大约有 2,193 项符合查询结果（耗时：0.0138秒） [XML]
Asynchronous vs synchronous execution, what does it really mean? [closed]
...pt of doing two things at one time. The operating system simulates this by allocating slices of time to different threads.
Now, if you introduce multiple cores/processors into the mix, then things CAN actually happen at the same time. The operating system can allocate time to one thread on the firs...
Retain cycle on `self` with blocks
... it. And in fact, if you use blockSelf in these cases the object can get dealloc'd before you get the result back from the block and then it will crash when it tries to call it, so clearly you want self to be retained until the response comes back.
First case demonstrates when a retain cycle will ...
const char* concatenation
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what about char* result; result = calloc(strlen(one)+strlen(two)+1, sizeof(char)); and THEN the strcpy+strcat?
– luiscubal
Jan 3 '10 at 14:27
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View array in Visual Studio debugger? [duplicate]
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Are you trying to view an array with memory allocated dynamically? If not, you can view an array for C++ and C# by putting it in the watch window in the debugger, with its contents visible when you expand the array on the little (+) in the watch window by a left mouse-...
do you have kcachegrind like profiling tools for mac [closed]
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Apple supply Instruments for monitoring runtime allocation of stuff and finding leaks, Shark for explicit profiling and Guard Malloc (directly built into Xcode) for memory allocation debugging. These all come as part of the developer tools.
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Make UINavigationBar transparent
...at colorMask[6] = {222, 255, 222, 255, 222, 255};
UIImage *img = [[UIImage alloc] init];
UIImage *maskedImage = [UIImage imageWithCGImage: CGImageCreateWithMaskingColors(img.CGImage, colorMask)];
[nav.navigationBar setBackgroundImage:maskedImage forBarMetrics:UIBarMetricsDefault];
[img release];
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How to set the UITableView Section title programmatically (iPhone/iPad)?
...ion
{
UIView *sectionHeaderView;
sectionHeaderView = [[UIView alloc] initWithFrame:
CGRectMake(0, 0, tableView.frame.size.width, 120.0)];
sectionHeaderView.backgroundColor = kColor(61, 201, 247);
UILabel *headerLabel = [[UILabel alloc] initWithFra...
How to reuse an ostringstream?
...ream (and the underlying buffer) so that my app doesn't have to do as many allocations. How do I reset the object to its initial state?
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Why is char[] preferred over String for passwords?
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A common attack method is to run a process that allocates lots of memory and then scans it for left-over, useful data like passwords. The process doesn't need any magical access to another process's memory space; it just relies on other processes dying without first cleari...
Why don't structs support inheritance?
...ive on the heap and are referenced via reference pointers, but structs are allocated on the stack (unless they are boxed) or are allocated "inside" the memory occupied by a reference type on the heap.
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