大约有 42,000 项符合查询结果（耗时：0.0477秒） [XML]
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?
...
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:
...
How to save a plot as image on the disk?
I plot a simple linear regression using R.
I would like to save that image as PNG or JPEG, is it possible to do it automatically? (via code)
...
JPA EntityManager: Why use persist() over merge()?
...
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
...
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 ...
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;
...
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:
...
Best way to use Google's hosted jQuery, but fall back to my hosted library on Google fail
What would be a good way to attempt to load the hosted jQuery at Google (or other Google hosted libs), but load my copy of jQuery if the Google attempt fails?
...
What is the point of interfaces in PHP?
Interfaces allow you to create code which defines the methods of classes that implement it. You cannot however add any code to those methods.
...