nsmutabledictionary

I started this project with a simple plist of a dictionary with two arrays of strings. I now want to add more information and want to use this plist structure: Root - Dictionary - (2 items) Standard - Array - (3 items) Item 0 - Dictionary - (4 items) Color - String - Red Rvalue - String - 255 Gvalue - String - 0 Bvalue - String - 0 Sorry about typing in the plist but the site would not let me post an image I know that the RGB values could be numbers instead of strings but I have a reason for them being strings. This is the code I used to read the simple plist: - (UITableViewCell *)tableView:

I'm storing a bunch of data in a .plist file (in the application documents folder), and it's structured like this: Dictionary { "description" = "String Value", "sections" = Array ( Array ( Number, ... Number ), Array ( Number, ... Number ) ), "items" = Array ( Array ( Number, ... Number ), Array ( Number, ... Number ) ) } If I just retrieve it with NSMutableDictionary *d = [[NSMutableDictionary alloc] initWithContentsOfFile:plistFile] I won't be able to replace the number objects, correct? So I'm recursing through the data right now and forming a mutable version of the whole thing, and it

I'm starting objective-c development and I would like to ask the best way to implement a list of keys and values. In Delphi there is the class TDictionary and I use it like this: myDictionary : TDictionary<string, Integer>; bool found = myDictionary.TryGetValue(myWord, currentValue); if (found) { myDictionary.AddOrSetValue(myWord, currentValue+1); } else { myDictionary.Add(myWord,1); } How can I do it in objective-c ? Is there equivalent functions to the above mentioned AddOrSetValue() or TryGetValue() ? Thank you. Tom Jefferys You'd want to implement your example along these lines: EDIT: /

I have an object which is in an big NSMutableDictionary, and need to find out which key this has. So I want to look up that "table" from both columns. Not only with keys, but also with objects (to get keys). Is that possible? Look to the parent class (NSDictionary) - (NSArray *)allKeysForObject:(id)anObject Which will return a NSArray of all the keys for a given Object Value. BUT it does this by sending an isEqual message to each object of the Dictionary so for your large dataset this may not be best performance. Maybe you need to hold some form of additional indexing structure structure(s) to

All objects used as keys in NS(Mutable)Dictionaries must support the NSCopying protocol, and those objects are copied when they're used in the dictionary. I frequently want to use heavier weight objects as keys, simply to map one object to another. What I really mean when I do that is effectively: [dictionary setObject:someObject forKey:[NSValue valueWithPointer:keyObject]]; ("When I come back and hand you this same key object instance again, get me that same value out.") ...which is exactly what I end up doing to get around this design sometimes. (Yes, I know about NSMapTable in desktop Cocoa

How do I loop through all objects in a NSMutableDictionary regardless of the keys? A standard way would look like this for(id key in myDict) { id value = [myDict objectForKey:key]; [value doStuff]; } you can use [myDict enumerateKeysAndObjectsUsingBlock: ^(id key, id obj, BOOL *stop) { // do something with key and obj }]; if your target OS supports blocks. You can use [dict allValues] to get an NSArray of your values. Be aware that it doesn't guarantee any order between calls. For simple loop, fast enumeration is a bit faster than block-based loop It's easier to do concurrent or reverse