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When to use a Content Provider
...e 5 tables in your database, but you need to join a few of them in certain orders before using them. And make a content URI for each of these joins. You could then each use these URIs as a table :)
I suggest you go ahead with Content Provider, you'll be amazed to see how powerful it is.
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Custom Python list sorting
...d if each number contained in the string is encoded using an encoding that orders the numbers lexicographically, such as Levenshtein coding. But I consider this more as a workaround to the fact that sort doesn’t take a comparison function as argument in Python 3, and not as something that I actual...
Can modules have properties the same way that objects can?
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I would do this in order to properly inherit all the attributes of a module, and be correctly identified by isinstance()
import types
class MyModule(types.ModuleType):
@property
def y(self):
return 5
>>> a=MyModule(...
Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC?
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Remove unused imports in Android Studio
...droid Studio Build 141, Ctrl+Alt+O only optimizes for the current file. In order to optimize your entire project, you will have to follow the right+click method stated above.
– jds17
Jul 3 '15 at 0:07
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Determine if string is in list in JavaScript
...a.length;while (i--) {/*use a[i]*/} is the fastest loop method (if reverse order is acceptable).
– ErikE
Mar 12 '10 at 2:31
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ContextLoaderListener or not?
...an configure the application context the other way around as well. E.g. in order to make the OpenEntityManagerInViewFilter work. Setup the ContextLoaderListener and then configure your DispatcherServlet with:
<servlet>
<servlet-name>spring-mvc</servlet-name>
<servlet-cl...
Spring Expression Language (SpEL) with @Value: dollar vs. hash ($ vs. #)
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In order to successfully access property values using the SpEL syntax, use the format "#{'${property}'}"
– Brice Roncace
Apr 6 '16 at 20:23
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Apache Spark: The number of cores vs. the number of executors
... @zeodtr pwilmot is correct - you need 2-4 tasks MINIMUM in order to utilize the full potential of your cores. Put it this was - I usually use at least 1000 partitions for my 80 core cluster.
– samthebest
Jul 11 '14 at 16:35
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Best exception for an invalid generic type argument
...ons using ildasm/ilasm ...
... it seems like a new Exception might be in order despite the high burden of proof we justly have to meet before creating custom Exceptions. Something like InvalidTypeParameterException might be useful throughout the library (or maybe not - this is surely an edge case...