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Calling virtual functions inside constructors
...beas other languages do actually do that. For example in Pascal, memory is allocated for the whole object first, but then only the most-derived constructor is invoked. A constructor must either contain an explicit call to its parent's constructor (which does not have to be the first action - it just...
Javascript object Vs JSON
...uotes if the key is a reserved word or if it would otherwise be an illegal token. In JSON you MUST always use double quotes on key names.
Q2 - the jsonString is a serialised version of the input object ...
Q3 - which may be deserialised to an identical looking object using JSON.parse()
...
How do I detect when someone shakes an iPhone?
...n selecting this new type instead of the base type in IB, or using it when allocating a view).
In the view controller, you want to set this view to become first responder:
- (void) viewWillAppear:(BOOL)animated
{
[shakeView becomeFirstResponder];
[super viewWillAppear:animated];
}
- (void)...
Best way to define private methods for a class in Objective-C
...
@implementation MyClass
id (^createTheObject)() = ^(){ return [[NSObject alloc] init];};
NSInteger (^addEm)(NSInteger, NSInteger) =
^(NSInteger a, NSInteger b)
{
return a + b;
};
//public methods, etc.
- (NSObject) thePublicOne
{
return createTheObject();
}
@end
I'm aware this is an ...
Working with Enums in android
...tes of RAM overhead.
Putting a single entry into a HashMap requires the allocation of an
additional
entry object that takes 32 bytes (see the previous section about
optimized data containers).
A few bytes here and there quickly add
up—app designs that are class- or object-heavy ...
Different results with Java's digest versus external utilities
...irtualization does violate the principle of least surprise and adds costs (allocation and runtime). Other operating systems manage to provide both better 32-on-64 support and better application virtualization with fewer snags/leaky abstractions (try running garbage collecting programs on Wow64, or t...
Are JavaScript strings immutable? Do I need a “string builder” in JavaScript?
...ded to the existing value of "immutableString"
The resultant value is then allocated to a new block of memory
"immutableString" object now points to the newly created memory space
Previously created memory space is now available for garbage collection.
...
Why is Linux called a monolithic kernel?
...FS, device drivers, etc) as well as core functionality (scheduling, memory allocation, etc.) are a tight knit group sharing the same space. This directly opposes a microkernel.
A microkernel prefers an approach where core functionality is isolated from system services and device drivers (which are ...
How to Sync iPhone Core Data with web server, and then push to other devices? [closed]
...ere is your server.
M3Synchronization * syncEntity = [[M3Synchronization alloc] initForClass: @"Car"
andContext: context
andServerUrl: kWebsiteUrl
...
What is the difference between List (of T) and Collection(of T)?
...ted in some discussion on why this might be. Maybe the list is better with allocating memory.
– Ray
Dec 29 '08 at 23:55
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