quellish

[managedObjectContext performBlock:^{
	NSError	*error	= nil;

	if (![managedObjectContext save:&error]){
		[self handleError:error];
	}
}];

quellish

- (void) allPeopleInManagedObjectContext:(NSManagedObjectContext *)managedObjectContext withCompletion:(void (^)(NSArray*, NSError*))completion {
	[managedObjectContext performBlock:^{
		NSError				*error			= nil;
		NSArray				*results		= nil;
		NSFetchRequest		*fetchRequest	= nil;
		NSPredicate			*predicate		= nil;
		NSEntityDescription	*entity			= nil;

		fetchRequest = [[NSFetchRequest alloc] init];
		entity = [NSEntityDescription entityForName:@"Person" inManagedObjectContext:context];

quellish

- (void) saveManagedObjectContext:(NSManagedObjectContext *)managedObjectContext withCompletion::(void (^)(BOOL, NSError *))completio{
	managedObjectContext performBlock:^{
		NSError	*error	= nil;

		if (![managedObjectContext save:&error]){
			completion(NO, error);
		} else {
			if ([managedObjectContext parentContext] != nil){
				[self saveManagedObjectContext:[managedObjectContext parentContext] withCompletion:completion];
			} else {

quellish

- (void) fetchThingsWithCompletion:(void (^)(NSArray *, NSError *))completion{
    [context performBlock:^{
         result = [context executeFetch:...
          if (completion != nil){
              completion(result, error);
          }
    }];
}

quellish

NSEntityDescription	*entityDescription	= nil;
NSArray				*attributeNames		= nil;
NSDictionary		*mappedValues		= nil;

entityDescription = [managedObject entity];
attributeNames = [[entity attributesByName] allKeys];
mappedValues = [jsonObject dictionaryWithValuesForKeys:attributeKeys];
[managedObject setValuesForKeysWithDictionary:mappedValues];

quellish

    expression = [NSExpression expressionForFunction:@"distanceToLocation:fromLocation:" 
                    arguments:@[
                                [NSExpression expressionForConstantValue:to ], 
                                [NSExpression expressionForConstantValue:from ] 
                                ]
                ];
    result = (NSNumber *)[expression expressionValueWithObject:nil context:nil];

quellish

    predicate = [NSPredicate predicateWithFormat:@"distanceToLocation:fromLocation:(%@, %@) =< %@", 
                  toLocation, 
                  fromLocation, 
                  expectedDistance 
                ];

quellish

entityUserInfo = [entity userInfo];
reKeyedValues = [[NSMutableDictionary alloc] initWithDictionary:jsonObject];
	
for (NSString *key in keyedValues){
	if ([entityUserInfo valueForKey:key] != nil){
		[reKeyedValues setValue:[keyedValues valueForKey:key] forKey:[entityUserInfo valueForKey:key]];
		// Remove the original key
		[reKeyedValues setValue:nil forKey:key];
	}
}

quellish

        if (__dtrace_isenabled$http_cache$response_from_cache$v1() != 0){
            __dtrace_probe$http_cache$response_host_uri_status$v1$63686172202a$63686172202a$696e74(host.UTF8String, path.UTF8String, cached);
        }

quellish

#import "ProbedURLCache.h"
#import "http_cache.h"
@implementation ProbedURLCache
- (nullable NSCachedURLResponse *)cachedResponseForRequest:(NSURLRequest *)request {
    NSCachedURLResponse *result = nil;
    int                 cached  = 0;
    
    result = [super cachedResponseForRequest:request];
    if (result != nil){
        cached = 1;