Is it possible to pass a method as an argument in Objective-C?
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further NSInvocation is a class for wrapping up a method calls in an object. You can set a selector (method signature), set arguments by index. You can then set a target and call invoke to trigger the call, or leave the target unset and use invokeWithTarget: in a loop of some sort to call this on many objects. I think it works a little like this: NSInvocation *inv = [[NSInvocation alloc] init];
[inv setSelector:@selector(foo:bar:)];
[inv setArgument:123 atIndex:0];
[inv setArgument:456 atIndex:1];
for (MyClass *myObj in myObjects) {
[inv invokeWithTarget:myObj];
}
-(void)fooWithMethod:(SEL)selector;
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How to pass an initializer list as a function argument?
Date : March 29 2020, 07:55 AM
wish of those help Basically, I'm looking to do something like this: , Write a wrapper, then. DWORD wait_for_multiple_objects(
std::initializer_list<HANDLE> handles,
bool wait_all = false, DWORD time = INFINITE
) {
return WaitForMultipleObjects(
handles.size(), &*handles.begin(), wait_all, time
);
}
wait_for_multiple_objects({ handle1, handle2, handle3 });
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How to pass brace enclosed initializer list as an argument?
Date : March 29 2020, 07:55 AM
should help you out This is a copy of the this post: Brace Enclosed Initializer List As Function Argument, though I am looking for a solution using only methods available in C. I am using the Windows 8 compiler. , C99 provides compound literals, which would give you what you want: WaitForMultipleObjects( 3,
(HANDLE*){hThread1, hThread2, hThread3},
FALSE,
INFINITE );
WaitForMultipleObjects( 3,
HandleList(3, hThread1, hThread2, hThread3),
FALSE,
INFINITE );
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Designated initializer and convenience initializer in objective-c and how to properly create them and tie them together
Date : March 29 2020, 07:55 AM
this one helps. I am trying to understand which should be designated initializer and which one convenience initializer. I read apple docs on that topic but i am still not sure. Does the designated initializer has to have all the values that requires for the class? For example , According to Apple Documentation, the designated initalizer /**
Convenience initializers
*/
- (id)init
{
self = [self initwithCardCount:kDefaultCardCount usingDeck:[Deck defaultDeck] cardMatchMode:kCardMatchModeDefault];
return self;
}
- (id)initWithCardCount:(NSUInteger)cardCount usingDeck:(Deck *)deck
{
self = [self initwithCardCount:cardCount usingDeck:deck cardMatchMode:kCardMatchModeDefault];
if (self) {
}
return self;
}
/**
Designated initializer
*/
- (id)initwithCardCount:(NSUInteger)cardCount usingDeck:(Deck *)deck cardMatchMode:(NSUInteger)matchMode
{
self = [super init];
if (self) {
for (int i = 0; i <= cardCount; i++) {
Card *card = [deck drawRandomCard];
if (!card) {
self = nil;
break;
}
else {
self.cards[i] = card;
}
}
// Set card match mode here:
_cardMatchMode = matchMode;
}
return self;
}
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Python (multiprocessing): How to pass a dictionary as the argument of a worker process initializer function?
Tag : python , By : OllieDoodle
Date : March 29 2020, 07:55 AM
it should still fix some issue if you look at the documentation hereyou will see the following: If initializer is not None then each worker process will
call initializer(*initargs) when it starts.
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