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If my interface must return Task what is the best way to have a no-operation implementation?
...sey's answer about using Task.FromResult, you can improve performance even more if you cache the already completed task since all instances of completed tasks are the same:
public static class TaskExtensions
{
public static readonly Task CompletedTask = Task.FromResult(false);
}
With TaskExte...
Difference between Fact table and Dimension table?
...ble as the case with the fact table which always has a dimension table (or more) as a parent. Also, fact tables may be aggregated, whereas Dimension tables are not aggregated. Another reason is that fact tables are not supposed to be updated in place whereas Dimension tables could be updated in plac...
C++: const reference, before vs after type-specifier
...standard.
Due to the above factors, I think const T&/const T* have way more inertia than T const&/T const*. const T&/const T* empirically seem way more common to me than T const&/T const* in all of the C++ and C code that I've seen. I think following common practices is more readabl...
Why avoid increment (“++”) and decrement (“--”) operators in JavaScript?
...'d be needlessly creating a temporary object. I find the postfix operator more aesthetically pleasing though.
– mc0e
Jan 11 '14 at 8:22
...
Should I use a data.frame or a matrix?
...he arguments of these functions determine the choice.
Also:
Matrices are more memory efficient:
m = matrix(1:4, 2, 2)
d = as.data.frame(m)
object.size(m)
# 216 bytes
object.size(d)
# 792 bytes
Matrices are a necessity if you plan to do any linear algebra-type of operations.
Data frames are mor...
Generate a random point within a circle (uniformly)
...here. That gives a direction. Now use random()+random()+random() with some more complex folding (ie. a 6-way fold of an infinitesimally thin parallelepiped to a terahedron). Not convinced this is a good method though.
– sigfpe
May 4 '11 at 17:52
...
What are some (concrete) use-cases for metaclasses?
...ractive plotting wrapper and an offscreen plotting wrapper, I found it was more efficient to do this via metaclasses, wrapping the appropriate methods, than to do something like:
class PlottingInteractive:
add_slice = wrap_pylab_newplot(add_slice)
This method doesn't keep up with API changes ...
How to use ADB Shell when Multiple Devices are connected? Fails with “error: more than one device an
...lator use adb -e shell or adb emu <command>. They'll fail if there's more than one emulator going and you'll have to fall back to -s
– Corey Ogburn
Jun 3 '16 at 20:23
1
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When to use RDLC over RDL reports?
...cessingMode.Remote'.
You can set parameters a user can see and use to gain more flexibility.
You can configure parts of a report to be used for connection strings as 'Data Sources' as well as a sql query, xml, or other datasets as a 'Dataset'. These parts and others can be stored and configured to ...