Distributed actors overview in Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a distributed actor named Logger.

Swift

distributed [1] Logger {
    distributed func log(message: String) async
}

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Aclass

Bactor

Cstruct

Denum

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'class' or 'struct' instead of 'actor' to declare a distributed actor.

In Swift, distributed actors are declared using the distributed actor keywords. Here, actor is the correct keyword to define a distributed actor.

2fill in blank

medium

Complete the code to call a distributed actor's method asynchronously.

Swift

let logger = Logger()
await logger.[1](message: "Hello")

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Asend

Bprint

Clog

Dwrite

Attempts:

3 left

💡 Hint

Common Mistakes

Using method names that are not defined in the actor like 'send' or 'print'.

The method defined in the distributed actor is log(message:), so calling log is correct.

3fill in blank

hard

Fix the error in the distributed actor declaration by completing the code.

Swift

distributed actor Logger {
    distributed func log(message: String) [1]
}

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Aasync

Bthrows

Cstatic

Dmutating

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to mark distributed actor methods as async.

Distributed actor methods must be asynchronous, so the async keyword is required.

4fill in blank

hard

Fill both blanks to create a distributed actor with an initializer and a method.

Swift

distributed actor Logger {
    let id: String
    init([1]: String) {
        self.id = [2]
    }
    distributed func log(message: String) async {}
}

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Aid

Bmessage

Dself.id

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'message' as the initializer parameter instead of 'id'.

Assigning 'self.id' to 'self.id' instead of the parameter.

The initializer parameter name should be 'id' and the assignment should use the parameter 'id' to set the property.

5fill in blank

hard

Fill all three blanks to create a distributed actor with a method that returns a greeting.

Swift

distributed actor Greeter {
    let name: String
    init(name: String) {
        self.name = name
    }
    distributed func greet() async -> String {
        return "Hello, [1]!"
    }
}

let greeter = Greeter(name: "Swift")
let greeting = await greeter.[2]()
print([3])

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Aname

Bgreet

Cgreeting

Dlog

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names in the string or print statement.

Calling a method name that does not exist.

The method returns a greeting using the 'name' property. The method called is 'greet', and the printed variable is 'greeting'.