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Error: free(): invalid next size (fast):
... you have a memory error. You may be trying to free a pointer that wasn't allocated by malloc (or delete an object that wasn't created by new) or you may be trying to free/delete such an object more than once. You may be overflowing a buffer or otherwise writing to memory to which you shouldn't be...
What's the point of malloc(0)?
...
According to the specifications, malloc(0) will return either "a null pointer or a unique pointer that can be successfully passed to free()".
This basically lets you allocate nothing, but still pass the "artist" variable to a call to free() without worry. F...
Arrays vs Vectors: Introductory Similarities and Differences [closed]
...ze; you can't resize an array in C++ (unless it's an array of POD and it's allocated with malloc);
their size must be a compile-time constant unless they are allocated dynamically;
they take their storage space depending from the scope where you declare them;
if dynamically allocated, you must expli...
How do I get the day of the week with Foundation?
...
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:@"EEEE"];
NSLog(@"%@", [dateFormatter stringFromDate:[NSDate date]]);
outputs current day of week as a string in locale dependent on current regional settings.
To g...
Why do we not have a virtual constructor in C++?
...he second line postulates the notation new p->Base() to request dynamic allocation and default construction of another Derived object.
Notes:
the compiler must orchestrate memory allocation before calling the constructor - constructors normally support automatic (informally "stack") allocation...
iPhone SDK: what is the difference between loadView and viewDidLoad?
...re-Interface-Builder examples, is more like this:
UIView *view = [[UIView alloc] init...];
...
[view addSubview:whatever];
[view addSubview:whatever2];
...
self.view = view;
[view release];
And I don't blame you for not using IB. I've stuck with this method for all of Instapaper and find myself m...
Create tap-able “links” in the NSAttributedString of a UILabel?
...
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"String with a link" attributes:nil];
NSRange linkRange = NSMakeRange(14, 4); // for the word "link" in the string above
NSDictionary *linkAttributes = @{ NSForegroundColorAttributeName : [UIColor colo...
Arrays, heap and stack and value types
...
Your array is allocated on the heap, and the ints are not boxed.
The source of your confusion is likely because people have said that reference types are allocated on the heap, and value types are allocated on the stack. This is not an e...
iOS 7 parallax effect in my view controller
...atingMotionEffect *verticalMotionEffect =
[[UIInterpolatingMotionEffect alloc]
initWithKeyPath:@"center.y"
type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis];
verticalMotionEffect.minimumRelativeValue = @(-10);
verticalMotionEffect.maximumRelativeValue = @(10);
// Set hor...
How do I get an ISO 8601 date on iOS?
...
Use NSDateFormatter:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSLocale *enUSPOSIXLocale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
[dateFormatter setLocale:enUSPOSIXLocale];
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZZZ"];
[dateFormatter setCale...