Menu
How to remove an item from NSArray.
367
The main difference is that NSArray is for an ordered collection and NSSet is for an unordered collection. There are several articles out there that talk about the difference in speed between the two, like this one. If you're iterating through an unordered collection, NSSet is great.
The primary difference between NSArray and NSMutableArray is that a mutable array can be changed/modified after it has been allocated and initialized, whereas an immutable array, NSArray , cannot.
arrays can't contain nil.
NSArray is not mutable, that is, you cannot modify it. You should take a look at NSMutableArray. Check out the "Removing Objects" section, you'll find there many functions that allow you to remove items:
[anArray removeObjectAtIndex: index]; [anArray removeObject: item]; [anArray removeLastObject]; 
NSMutableArray *arrayThatYouCanRemoveObjects = [NSMutableArray arrayWithArray:your_array]; [arrayThatYouCanRemoveObjects removeObjectAtIndex:your_object_index]; [your_array release]; your_array = [[NSArray arrayWithArray: arrayThatYouCanRemoveObjects] retain]; that's about it
if you dont own your_array(i.e it's autoreleased) remove the release & retain messages
38
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
