collections.kt

/**
 * https://antonioleiva.com/collection-operations-kotlin/
 */

fun main(args: Array<String>) {
    val list = listOf(1, 2, 3, 4, 5, 6)
    println(list.any { it % 2 == 0 })
    println(list.map { it + 1 })
    
    val listPair = listOf(2, 4, 6, 8, 10)
    println(listPair.all { it % 2 == 0})
    
    val listRepeat = listOf(2, 5, 2, 5, 8, 9)
    println(listRepeat.count { it == 2})
    
    val listAccumulate = listOf(2, 2, 3, 4, 1)
    println(listAccumulate.fold(0) { total, next -> total + next})
    println(listAccumulate.foldRight(0) {total, next -> total + next})
    
    println("----------------------")
    
    val listWords = listOf("hello", "hola", "hallo")
    listWords.forEach{ println(it) }
    listWords.forEachIndexed{ index, value -> println("position $index contains a $value") }
    
    val listMax = listOf(9, 9, 9, 111, 0, 0)
    val maxValue = listMax.max()
    println("max value is $maxValue")
}