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How to delete all Annotations on a MKMapView
...tion = [mapView userLocation];
NSMutableArray *pins = [[NSMutableArray alloc] initWithArray:[mapView annotations]];
if ( userLocation != nil ) {
[pins removeObject:userLocation]; // avoid removing user location off the map
}
[mapView removeAnnotations:pins];
[pins releas...
What and When to use Tuple? [duplicate]
...know about the Tuple type. Tuple is a class, not a struct. It thus will be allocated upon the managed heap. Each class instance that is allocated adds to the burden of garbage collection.
Note:
The properties Item1, Item2, and further do not have setters. You cannot assign them. The Tuple is immuta...
How to replace part of string by position?
.... The StringBuilder approach avoid this extra cost by working within a pre-allocated section of memory and moving chars round within it.
– redcalx
Apr 17 '18 at 15:52
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How much is the overhead of smart pointers compared to normal pointers in C++?
...
shared_ptr has a significant overhead for creation because of it's memory allocation for the control block (which keeps the ref counter and a pointer list to all weak references). It has also a huge memory overhead because of this and the fact that std::shared_ptr is always a 2 pointer tuple (one t...
Is a memory leak created if a MemoryStream in .NET is not closed?
...AK and how much LATER you mean...
If by leak you mean "the memory remains allocated, unavailable for use, even though you're done using it" and by latter you mean anytime after calling dispose, then then yes there may be a leak, although its not permanent (i.e. for the life of your applications run...
How do I set up NSZombieEnabled in Xcode 4?
... know which one:
With zombies: -[UITableView release]: message sent to deallocated instance
Without zombies:
This Xcode setting is ignored when you archive the application for App Store submission. You don't need to touch anything before releasing your application.
Pressing ⌥⌘R is the...
MySQL maximum memory usage
...5-8 so called important settings. First off, not all of them matter - e.g. allocating a lot of resources to InnoDB and not using InnoDB doesn't make a lot of sense because those resources are wasted.
Or - a lot of people suggest to up the max_connection variable -- well, little do they know it also...
Can I use Objective-C blocks as properties?
... @CharlieMonroe - Yes you are probably right, but dont you need a dealloc implementation to nil or release the block property without ARC? (its been a while since I used non-ARC)
– Robert
Mar 31 '13 at 21:58
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What does string::npos mean in this code?
...rison with string::npos might not work.
size_type, which is defined by the allocator of the string, must be an unsigned
integral type. The default allocator, allocator, uses type size_t as size_type. Because -1 is
converted into an unsigned integral type, npos is the maximum unsigned value of its ty...
C compile error: “Variable-sized object may not be initialized”
...
I can use for this purpose malloc as well, what about the second question, I wrote it after Pavel's reply
– helloWorld
Jun 21 '10 at 8:10
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