guard-statement

It's trivial enough to do something like this: class Collection { init(json: [String: AnyObject]){ guard let id = json["id"] as? Int, name = json["name"] as? String else { print("Oh noes, bad JSON!") return } } } In that case we were using let to initialize local variables. However, modifying it to use class properties causes it to fail: class Collection { let id: Int let name: String init(json: [String: AnyObject]){ guard id = json["id"] as? Int, name = json["name"] as? String else { print("Oh noes, bad JSON!") return } } } It complains that let or var needs to be used but obviously that isn

Swift 2 introduced the guard keyword, which could be used to ensure that various data is configured ready to go. An example I saw on this website demonstrates an submitTapped function: func submitTapped() { guard username.text.characters.count > 0 else { return } print("All good") } I am wondering if using guard is any different than doing it the old fashioned way, using an if condition. Does it give benefits, which you could not get by using a simple check? Reading this article I noticed great benefits using Guard Here you can compare the use of guard with an example: This is the part without