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- (NSURL *)makeURLWithDirectoryPath:(NSURL *)url;
{
  return [url URLByAppendingPathComponent:@""];
}

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- (BOOL)atomicCopyItemAtURL:(NSURL *)sourceURL
                      toURL:(NSURL *)destinationURL
                      error:(NSError **)outError
{
  NSFileManager *manager = [NSFileManager defaultManager];
  
  // First copy into a temporary location where failure doesn't matter
  NSURL *tempDir = [manager URLForDirectory:NSItemReplacementDirectory
                                   inDomain:NSUserDomainMask
                          appropriateForURL:destinationURL

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- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    
    BOOL inMultipleSelectionMode = (self.tableView.editing ?
                                    self.tableView.allowsMultipleSelectionDuringEditing :
                                    self.tableView.allowsMultipleSelection);
	
    NSIndexPath *selectedRowIndexPath = [self.tableView indexPathForSelectedRow];
    if (selectedRowIndexPath && !inMultipleSelectionMode) {

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[[self managedObjectContext] processPendingChanges];
[[[self managedObjectContext] undoManager] disableUndoRegistration];
// Make your special changes to the managed object
[[self managedObjectContext] processPendingChanges];
[[[self managedObjectContext] undoManager] enableUndoRegistration];

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- (BOOL)attemptRecoveryFromPossibleCascadeDeleteRuleFailureError:(NSError *)error;
{
    // Make sure it's an unknown validation error for a managed object
    if ([error code] != NSManagedObjectValidationError) return NO;
    if (![[error domain] isEqualToString:NSCocoaErrorDomain]) return NO;
    
    NSManagedObject *object = [[error userInfo] objectForKey:NSValidationObjectErrorKey];
    if (![object isKindOfClass:[NSManagedObject class]]) return NO;
    
    NSString *key = [[error userInfo] objectForKey:NSValidationKeyErrorKey];

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- (void)layoutSubviews {
	if (self.detailTextLabel.text.length) {
		[self.contentView addSubview:self.detailTextLabel];
	}
	
	[super layoutSubviews];
}

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NSURLComponents *components = [NSURLComponents componentsWithString:input];

// Re-encode + symbols so NSURLQueryItem recognises them as spaces
components.percentEncodedQuery = [components.percentEncodedQuery
  stringByReplacingOccurrencesOfString:@"+"
  withString:@"%20"];

NSArray *items = components.queryItems;
// Enumerate and handle the items

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- (void)mergeChangesFromSaveNotification:(NSNotification *)notification
                             intoContext:(NSManagedObjectContext *)context {
	
	// NSManagedObjectContext's merge routine ignores updated objects which aren't
	// currently faulted in. To force it to notify interested clients that such
	// objects have been refreshed (e.g. NSFetchedResultsController) we need to
	// force them to be faulted in ahead of the merge
	
	NSSet *updated = [notification.userInfo objectForKey:NSUpdatedObjectsKey];
	for (NSManagedObject *anObject in updated) {

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- (void)willTurnIntoFault;
{
    [super willTurnIntoFault];
    
    if ([self observationInfo])
    {
        NSLog(@"%@ has observers:\n%@", [self objectID], [self observationInfo]);
    }
}

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NSURL *url = [NSURL URLWithString:@"http://example.com/path "];