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March 12, 2017 01:09
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| extension Optional { | |
| func unwrap(_ f: (Wrapped) -> Void) { | |
| _ = self.map(f) | |
| } | |
| } | |
| // usage: | |
| // let username: String? | |
| // username.unwrap { user.username = $0 } // update user if username exists |
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