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/guard let

Created September 17, 2016 18:27
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guard let
guard let json = jsonOptional as? Dictionary<String, AnyObject>,
id = json["id"] as AnyObject? as? Int,
name = json["name"] as AnyObject? as? String,
email = json["email"] as AnyObject? as? String
else { return }
let user = User(id: id, name: name, email: email)
callback(user)
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