without having to write a struct or class for it. This is very useful while refactoring very localized code.
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What does AngularJS do better than jQuery? [closed]
...ar will
then provide you a $scope handler, which you can populate (statically
or through calls to the web server).
This is a good understanding of data-binding. I think you've got that down.
DOM Manipulation
For simple DOM manipulation, which doesnot involve data manipulation
(eg: color...
How to fetch FetchType.LAZY associations with JPA and Hibernate in a Spring Controller
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You will have to make an explicit call on the lazy collection in order to initialize it (common practice is to call .size() for this purpose). In Hibernate there is a dedicated method for this (Hibernate.initialize()), but JPA has no equivalent of that. Of cou...
try/catch + using, right syntax
...ng object creation to fail. But by wrapping an operation that could potentially fail in a try block, which allows you to pop an error message if something fails, the program now has the ability to recover and inform the user.
– Jonathan Wood
May 26 '11 at 22:12...