Lazy property delegation in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a lazy property named value initialized with 10.

Kotlin

val value by [1] { 10 }

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AlazyInit

Blazy

Cdelegate

DlazyValue

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function name that does not exist like 'delegate' or 'lazyValue'.

Forgetting to use the 'by' keyword before the lazy function.

The lazy function is used to delegate a property that is initialized only when accessed for the first time.

2fill in blank

medium

Complete the code to print the lazy property value.

Kotlin

println([1])

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Avalue

Blazy.value

Cvalue()

Dlazy()

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to call the property as a function with parentheses.

Using the delegate name instead of the property name.

Lazy properties are accessed like normal properties without parentheses.

3fill in blank

hard

Fix the error in the lazy property declaration by completing the code.

Kotlin

val number by [1] 42

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Alazy {

Blazy {}

Clazy()

Dlazy

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the value directly without curly braces.

Using parentheses without a lambda block.

The lazy function requires a lambda block to initialize the value, so you must use curly braces {}.

4fill in blank

hard

Fill both blanks to create a lazy property text initialized with "Hello" and print it.

Kotlin

val text by [1] { "Hello" }
println([2])

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Alazy

Btext()

Ctext

DlazyValue

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to call the property as a function.

Using an incorrect delegate name.

The property text is delegated by lazy and accessed directly by its name.

5fill in blank

hard

Fill all three blanks to create a lazy property count initialized with 5, print it, and then print count multiplied by 2.

Kotlin

val count by [1] { 5 }
println([2])
println([3] * 2)

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

Alazy

Bcount

DlazyValue

Attempts:

3 left

💡 Hint

Common Mistakes

Using an incorrect delegate name.

Calling the property as a function.

The property count is delegated by lazy, accessed directly to print its value and to multiply it.