key-value-coding

This example is contrived, but it shows my point. So, if I have an object graph like the following: { sex = male; uid = 637650940; work = ({ employer = { id = 116420715044499; name = "Software Engineer"; }; "end_date" = "0000-00"; "start_date" = "0000-00"; }, { employer = { id = 188733137832278; name = "Apple"; }; }); }, //Some more objects (This is an NSArray containing NSDictionarys that have an object of type NSArray). The key field is work . I want a Key Path that will take the first object in the work array. If I do this: NSArray* work = [outerArrayObject objectForKey: @"work"]; id name =

I want to use valueForKeyPath on my NSDictionary , but the problem is that one of the keys is a string that starts with the @ symbol. I have no control over the naming of the key. I'm having problems trying to create the key path as I'm getting a format exception, even when trying to escape the @ symbol: This works fine: [[[dict objectForKey:@"key1"] objectForKey:@"@specialKey"] objectForKey:@"key3"] However none of these work: [dict valueForKeyPath:@"key1.@specialKey.key3"] [dict valueForKeyPath:@"key1.@@specialKey.key3"] Any ideas? Thanks, Mike pxl you shouldn't be using @ signs with your

I'm working on a little library that lets me do some basic key value coding with objects. Say I have the following object: var data = { key1: "value1", key2: { nested1: 1, nested2: "wowza!" } }; And I have the following JavaScript function: var setData = function(path, value) { eval("data." + path + "= value;"); }; And in use: setData("key1", "updated value1"); // data.key1 == "updated value1" setData("key2.nested1", 99); // data.key2.nested1 == 99 This works, however I would like to accomplish the above without using eval . Is this possible, or is eval the best way to go? EDIT: NOTE it can be

Is there a way to directly access an inner-array of an an outer array in Objective-C? For example, a call to an external data source returns the following object: { bio = "this is the profile.bio data"; "first_name" = John; "last_name" = Doe; location = { name = "Any Town, Any State"; }; metadata = { pictures = { picture = "https://picture.mysite.com/picture.jpeg"; } } } I want to be able to access, for example, the location.name or the metadata.pictures.picture data. Dot notation, however, does not seem to work. For example: _gfbLocation = [result objectForKey:@"location.name"]; _gfbPicture =

I've read a lot about NSDecimal, NSNumber, NSNumberDecimal, CFNumber... and it begins to be a kind of jungle to me. Basically, I'm trying to create a simple model class that will handle simple computations, like this one: #import <Foundation/Foundation.h> @interface Test : NSObject { float rate; float amount; int duration; } - (float)capitalizedAmount; @end @implementation Test - (float)capitalizedAmount { return (amount*pow((1.0+rate),duration)); } @end I want to access these methods and setters with their names as strings, since I plan to have a lot of other classes like this one, and I am