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How do you implement a class in C? [closed]
...s the proper class, i.e. RectangleClass *. This means you often have to do casts, but they provide handy macros do help with that, so you can always cast BASECLASS *p to SUBCLASS * using just SUBCLASS(p).
– unwind
Sep 10 '09 at 8:03
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What is a good Hash Function?
What is a good Hash function? I saw a lot of hash function and applications in my data structures courses in college, but I mostly got that it's pretty hard to make a good hash function. As a rule of thumb to avoid collisions my professor said that:
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PHP random string generator
I'm trying to create a randomized string in PHP, and I get absolutely no output with this:
59 Answers
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How to convert a string to an integer in JavaScript?
...ly coercing the string into a number. I prefer to do this explicitly,
var cast = Number("97");
This has different behavior to the parse methods (although it still ignores whitespace). It's more strict: if it doesn't understand the whole of the string than it returns NaN, so you can't use it for s...
Which UUID version to use?
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Version 1: This generates a unique ID based on a network card MAC address and a timer. These IDs are easy to predict (given one, I might be able to guess another one) and can be traced back to your network card. It's not recommended to create these.
Version 4: These are generated from random (or ps...
Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
...and Y, there will exist some other value Z such that X+Z will, if properly cast, equal Y and Y-Z will, if properly cast, equal X). If unsigned values were merely storage-location types and not intermediate-expression types (e.g. if there were no unsigned equivalent of the largest integer type, and ...
What is __stdcall?
... __stdcall Scene::ExecuteCommand(void* command)
{
return system(static_cast<char*>(command));
}
UIDevice uniqueIdentifier deprecated - What to do now?
...ght that the UIDevice uniqueIdentifier property is deprecated in iOS 5 and unavailable in iOS 7 and above. No alternative method or property appears to be available or forthcoming.
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What should I do if two libraries provide a function with the same name generating a conflict?
...ULE lib = LoadLibrary("foo.dll");
void *p = GetProcAddress(lib, "bar");
// cast p to the approriate function pointer type (fp) and call it
(*fp)(arg1, arg2...);
FreeLibrary(lib);
would get the address of a function named bar in foo.dll and call it.
I know Unix systems support similar functionalit...
What is the proper #include for the function 'sleep()'?
I am using the Big Nerd Ranch book Objective-C Programming, and it starts out by having us write in C in the first few chapters. In one of my programs it has me create, I use the sleep function. In the book it told me to put #include <stdlib.h> under the #include <stdio.h> part. This...