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Published on 2010-03-31T16:57:13Z
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Is there a way construct a predicate to filter by class type?
I currently loop through the array and check to the class of each object. Maybe there is a cleaner way?
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Hi there,
I've got a code snippet here that I can't make working.
NSUInteger i;
//NSMutableArray *textures = [[NSMutableArray alloc] initWithCapacity:kNumTextures];
//NSMutableArray *texturesHighlighted = [[NSMutableArray alloc] initWithCapacity:kNumTextures];
NSMutableArray *textures= [[NSMutableArray…
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I have two NSArray objects that I would like to be sorted the same. One contains NSString objects, the other custom Attribute objects. Here is what my "key" NSArray looks like:
// The master order
NSArray *stringOrder = [NSArray arrayWithObjects:@"12", @"10", @"2", nil];
The NSArray with custom…
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I have an NSMutableArray that is populated with objects of strings. For simplicity sake we'll say that the objects are a person and each person object contains information about that person.
Thus I would have an NSMutableArray that is populated with person objects:
person.firstName
person.lastName
person…
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At some point in my Application, I have an NSArray whose contents change. Those contents are shown in a UITableView. I'm trying to find a way to find the diff between the contents of before and after of the NSArray so i can pass the correct indexPaths to insertRowsAtIndexPaths:withRowAnimation: and…
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So, my second question based off of this application I'm teaching myself Objective C with. I have a Data Source class, which for now looks mostly like:
- (id) init
{
if (self = [super init]){
listNames = [[NSArray alloc] initWithObjects: @"Grocery", @"Wedding", @"History class",@"CS Class"…
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Can someone please help me with using Regex with NSPredicate?
NSString *regex = @"(?:[A-Za-z0-9])";
NSPredicate *pred = [NSPRedicate predicateWithFormat:@"SELF MATCHES %@", regex];
if ([pred evaluateWithObject:mystring])
{
//do something
}
testing the above wth mystring - qstring123 doesn't…
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Please help! I've been trying to figure this out for way too long.
I can't seem to use an NSPredicate in my fetchedResultsController method:
- (NSFetchedResultsController *)fetchedResultsController {
if (fetchedResultsController != nil) return fetchedResultsController;
NSFetchRequest *fetchRequest…
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I'm new to core data and try to get all children objects of various types with one query. Say there's an "Animal" type as parent and "Cat", "Dog" and "Bird" as children. I'd like to get both cats and dogs, but not Birds in single query returned as Animal objects. Is it possible?
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I have a NSManagedObject that contains a bID and a pID. Within the set of NSManagedObjects, I only want a subset returned and I'm struggling to find the correct NSPredicate or way to get what I need out of Core Data.
Here's my full list:
bid pid
41 0
42 41
43 0
44 0
47 41
48…
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I'm working on a project which includes some slightly more complex dynamic layout of interface elements than what I'm used to. I always feel stupid writing complex code that checks if so-and-so is close to such-and-such and in that case move it x% in some direction, etc. That's just not how programming…
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