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Under what circumstances is an SqlConnection automatically enlisted in an ambient TransactionScope T
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Django dynamic model fields
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Difference between Mock / Stub / Spy in Spock test framework
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Image comparison - fast algorithm
...ers), and these are the ones you'll want to use for smart image matching. Google "keypoint extraction" and "keypoint matching" and you'll find quite a few academic papers on the subject. These days, SIFT keypoints are arguably the most popular, since they can match images under different scales, r...
How to detect when an Android app goes to the background and come back to the foreground
...fecycleOwner, see @vokilam's answer
The actual solution according to a Google I/O talk:
class YourApplication : Application() {
override fun onCreate() {
super.onCreate()
registerActivityLifecycleCallbacks(AppLifecycleTracker())
}
}
class AppLifecycleTracker : Application.Activi...
Case objects vs Enumerations in Scala
...re-load your enumeration values using the reflection API or something like Google Reflections. Non-lazy case objects give you the cleanest syntax:
trait Enum[A] {
trait Value { self: A =>
_values :+= this
}
private var _values = List.empty[A]
def values = _values
}
sealed trait Cur...
What is pseudopolynomial time? How does it differ from polynomial time?
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Why not use always android:configChanges=“keyboardHidden|orientation”?
... This answer sadly doesn't mention the main explanation from official Google documentation. The main problem is in alternative resource sets, which do not get applied for you automatically on configuration change, should you want to handle it manually. And it affects not only the Activity in qu...
How is this fibonacci-function memoized?
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Understanding the meaning of the term and the concept - RAII (Resource Acquisition is Initialization
...ays. Using the tag syntax ("[topic]") is very helpful, and many people use google...
– dmckee --- ex-moderator kitten
Apr 3 '09 at 18:19
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