naotokui

if ((num & (num - 1)) == 0){
	// num is 2^N
} 

naotokui

NSString *hexString = "01abcd";
UInt64  value = (UInt64)strtoull([hexString UTF8String], NULL, 16);
NSLog(@"value %ld", value);

naotokui

+ (NSString *) uniqueId
{
    CFUUIDRef   uuid =  CFUUIDCreate(NULL);
    NSString    *identifier    =(NSString *)CFUUIDCreateString(NULL, uuid);
    CFRelease(uuid);
    return [identifier autorelease];
}

naotokui

// Check if Retina Display is available or not
if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)] == YES  && [[UIScreen mainScreen] scale] == 2.00){ 
            hasRetina   = YES;
}

naotokui

NSString *contents =  [webView stringByEvaluatingJavaScriptFromString: @"document.body.innerText"];

naotokui

[NSAutoreleasePool showPools]


/* Definition */
extern void _objc_autoreleasePoolPrint();

_objc_autoreleasePoolPrint();

naotokui

- (UIView *) findFirstResonder:(UIView*)root
{
  if ([root isFirstResponder]) {        
    return root;     
  }
 
  for (UIView *subView in root.subviews) {
    UIView *firstResponder = [self findFirstResonder:subView];
    if (firstResponder != nil) {
      return firstResponder;

naotokui

- (void) presentModalViewControllerInSizeYouWant
{
	float  	width 	= <width you wnat>;
	float  	height 	= <height you wnat>;

    UIViewController *viewCtl 			= [[UIViewController alloc] initWithNibName: @"UIViewController" bundle: nil];
	viewCtl.modalPresentationStyle      = UIModalPresentationFormSheet;   // set presentation style
	
	[self presentModalViewController:viewCtl animated: YES];    	// show!
	

naotokui

#import <QuartzCore/QuartzCore.h>

view.layer.masksToBounds  = YES;
view.layer.cornerRadius   = 3.0;

naotokui

auto start = std::chrono::steady_clock::now();

        // some task

auto end = std::chrono::steady_clock::now();
std::cout << "Elapsed time " << double((end-start).count())/double(std::chrono::steady_clock::period::den) << "s" << std::endl;