kotlin
val numbers = arrayOf(1, 2, 3, 4, 5)
val sum = numbers.reduce { acc, i -> acc + i }
kotlin
data class Student(val name: String, val age: Int)
val filteredStudents = students.stream()
.filter { it.age > 18 }
.collect(Collectors.toList())
filteredStudents.forEach { println(it.name) }
kotlin
val currentDate = LocalDate.now()
val formattedDate = currentDate.format(DateTimeFormatter.ofPattern("yyyy-MM-dd"))
kotlin
val numbers = listOf(1, 2, 3, 4, 5)
val squareSum = numbers.map { it * it }.sum()
