Configuration DSL pattern in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a simple DSL function named config.

Kotlin

fun [1](block: Config.() -> Unit): Config {
    val config = Config()
    config.block()
    return config
}

Drag options to blanks, or click blank then click option'

Aconfig

Bconfigure

Csetup

DbuildConfig

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function name that is too generic or unrelated to configuration.

The DSL function is commonly named config to clearly indicate configuration setup.

2fill in blank

medium

Complete the code to declare a mutable property host inside the Config class.

Kotlin

class Config {
    var [1]: String = ""
}

Drag options to blanks, or click blank then click option'

Aport

Bhost

Curl

Daddress

Attempts:

3 left

💡 Hint

Common Mistakes

Using unrelated property names like port or url here.

The property host holds the hostname in the configuration.

3fill in blank

hard

Fix the error in the DSL usage by completing the code to set the port property inside the config block.

Kotlin

val conf = config {
    port = [1]
}

Drag options to blanks, or click blank then click option'

A"8080"

Bport

C8080

Dconfig.port

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning port as a string instead of an integer.

The port property is an integer, so assign it a number without quotes.

4fill in blank

hard

Fill both blanks to define the Config class with host and port properties.

Kotlin

class Config {
    var [1]: String = ""
    var [2]: Int = 0
}

Drag options to blanks, or click blank then click option'

Ahost

Burl

Cport

Daddress

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing property names or types incorrectly.

The host is a string and port is an integer property in the configuration.

5fill in blank

hard

Fill all three blanks to create a DSL function config that returns a configured Config object with host and port properties.

Kotlin

fun [1](block: Config.() -> Unit): Config {
    val config = [2]()
    config.[3]()
    return config
}

Drag options to blanks, or click blank then click option'

Aconfig

BConfig

Cblock

Dconfigure

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong function or variable names, or forgetting to call the lambda.

The function is named config, creates a Config instance, and calls the block lambda on it.