[cocoa myNotes];

 
// Doing work to generate the SVG in the schematics view;
// At the end there was no reason to keep all these (SVGView)subviews 
// ******* Rasterize ************
// Create an image from the view
 
    UIGraphicsBeginImageContext(schematicsView.frame.size);
    [schematicsView.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
 
// Remove the SVG views to release the memory.
    for (SVGView *view in SVGReferences) 
        [view removeFromSuperview];
 
// Add the image that was created before as a subview
    [self.view addSubview:[[[UIImageView alloc] 
                            initWithImage:viewImage] autorelease]];

#import <Foundation/Foundation.h>
@interface Person : NSObject { }
@property (retain) NSString *firstName;
@property (retain) NSString *lastName;
@property int age;
@end

#import "Person.h"
@implementation Person
@synthesize age,firstName,lastName;
-(id)initWithCoder:(NSCoder*)decoder{
    if ((self = [super init])) {
        firstName = [decoder decodeObjectForKey:@"firstName"];
        lastName  = [decoder decodeObjectForKey:@"lastName"];
        age           = [decoder decodeIntForKey:@"age"];
    }
    return self;
}
-(void)encodeWithCoder:(NSCoder*)encoder{
    [encoder encodeObject:firstName forKey:@"firstName"];
    [encoder encodeObject:lastName forKey:@"lastName"];
    [encoder encodeInt:age forKey:@"age"];
}
@end

// Save method
// We initialise our object and set the values
Person* p1 = [[[Person alloc] init] autorelease];
p1.firstName = [firstNameTextField stringValue];
p1.lastName  = [lastNameTextField stringValue];
p1.age       = [ageTextField intValue];
 
// We initialise our NSMutableData
NSMutableData *sData = [[NSMutableData alloc] init];
/*And our NSKeyedArchiver initialised to encode stream and version 
information into a given mutable data object.*/
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] 
                      initForWritingWithMutableData:sData];
// Then we encode our object for a key of our choice
[archiver encodeObject:p1 forKey:@"person"];
[archiver finishEncoding];
 
// Finally we can write out the data      
[sData writeToURL:fileURL atomically:YES];

// Restore method
NSMutableData *rData = [[NSMutableData alloc]
                         initWithContentsOfURL:locationOfTheFile];
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc]
                         initForReadingWithData:rData];
 
// Initialise the object and use the unarchiver to set the values
Person* p1 = [[[Person alloc] init] autorelease];
p1 =  [unarchiver decodeObjectForKey:@"person"];
 
// set the value on the textfields
[firstNameTextField setStringValue:p1.firstName];
[lastNameTextField setStringValue:p1.lastName];
[ageTextField setStringValue:
                 [NSString stringWithFormat:@"%i",p1.age]];

@interface NSMutableArray (CPQueue)
- (void)add:(id)object;
- (id)remove;
- (id)first;
- (id)last;
@end
 
@implementation NSMutableArray (CPQueue)
- (void)add:(id)object{
    if(object) [self addObject:object];
}
 
- (id)remove{
    id theResult = nil;
    if([self count]){
        theResult = [[[self objectAtIndex:0] retain] autorelease];
        [self removeObjectAtIndex:0];
    }
    return theResult;
}
 
- (id)first{
    return [self objectAtIndex:0];
}
 
- (id)last{
    return [self lastObject];
}
@end

@interface NSMutableArray (CPStack)
- (void)push:(id)object;
- (id)pop;
- (id)top;
@end
 
@implementation NSMutableArray (CPStack)
- (void)push:(id)object{
    if(object) [self addObject:object];
}
 
- (id)pop
{
    id theResult = nil;
    if([self count])
    {
        theResult = [[[self lastObject] retain] autorelease];
        [self removeLastObject];
    }
    return theResult;
}
 
- (id)top
{
    return [self lastObject];
}
@end

[NSAnimationContext beginGrouping];
[[NSAnimationContext currentContext] setDuration:1.0f];
[[arrow animator] setFrameRotation:90]; 
[NSAnimationContext endGrouping];

SInt32 version = 0;
Gestalt( gestaltSystemVersion, &version );
BOOL snowleopard = ( version >= 0x1060 ); 
BOOL leopard = ( version >= 0x1050 ); 
 
if ( snowleopard ){   
    // some code
}
else if ( leopard ){   
    // some other code
}

-(IBAction)launchPreferences:(id)sender
{
 NSArray *paths = NSSearchPathForDirectoriesInDomains
 (NSLibraryDirectory, NSSystemDomainMask, NO);
 [[NSWorkspace sharedWorkspace] openFile:[[paths objectAtIndex:0]
   stringByAppendingPathComponent:@"PreferencePanes/Dock.prefPane"]];
}