onevcat

- (NSString *)createUUID
{
  // Create universally unique identifier (object)
  CFUUIDRef uuidObject = CFUUIDCreate(kCFAllocatorDefault);
 
  // Get the string representation of CFUUID object.
  NSString *uuidStr = [(NSString *)CFUUIDCreateString(kCFAllocatorDefault, uuidObject) autorelease];
 
  // If needed, here is how to get a representation in bytes, returned as a structure
  // typedef struct {

onevcat

UIColor* UIColorFromHex(NSInteger colorInHex) {
    // colorInHex should be value like 0xFFFFFF
    return [UIColor colorWithRed:((float) ((colorInHex & 0xFF0000) >> 16)) / 0xFF
                           green:((float) ((colorInHex & 0xFF00)   >> 8))  / 0xFF 
                            blue:((float)  (colorInHex & 0xFF))            / 0xFF
                           alpha:1.0];
}

onevcat

NSURL *fileURL = [[NSBundle mainBundle] URLForResource:filename withExtension:nil];
if (fileURL != nil)
{
	SystemSoundID theSoundID;
	OSStatus error = AudioServicesCreateSystemSoundID((CFURLRef)fileURL, &theSoundID);
	if (error == kAudioServicesNoError)
		soundID = theSoundID;
}

onevcat

use Email::Find;
sub replaceEmail {
    my $data = shift @_;
    my $finder = Email::Find->new(
      sub {
          my($email, $orig_email) = @_;
          my($address) = $email->format;
          return qq|<a href="mailto:$address">$orig_email</a>|;
      }
  );

onevcat

use URI::Find;
sub replaceURL {
    my $data = shift @_;
    require URI::Find::userContentFile;
    my $finder = URI::Find::Schemeless->new(
        sub {
            my($uri, $orig_uri) = @_;
            return qq|<a href="$uri">$orig_uri</a>|;
        }
    );

onevcat

-(BOOL)isValidateEmail:(NSString *)email {
    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"; 
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex]; 
    return [emailTest evaluateWithObject:email];
}

onevcat

// Defining a block variable
BOOL (^isInputEven)(int) = ^(int input)
{
  if (input % 2 == 0)
    return YES;
  else
    return NO;
};

onevcat

// Call similar to a C function call
int x = -101;
NSLog(@"%d %@ number", x, isInputEven(x) ? @"is an even" : @"is not an even");

onevcat

float price = 1.99;

float (^finalPrice)(int) = ^(int quantity)
{
  // Notice local variable price is 
  // accessible in the block
  return quantity * price;
};

int orderQuantity = 10;

onevcat

price = .99;
NSLog(@"Ordering %d units, final price is: $%2.2f", orderQuantity, finalPrice(orderQuantity));