Question

How to filter a list in Kotlin

Answer 1

fun main() {
    val numbers = listOf(1, 2, 3, 4, 5, 6, 7, 8)

	val evenNumbers = numbers.filter { it % 2 == 0 }

	println(evenNumbers) 
}

   
      
/*
run:

[2, 4, 6, 8]
  
*/

 

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Answer 2

fun isEven(number: Int): Boolean {
    return number % 2 == 0
}

fun main() {
	val numbers = listOf(1, 2, 3, 4, 5, 6, 7, 8)

	val evenNumbers = numbers.filter(::isEven)

	println(evenNumbers)
}

   
      
/*
run:

[2, 4, 6, 8]
  
*/

 

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Answer 3

fun main() {
	val numbers = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
	
    val filteredNumbers = numbers.filter { it % 2 == 0 && it > 5 }
	
    println(filteredNumbers) 

}

   
      
/*
run:

[6, 8, 10]
  
*/

 

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