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Append an object to a list in R in amortized constant time, O(1)?
... up to about a kB per node for my applications. I hold on to large arrays, etc.
– Ana Nimbus
Feb 1 at 6:23
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What is the volatile keyword useful for?
...A is creating Singleton instance and just after creation, the CPU corrupts etc, all other threads will not be able to see the value of _instance as not null and they will believe it is still assigned null.
Why does this happen? Because reader threads are not doing any locking and until the writer...
Volatile Vs Atomic [duplicate]
...e Thread there is no problem in doing that. So if it is convenient for the CPU (i.E. batch-writing of memory), reordering in that way is very much possible.
– TwoThe
Aug 21 '17 at 7:17
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Algorithm for creating a school timetable
... classes split in sub-groups some of the time?, Is this a weekly schedule? etc.) there isn't a well known problem class which corresponds to all the scheduling problems. Maybe, the Knapsack problem has many elements of similarity with these problems at large.
A confirmation that this is both a har...
CruiseControl [.Net] vs TeamCity for continuous integration?
...e build statistics page that shows build times, unit test count, pass rate etc. is very nice. TeamCity's project home page is also very valuable.
For simple .NET projects you can just tell TeamCity where the solution is and what assemblies have tests and that is all it needs (other than source contr...
If threads share the same PID, how can they be identified?
...ad ID's are usually managed by the thread library itself (such as pthread, etc...). If the 4 threads are started they should have the same PID. The kernel itself will handle thread scheduling and such but the library is the one that is going to be managing the threads (whether they can run or not de...
What is an SDL renderer?
...lds all info about the Window itself: size, position, full screen, borders etc.
SDL_Renderer
SDL_Renderer is a struct that handles all rendering. It is tied to a SDL_Window so it can only render within that SDL_Window. It also keeps track the settings related to the rendering. There are several ...
What is a memory fence?
...
For performance gains modern CPUs often execute instructions out of order to make maximum use of the available silicon (including memory read/writes). Because the hardware enforces instructions integrity you never notice this in a single thread of execut...
What's the difference between unit, functional, acceptance, and integration tests? [closed]
...s
Access the network
Hit a database
Use the file system
Spin up a thread
etc.
Any kind of dependency that is slow / hard to understand / initialise / manipulate should be stubbed/mocked/whatevered using the appropriate techniques so you can focus on what the unit of code is doing, not what its d...
Android destroying activities, killing processes
...istent data, stop animations and other things that may be
consuming CPU, etc. Implementations of this method must be very quick
because the next activity will not be resumed until this method
returns. Followed by either onResume() if the activity returns back to
the front, or onStop() if it ...