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Dictionary+KeyPaths
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| import Foundation | |
| extension Dictionary { | |
| mutating public func setValue(val: AnyObject, forKeyPath keyPath: String) { | |
| var keys = keyPath.componentsSeparatedByString(".") | |
| guard let first = keys.first as? Key else { print("Unable to use string as key on type: \(Key.self)"); return } | |
| keys.removeAtIndex(0) | |
| if keys.isEmpty, let settable = val as? Value { | |
| self[first] = settable | |
| } else { | |
| let rejoined = ".".join(keys) | |
| var subdict: [NSObject : AnyObject] = [:] | |
| if let sub = self[first] as? [NSObject : AnyObject] { | |
| subdict = sub | |
| } | |
| subdict.setValue(val, forKeyPath: rejoined) | |
| if let settable = subdict as? Value { | |
| self[first] = settable | |
| } else { | |
| print("Unable to set value: \(subdict) to dictionary of type: \(self.dynamicType)") | |
| } | |
| } | |
| } | |
| public func valueForKeyPath<T>(keyPath: String) -> T? { | |
| var keys = keyPath.componentsSeparatedByString(".") | |
| guard let first = keys.first as? Key else { print("Unable to use string as key on type: \(Key.self)"); return nil } | |
| guard let value = self[first] as? AnyObject else { return nil } | |
| keys.removeAtIndex(0) | |
| if !keys.isEmpty, let subDict = value as? [NSObject : AnyObject] { | |
| let rejoined = ".".join(keys) | |
| return subDict.valueForKeyPath(rejoined) | |
| } | |
| return value as? T | |
| } | |
| } |
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