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Same-named attributes in attrs.xml for custom view
..."?>
<resources>
<!-- common attributes to all custom text based views -->
<declare-styleable name="TextAttributes">
<attr name="text" format="string"/>
<attr name="textSize" format="dimension"/>
<attr name="textColor" format="colo...
If REST applications are supposed to be stateless, how do you manage sessions?
...ved ID as a claim. Stateless doesn’t mean you can’t something in a database. Essentially you store an ID in the database that must match the same ID in the token. To revoke the token you remove the ID from the database. No state is remembered in the service itself. Or even better you store the s...
Difference between MEAN.js and MEAN.io
...boilerplate/framework that takes "Mongo + Express + Angular + Node" as the base of the stack. You can find frameworks with this stack that use other denomination, some of them really good for RAD (Rapid Application Development) and building SPAs. Eg:
Meteor. Now with official Angular support, repr...
What is the difference between i++ and ++i?
...ue returned from both the currentValue++ and ++currentValue operations are based on the temporary and not the actual value stored in the variable at the time either operation exits.
Recall in the order of operations above, the first two steps copy the then-current value of the variable into the temp...
REST API 404: Bad URI, or Missing Resource?
...n error (404 or whatever) for any query that returns empty results. No database will do that and usually you don't want to report an empty result as an unexpected condition to the user. Example: you query your api to check if there is an appointment scheduled for the next 30 minutes. If there is non...
Android OpenGL ES and 2D
...enGLE quick! It only took a few months and had a custom coordinate system based on the Cartesian coordinate system. I was able to render 3D object no camera using Augmented Reality techniques.
I started with only programming experience, with no OpenGL experience. I used Ray Wenderlich's tutori...
How to cancel a Task in await?
...s introduced in .NET 4.0 and is largely unchanged since then) and the Task-Based Asynchronous Pattern, which provides guidelines on how to use CancellationToken with async methods.
To summarize, you pass a CancellationToken into each method that supports cancellation, and that method must check it ...
'and' (boolean) vs '&' (bitwise) - Why difference in behavior with lists vs numpy arrays?
...umPy arrays (of length > 1) have no truth value as this prevents vector-based logic confusion.
Example 4 is simply a vectorized bit and operation.
Bottom Line
If you are not dealing with arrays and are not performing math manipulations of integers, you probably want and.
If you have vectors o...
Why is the .bss segment required?
...be filled up with a lot of zeroes, increasing ROM size significantly.
RAM-based executables work similarly, though of course they have no true ROM.
Also, memset is likely some very efficient inline assembler, meaning that the startup copy-down can be executed faster.
...
Do fragments really need an empty constructor?
...g why.
If you check: https://android.googlesource.com/platform/frameworks/base/+/master/core/java/android/app/Fragment.java
You will see the instantiate(..) method in the Fragment class calls the newInstance method:
public static Fragment instantiate(Context context, String fname, @Nullable Bundl...