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How can I return to a parent activity correctly?
... have 2 activities (A and B) in my android application and I use an intent to get from activity A to activity B. The use of parent_activity is enabled:
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How to avoid “if” chains?
... This is both semantically correct (indeed, we want ALL conditions to be true) as well as a very good programming technique (short circuit evaluation). Furthermore, this can be used in any complex situation where creating functions would mess up the code.
– Sanchises
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Why doesn't Java allow overriding of static methods?
Why is it not possible to override static methods?
22 Answers
22
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JPA EntityManager: Why use persist() over merge()?
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Either way will add an entity to a PersistenceContext, the difference is in what you do with the entity afterwards.
Persist takes an entity instance, adds it to the context and makes that instance managed (ie future updates to the entity will be tracked...
Pass data to layout that are common to all pages
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If you are required to pass the same properties to each page, then creating a base viewmodel that is used by all your view models would be wise. Your layout page can then take this base model.
If there is logic required behind this data, then t...
Where and how is the _ViewStart.cshtml layout file linked?
... the
\Views folder of your project:
The _ViewStart file can be used to define common view code that you
want to execute at the start of each View’s rendering. For example,
we could write code within our _ViewStart.cshtml file to
programmatically set the Layout property for each View ...
How to create a windows service from java app
I've just inherited a java application that needs to be installed as a service on XP and vista. It's been about 8 years since I've used windows in any form and I've never had to create a service, let alone from something like a java app (I've got a jar for the app and a single dependency jar - log4j...
What is the difference between sigaction and signal?
I was about to add an extra signal handler to an app we have here and I noticed that the author had used sigaction() to set up the other signal handlers. I was going to use signal() . To follow convention I should use sigaction() but if I was writing from scratch, which should I choose?
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Copy a stream to avoid “stream has already been operated upon or closed”
I'd like to duplicate a Java 8 stream so that I can deal with it twice. I can collect as a list and get new streams from that;
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How do I push amended commit to the remote Git repository?
...d a bit with my source code, I did my usual thing commit and then I pushed to a remote repository. But then I noticed I forgot to organize my imports in the source code. So I do the amend command to replace the previous commit:
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