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What is __init__.py for?
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@DarekNędza You've got something set up incorrectly if you can't just open a Python interpreter and issue from datetime import datetime without error. That's good all the way back to version 2.3!
– Two-Bit Alchemist
May...
How to lazy load images in ListView in Android
... {
if (drawableMap.containsKey(urlString)) {
imageView.setImageDrawable(drawableMap.get(urlString));
}
final Handler handler = new Handler() {
@Override
public void handleMessage(Message message) {
imageView.setImageDrawabl...
Returning a value from thread?
...
There is no race condition, because exactly one thread sets the variable and exactly one thread reads it, and the exact order of set vs. read does not matter to the correct execution of the code (i.e. the termination condition might occur in the main thread slightly earlier or la...
Why doesn't RecyclerView have onItemClickListener()?
...tends RecyclerView.Adapter<MyAdapter.ViewHolder> {
String[] mDataset = { "Data", "In", "Adapter" };
private final PublishSubject<String> onClickSubject = PublishSubject.create();
@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
fi...
Use of Finalize/Dispose method in C#
...s a simple matter of adding a disposed flag, check it before disposing and set it after disposing. Look here for the idea. You should also check the flag before any methods of the class. Makes sense? Is it complicated?
– Jordão
Jun 21 '12 at 20:59
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entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
...services.
You can also create a single service which is responsible for a set of closely related entities, like an EmployeeCityService (which has a single context) and delegate the whole operation in your Button1_Click method to a method of this service.
...
What is an EJB, and what does it do?
...e/dependency access via injection.
The container will lookup resources and set resource references as instance fields in
the EJB: such as JNDI stored JDBC connections, JMS connections/topics/queues, other
EJBs, JTA Transactions, JPA entity manager persistence contexts, JPA entity manager
factory ...
How to pick an image from gallery (SD Card) for my app?
...tent photoPickerIntent = new Intent(Intent.ACTION_PICK);
photoPickerIntent.setType("image/*");
startActivityForResult(photoPickerIntent, SELECT_PHOTO);
Process result
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
super.onActivity...
INSERT INTO vs SELECT INTO
...y logged. SELECT INTO is minimally logged assuming proper trace flags are set.
In my experience SELECT INTO is most commonly used with intermediate data sets, like #temp tables, or to copy out an entire table like for a backup. INSERT INTO is used when you insert into an existing table with a know...
What are Long-Polling, Websockets, Server-Sent Events (SSE) and Comet?
...ctions with servers from other domains are only possible with correct CORS settings
If you want to read more, I found these very useful: (article), (article), (article), (tutorial).
HTML5 Websockets:
A client requests a webpage from a server using regular http (see HTTP above).
The client rec...