IPhone CoreData: How can I track/observe all changes within a subgraph?

You will want to listen for the NSManagedObjectContextObjectsDidChangeNotification to pick up all changes to your data model. This can be done using code like the following: NSNotificationCenter defaultCenter addObserver:self selector:@selector(handleDataModelChange:) name:NSManagedObjectContextObjectsDidChangeNotification object:myManagedObjectContext which will trigger handleDataModelChange: on any changes to the myManagedObjectContext context Your handleModelDataChange : method would look something like this: (void)handleDataModelChange:(NSNotification *)note; { NSSet *updatedObjects = note userInfo objectForKey:NSUpdatedObjectsKey; NSSet *deletedObjects = note userInfo objectForKey:NSDeletedObjectsKey; NSSet *insertedObjects = note userInfo objectForKey:NSInsertedObjectsKey; // Do something in response to this } As you can see, the notification contains information on which managed objects were updated, deleted, and inserted. From that information, you should be able to act in response to your data model changes.

You will want to listen for the NSManagedObjectContextObjectsDidChangeNotification to pick up all changes to your data model. This can be done using code like the following: NSNotificationCenter defaultCenter addObserver:self selector:@selector(handleDataModelChange:) name:NSManagedObjectContextObjectsDidChangeNotification object:myManagedObjectContext; which will trigger -handleDataModelChange: on any changes to the myManagedObjectContext context. Your -handleModelDataChange: method would look something like this: - (void)handleDataModelChange:(NSNotification *)note; { NSSet *updatedObjects = note userInfo objectForKey:NSUpdatedObjectsKey; NSSet *deletedObjects = note userInfo objectForKey:NSDeletedObjectsKey; NSSet *insertedObjects = note userInfo objectForKey:NSInsertedObjectsKey; // Do something in response to this } As you can see, the notification contains information on which managed objects were updated, deleted, and inserted.

From that information, you should be able to act in response to your data model changes.

Thanks! I wasn't aware of that notification. It still seems like massive overkill to have to perform a search each time the notification is sent.

That said, I'm not sure how it could be optimized even by Apple; fundamentally, it's still a graph traversal. – D Carney Mar 19 '10 at 16:23 2 If you use an NSPredicate to filter through these objects it is actually quite performant because everything is in memory. I use this solution in several applications for the iPhone and there has yet to be a performance bottleneck in this area.

– Marcus S. Zarra Mar 24 '10 at 14:34 Ah, good call on using an NSPredicate. Hadn't thought of that.

– D Carney Mar 24 '10 at 18:42 1 You can also use notification NSManagedObjectContextDidSaveNotification to filter the changes after each save to the context. – krasnyk May 4 '10 at 8:57 2 You didn't mention this, but I want to point out for clarity that you can not issue a save to the object using this notification. It is posted during processPendingChanges, after the changes have been processed, but before it is safe to call save:.

– Answerbot Nov 4 '10 at 14:30.

What I'd like to do is watch a top-level object to be notified of any changes to any of its properties, associations, or the properties/associations of any of the objects it contains. Using the context's 'hasChanges' doesn't give me enough granularity. The objects 'isUpdated' method only applies to the given object (and not anything in its associations).

Is there a convenient (perhaps, KVO-based) was I can observe changes in a context that are limited to a subgraph?

Yes, it is possible. In china, we use fefion. Fefion can send SMS by computer.

Lots of free cell phone tracking services have been created that allow you to find friends and family—with their cooperation. One of the best known mapping programs is Google Latitude, which uses tower signals and other data to track the location to the phone or computer of approved contacts, even from a mobile phone that does not have GPS tracking. Other similar map-based locator apps (most of which rely on GPS) include Mologogo, Buddyway and Instamapper.

These programs may be limited to certain types of phones or networks, so you'll have to experiment to see which ones are the best. But if you’re looking for a free option, this is one of your best bets. Use the IMEI number.

If you need to trace a cell phone that's been misplaced or stolen, instead of using GPS or a software tracking program, you may be able to use the IMEI (International Mobile Equipment Identity) number, a 16-digit code that is unique to your phone. To find the IMEI, dial *#06#, then record the number in a safe place so that you can track it later. This is another free option.

To put music on you psp you have to enable the wifi setting on your psp. Then go online and find the music you want on the psp, then download the songs.

Putting your favorite music on the PSP is very simple. You just need to have a “Music” folder on your memory card, you can get the all the proper folders by formatting the PSP or you can just as easily create a “Music” folder using you computer. If you do format remember to back up any important files, you can do this by dragging them on to the desktop computer.

Another thing you need is a usb cable to connect the PSP to your computer, you can buy them anywhere that carries PSP. I use my old camcorder usb cable to do the job. Open the Music folder by clicking it.

Music that you put on the Psp can be in a folder, but the music cannot be in another folder within that folder (sub-folder). If that makes any sense. Not all music formats can play on the Psp but most will.

Here are the supported formats. Enjoy listening to music from the PSP.

One quart is thirty two ounces. This measurement is used for liquids like milk, fruit juices, motor oil. It also is used in packing strawberries and other fruits.

Ice cream comes in quarts as well.

Only small change needed: RewriteEngine on RewriteBase / RewriteCond %{HTTP_HOST} ^(www\" rel="nofollow">www\. )? ^.

+\. Example\.com" rel="nofollow">.com. *$ RewriteRule (.*) myfolder/$1 L stripped out at the rule which tells Apache to send a Redirect header instead of proper server-side rewrite.

I just tried it, it still causes the change in address... – philly77 Oct 19 '09 at 12:33 Sorry, it was my fault, I was doing a PHP redirect with the absolute (direct) URL within that so it looked as if it was not working! Thanks! – philly77 Oct 19 '09 at 13:40.

I am trying to do a similar thing, I don't have a subfolder for every url one may enter with a subdomain, I am in need of just one particular subdomain that should point to a subfolder, so the code I have in my . Htaccess is like... RewriteEngine on RewriteBase / RewriteCond %{HTTP_HOST} ^(www\. )?

Siteone\. Mydomain\.com. *$ RewriteRule (.*) subfolderone/$1 L But this doesn't work, it says can't find the server at siteone.mydomain.Com Does it take to setup or register this virtual domain (siteone.mydomain.

Com) with my host-provider ( may be some setup to be made in their control panel or something)? Any suggestions?.

I wanted to map any subdomain to a specific folder on my toplevel domain. Sub.example.com must be mapped to example.com/someFolder (without change in the address bar). This seems to work well, except for one problem: When I go to the URL sub.example.com, the URL in the address bar changes to example.com/myfolder .

2000 pounds = 1 ton therefore 4,000 = 2 tons.

Tons to pounds conversion table shows the most common values for the quick reference. Alternatively, you may use the converter below to convert any other values. Ton is a unit of mass in different measurement systems and usually mistaken with each other.

The short ton (also known as net ton) equals to 2000 pounds and used in north america (united states and canada), the long ton (also known as weight or gross ton) is used in imperial system (UK and some of the other english speaking countries) and defined as 2240 pounds or 1016 kilograms and finally the metric ton (also known as tonne) equals to 1000 kilograms and used in metric system. The abbreviation is "T". If you are trading internationally, you must know what type of ton as a weight unit is used in that country to avoid the surprises.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.

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