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    searchBar.barStyle = UIBarStyleBlackTranslucent;
    searchBar.backgroundColor = [UIColor clearColor];
    [[searchBar.subviews objectAtIndex:0] removeFromSuperview];

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- (void) enableSearchEmpty {
    UITextField *searchBarTextField = nil;
    for (UIView *subview in searchBar.subviews)
    {
        if ([subview isKindOfClass:[UITextField class]])
        {
            searchBarTextField = (UITextField *)subview;
            break;
        }
    }

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+ (NSString*) getUniqueID {
    CFUUIDRef newUniqueId = CFUUIDCreate(kCFAllocatorDefault);
    CFStringRef newUniqueIdString = CFUUIDCreateString(kCFAllocatorDefault, newUniqueId);
    NSString *uniqueId = [NSString stringWithFormat:@"%@",(NSString *)newUniqueIdString];
    CFRelease(newUniqueId);
    CFRelease(newUniqueIdString);
    
    return [[uniqueId retain] autorelease];
}

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#define ROUND_UP(N, S) ((((N) + (S) - 1) / (S)) * (S))
#import <stdlib.h>

- (CGImageRef) createMaskWithImageAlpha: (CGContextRef) originalImageContext {
    
    UInt8 *data = (UInt8 *)CGBitmapContextGetData(originalImageContext);
    
    float width = CGBitmapContextGetBytesPerRow(originalImageContext) / 4;
    float height = CGBitmapContextGetHeight(originalImageContext);
    

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data BinaryTree a = BinaryNode a (BinaryTree a) (BinaryTree a) | BinaryNullNode

instance Show a => Show (BinaryTree a) where
	show BinaryNullNode = " null"
	show (BinaryNode a l r) = " (" ++ show a ++ show l ++ show r ++ ")" 

search BinaryNullNode _ = False
search (BinaryNode a l r) v
	| v == a = True
	| v < a = search l v

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+ (void) setFont:(NSString*)fontName andFactor:(CGFloat)factor toView:(UIView*)view {
    NSArray *subviews = view.subviews;
    for (NSObject *subview in subviews) {
        if ([subview isKindOfClass:[UILabel class]]) {
            UILabel *label = (UILabel*)subview;
            [label setFont:[UIFont fontWithName:fontName size:label.font.pointSize*factor]];
        }
        if ([subview isKindOfClass:[UIView class]]) {
            [Util setFont:fontName andFactor:factor toView:(UIView*)subview];
        }

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- (void) postToTwitterPhotoAtIndexPath: (NSIndexPath*) indexPath {
    [MBProgressHUD showHUDAddedTo:self.view animated:YES];
    PFObject *photo = [self.myPhotos objectAtIndex:indexPath.row];
    // Create an account store object.
    ACAccountStore *accountStore = [[ACAccountStore alloc] init];
    
    // Create an account type that ensures Twitter accounts are retrieved.
    ACAccountType *accountType = [accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];
    
    // Request access from the user to use their Twitter accounts.

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def sumarListas(l:List[Int], m:List[Int]) : List[Int] = (l, m) match {
  case (Nil, Nil) => Nil
	case (Nil, y :: ys) => y :: sumarListas(Nil, ys)
	case (y :: ys, Nil) => y :: sumarListas(ys, Nil)
	case (x :: xs, y :: ys) => (x+y) :: sumarListas(xs, ys) 
}

def extraerImpares(l:List[Int]) : List[Int] = l match {
	case Nil => Nil
	case x :: xs => if ( x % 2 != 0) x :: extraerImpares(xs) else extraerImpares(xs)

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case class NB(e:Int, izq:NB, der:NB)

def busquedaBinaria(v:Int, a:NB) : NB = {
  if (a == null) 
		a 
	else {
		if (v == a.e) 
			NB(v,null,null)
		else {
			if (v < a.e)

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//Examen Final

//6 Oro Devuelve el elemento maximo de una lista
//e.g. maximo (List(3,4,1,2,9,11,7,5,0)) => 11

def maximoHelper(l:List[Int], max:Int) : Int = l match {
  case Nil => max
	case x :: xs => if (x > max) maximoHelper(xs, x) else maximoHelper(xs, max)
}