nsdictionary

I'm getting an NSCFDictionary returned to me and I can't figure out how to use it. I know it's of type NSCFDictionary because I printed the class and it came out as __NCSFDictionary. I can't figure out how to do anything with it. I'm just trying to hold onto it for now but can't even get that to work: NSDictionary *dict = [[NSURLCredentialStorage sharedCredentialStorage] allCredentials]; for(NSURLProtectionSpace key in [dict keyEnumerator]) { NSCFDictionary *value = [dict objectForKey:key]; } The class reference for allCredentials says its supposed to return a dictionary whose values are also

I need to serialize and deserialize objective-c objects into JSON to store in CouchDB. Do people have any example code for best practice for a general solution? I looked at a few JSON framework and they are stopped at the NSDictionary/NSArray level. i.e. A lot of framework will serialize and deserialize NSDictionary/NSArray into JSON. But I still have to do the work to convert NSDictionary into Objective-C objects. To make things more complex, my Object A can have reference to an NSArray/NSDictionary of Object Bs. My question is very similar to this question with addition of the collection

I'm curious, I currently have an NSDictionary where some values are set to an NSNull object thanks to the help of json-framework. The aim is to strip all NSNull values and replace it with an empty string. I'm sure someone has done this somewhere? No doubt it is probably a four liner and is simple, I am just far too burnt out to figure this out on my own. Thanks! Really simple: @interface NSDictionary (JRAdditions) - (NSDictionary *)dictionaryByReplacingNullsWithStrings; @end @implementation NSDictionary (JRAdditions) - (NSDictionary *)dictionaryByReplacingNullsWithStrings { const

Is there an equivalent for Swift's native Dictionary to [NSDictionary initWithObjects: forKeys:] ? Say I have two arrays with keys and values and want to put them in a dictionary. In Objective-C I'd do it like this: NSArray *keys = @[@"one", @"two", @"three"]; NSArray *values = @[@1, @2, @3]; NSDictionary *dict = [[NSDictionary alloc] initWithObjects: values forKeys: keys]; Of course I can iterate with a counter through both arrays, use a var dict: [String:Int] and add stuff step by step. But that doesn't seem to be a good solution. Using zip and enumerate are probably better ways of iterating

I mean: Is the order of keys and values in an NSDictionary always the same like how they were specified when initializing the NSDictionary? Or should I better maintain a seperate NSArray if I really need to know the order of keys? No, they are not ordered. As long as you don't add or remove any elements from the dictionary, they will remain in the same order, but as soon as you add or remove an element, the new order will be completely different. If you need the keys/values to be ordered, use an NSArray (or some other ordered data structure) instead. NSDictionary keys & values are not ordered.