大约有 37,000 项符合查询结果（耗时：0.0652秒） [XML]
How do function pointers in C work?
...xt of some String class to be "hello".
By using function pointers, it is possible to emulate methods in C.
How is this accomplished?
The String class is actually a struct with a bunch of function pointers which act as a way to simulate methods. The following is a partial declaration of the String...
What's the rationale for null terminated strings?
...acters with a definite meaning). A binary file is an array of chars, but those chars don't mean anything for a human.
– BlackBear
Dec 11 '10 at 20:48
|
...
Is Disney's FastPass Valid and/or Useful Queue Theory
...isney Experience" becomes equivalent to standing in lines forever, Disney loses. Even if you don't spend a nickel while holding the FastPass, Disney and you both still win.
– Cheeso
Jun 11 '09 at 21:51
...
Does anyone have benchmarks (code & results) comparing performance of Android apps written in Xamari
I came across Xamarin claims that their Mono implementation on Android and their C# compiled apps are faster than Java code. Did anyone perform actual benchmarks on very similar Java and C# code on different Android platforms to verify such claims, could post the code and results?
...
What is the difference between a framework and a library?
...ifferent things depending the context they are used.
For example, on Mac OS X frameworks are just libraries, packed into a bundle. Within the bundle you will find an actual dynamic library (libWhatever.dylib). The difference between a bare library and the framework on Mac is that a framework can c...
Is it a good practice to use try-except-else in Python?
...ent in some of the "look-before-you-leap" constructs. For example, testing os.path.exists results in information that may be out-of-date by the time you use it. Likewise, Queue.full returns information that may be stale. The try-except-else style will produce more reliable code in these cases.
...
What are the differences between various threading synchronization options in C#?
..., that can be used to activate and suspend threads.
Mutex, Semaphores are OS-level concepts. e.g with a named mutex you could synchronize across multiple (managed) exes (ensuring that only one instance of your application is running on the machine.)
Mutex:
Unlike monitors, however, a mutex ca...
On logout, clear Activity history stack, preventing “back” button from opening logged-in-only Activi
...lication require a user to be logged-in to view. Users can log out from almost any activity. This is a requirement of the application. At any point if the user logs-out, I want to send the user to the Login Activity . At this point I want this activity to be at the bottom of the history stack so th...
Why do you have to link the math library in C?
...specified). GCC can be instructed to avoid this automatic link with the -nostdlib or -nodefaultlibs options.
The math functions in math.h have implementations in libm.so (or libm.a for static linking), and libm is not linked in by default. There are historical reasons for this libm/libc split, no...
What's the difference between “Solutions Architect” and “Applications Architect”? [closed]
...thinking has evolved considerably on this topic. I tend to live a little closer to the bleeding edge in our industry than the majority (though certainly not pushing the boundaries nearly as much as a lot of really smart people out there). I've been an architect at varying levels from application, to...