Hi,
I have a class with a NSMutableArray as readonly property and I need
to execute an action when a new item is added to the array.
I would like:
- to use key-value observing on my NSMutableArray with the collection
accessor pattern
- to preserve the information hiding of my objects and then to ch
Yes, as already suggested by Preston, key path operators are very expressive.
Thanks for the suggestions.
Jean
On Mon, Jul 12, 2010 at 4:31 PM, Keith Duncan wrote:
>> overkill. You can get less, faster code by using a for/in loop:
>>
>> float minValue = INFINITY;
>> for(id obj in someTrips)
>>
On Mon, Jul 12, 2010 at 9:43 AM, vincent habchi wrote:
> Buongiorno :)
>
> Le 12 juil. 2010 à 09:34, Giannandrea Castaldi a écrit :
>
>> I want to use blocks to extract the min price and the max price from
>> an NSArray of trips. I've found the following way:
Hi,
I want to use blocks to extract the min price and the max price from
an NSArray of trips. I've found the following way:
float minValue = 0.0;
[someTrips enumerateObjectsUsingBlock:^(id obj, NSUInteger idx,
BOOL *stop) {
if (minValue == 0.0 || [[obj adultFinalPrice] floatValue] <
Hi,
I'm developing an application for iPhone where the persistence is
managed with CoreData. I've introduced a singleton to initialize and
manage the NSManagedObjectContext, this is how I've defined the
singleton:
static Persistence *singletonPersistence = nil;
@implementation Persistence
+ (voi
Hi,
I'm developing an atom feed reader for iPhone and I'm trying to
execute a NSFetchRequest with a NSPredicate in a test where the result
should be an array with two objects but instead is emtpy.
There are two entities: Feed (Atom feed) and Entry. In the model Entry
has a relationship with one Fee
Hi,
I would like to alloc an object and defer the initialization to
another object, is a good practice? The reason is that I can alloc
several types of objects but the init method have the same signature.
Thanks.
Jean
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