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What are the mechanics of short string optimization in libc++?
... minus 2 bytes to store a short string (i.e. largest capacity() without an allocation).
On a 32 bit machine, 10 chars will fit in the short string. sizeof(string) is 12.
On a 64 bit machine, 22 chars will fit in the short string. sizeof(string) is 24.
A major design goal was to minimize sizeof(...
Adding Core Data to existing iPhone project
...dinator != nil) {
_managedObjectContext = [[NSManagedObjectContext alloc] init];
[_managedObjectContext setPersistentStoreCoordinator:coordinator];
}
return _managedObjectContext;
}
- (NSManagedObjectModel *)managedObjectModel{
if (_managedObjectModel != nil) {
r...
How to convert NSDate into unix timestamp iphone sdk?
...TimeStamp
{
NSDateFormatter *objDateformat = [[NSDateFormatter alloc] init];
[objDateformat setDateFormat:@"yyyy-MM-dd"];
NSString *strTime = [objDateformat stringFromDate:[NSDate date]];
NSString *strUTCTime = [self GetUTCDateTimeFromLocalTime:strTime];//Yo...
How can I concatenate NSAttributedStrings?
...
NSMutableAttributedString *mutableAttString = [[NSMutableAttributedString alloc] init];
NSString *plainString = // ...
NSDictionary *attributes = // ... a dictionary with your attributes.
NSAttributedString *newAttString = [[NSAttributedString alloc] initWithString:plainString attributes:attribute...
How to get the current date and time
...e();
In the words of the Javadocs for the zero-argument constructor:
Allocates a Date object and initializes it so that it represents the time at which it was allocated, measured to the nearest millisecond.
Make sure you're using java.util.Date and not java.sql.Date -- the latter doesn't hav...
Declaring variables inside or outside of a loop
...ew string in each iteration of the loop, then you could optimize things by allocating the StringBuilder outside the loop. But still, this is not an advisable practice. If you do it without a very good reason, it is a premature optimization.
– Mike Nakis
Jan 11 ...
Calling Objective-C method from C++ member function?
... : self( NULL )
{ }
MyClassImpl::~MyClassImpl( void )
{
[(id)self dealloc];
}
void MyClassImpl::init( void )
{
self = [[MyObject alloc] init];
}
int MyClassImpl::doSomethingWith( void *aParameter )
{
return [(id)self doSomethingWith:aParameter];
}
void MyClassImpl::logMyMessage...
.NET XML serialization gotchas? [closed]
...nk characters that won't deserialize properly (because of the extra buffer allocated).
http://msdn.microsoft.com/en-us/library/system.io.memorystream.getbuffer(VS.80).aspx
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How to take a screenshot programmatically on iOS
...ge*) getGLScreenshot {
NSInteger myDataLength = 320 * 480 * 4;
// allocate array and read pixels into it.
GLubyte *buffer = (GLubyte *) malloc(myDataLength);
glReadPixels(0, 0, 320, 480, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
// gl renders "upside down" so swap top to bottom into ...
How to use http.client in Node.js if there is basic authorization
... is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead
– Sourabh
Mar 22 '19 at 11:11
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