Alessandro Martin alessandro-martin
alessandro-martin
/ sample.swift
Created
July 9, 2017 20:37
— forked from chriseidhof/sample.swift
Observable References
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| import Foundation | |
| // A lens is a getter and a setter combined | |
| struct Lens<Whole, Part> { | |
| let get: (Whole) -> Part | |
| let set: (inout Whole, Part) -> () | |
| } | |
| // We can create a lens from a key path | |
| extension Lens { |