How to Filter Items of a Set based on a Condition in Kotlin - Step by Step Examples

How to Filter Items of a Set based on a Condition in Kotlin ?

Answer

To filter items of a set based on a condition in Kotlin, you can use the filter() function along with a predicate to selectively include items that satisfy the condition.

✐ Examples

1 Filter Even Numbers from a Set

In this example,

First, we create a set of integers named numberSet with values setOf(1, 2, 3, 4, 5, 6).
Next, we use the filter() function on numberSet to selectively include only the even numbers. We provide a lambda predicate that checks if each number is even using the modulo operator %.
We store the filtered result in a new set called evenNumbers.

Kotlin Program

fun main() {
    val numberSet = setOf(1, 2, 3, 4, 5, 6)
    val evenNumbers = numberSet.filter { it % 2 == 0 }
    println("Even numbers: $evenNumbers")
}

Output

Even numbers: [2, 4, 6]

2 Filter Strings Starting with 'A' from a Set

In this example,

First, we create a set of strings named stringSet with values setOf("Apple", "Banana", "Apricot", "Orange").
Next, we use the filter() function on stringSet to selectively include only the strings that start with the letter 'A'. We provide a lambda predicate that checks if each string starts with 'A' using the startsWith() function.
We store the filtered result in a new set called filteredStrings.

Kotlin Program

fun main() {
    val stringSet = setOf("Apple", "Banana", "Apricot", "Orange")
    val filteredStrings = stringSet.filter { it.startsWith("A") }
    println("Strings starting with 'A': $filteredStrings")
}

Output

Strings starting with 'A': [Apple, Apricot]

Summary

In this tutorial, we learned How to Filter Items of a Set based on a Condition in Kotlin language with well detailed examples.

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How to Filter Items of a Set based on a Condition in Kotlin - Step by Step Examples

How to Filter Items of a Set based on a Condition in Kotlin ?

Answer

✐ Examples

1 Filter Even Numbers from a Set

Kotlin Program

Output

2 Filter Strings Starting with 'A' from a Set

Kotlin Program

Output

Summary

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