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What columns generally make good indexes?
...uppose, we have a table named buyers where the SELECT query uses indexes like below:
SELECT
buyer_id /* no need to index */
FROM buyers
WHERE first_name='Tariq' /* consider to use index */
AND last_name='Iqbal' /* consider to use index */
Since "buyer_id" is referenced in the SELECT portion, M...
What is the difference between self-types and trait subclasses?
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It is predominately used for Dependency Injection, such as in the Cake Pattern. There exists a great article covering many different forms of dependency injection in Scala, including the Cake Pattern. If you Google "Cake Pattern and Scala", you'll get many links, including presentations and v...
How do I match any character across multiple lines in a regular expression?
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Jeremy RutenJeremy Ruten
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Can I incorporate both SignalR and a RESTful API?
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Take a look at the video from this blog post. It explains exactly how you can use WebAPI with SignalR.
Essentially, Web API + SignalR integration consists in this class:
public abstract class ApiControllerWithHub<THub> ...
How to disable copy/paste from/to EditText
...ble to copy/paste text into the EditText field. I have set an onLongClickListener on each EditText so that the context menu showing copy/paste/inputmethod and other options does not show up. So the user won't be able to copy/ paste into the Edit fields.
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Static fields on a null reference in Java
...In more details, a static field evaluation, such as Primary.staticField works as follows (emphasis mine) - in your case, Primary = main.getNull():
The Primary expression is evaluated, and the result is discarded. [...]
If the field is a non-blank final field, then the result is the value of...
How to display Toast in Android?
...ront, I can handle touch events on that map. Everytime I touch, a AsyncTask is fired up, it downloads some data and makes a Toast that displays the data. Although I start the task on touch event no toast is displayed, not till I close the slider. When the slider is closed and the map is not disp...
How to access custom attributes from event object in React?
React is able to render custom attributes as described at
http://facebook.github.io/react/docs/jsx-gotchas.html :
15 Answ...
How to show loading spinner in jQuery?
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Peter Mortensen
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answered Sep 16 '08 at 1:21
nickfnickf
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Best way to repeat a character in C#
... edited Apr 13 '16 at 8:36
silkfire
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answered Jan 4 '09 at 22:00
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