Adrian phronmophobic
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| import UIKit | |
| protocol Lens { | |
| associatedtype ParentType | |
| associatedtype ChildType | |
| func lget(_ parent: ParentType) -> ChildType | |
| func lset(_ parent: ParentType, _ child: ChildType) -> ParentType | |
| } |
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| import UIKit | |
| protocol LensProtocol { | |
| func lget(data: Any?) -> Any?; | |
| func lset(data: Any?, val: Any?) -> Any?; | |
| } |
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| from pprint import pprint | |
| from copy import copy | |
| class KeyLens(object): | |
| def __init__(self, key): | |
| self.key = key | |
| def lget(self, data): | |
| return data[self.key] |
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