data class Album(val title: String, val year: Int, val chartUK: Int, val chartUS: Int, val tracks: List<Track> = listOf())

data class Track(val title: String, val durationInSeconds: Int)

val albums = listOf(
        Album("The dark side of the moon", 1973,2,1,
                listOf(Track("Speak To me",90),
                        Track("Breathe",163),
                        Track("On the run",216),
                        Track("Time",421),
                        Track("The great gig in the sky",276),
                        Track("Money",382),
                        Track("Us and them",462),
                        Track("Any color you like",205),
                        Track("Brain Damage",228),
                        Track("Eclipse",123)
                )),
        Album("The wall",1979,3,1),
        Album("Wish you were here",1975,1,1),
        Album("Animals",1977,2,3),
        Album("The piper at the gates of dawn",1967,6,131),
        Album("The final Cut",1983,1,6),
        Album("The middle",1971,3,70),
        Album("Atom heart mother",1970,1,55),
        Album("Ummagumma",1969,5,74),
        Album("More",1969,9,153))

fun main(args: Array<String>) {

    for (album in albums)
        if (album.chartUK == 1)
            println("Found - ${album.title}")

}

albums.forEach { if (it.chartUK == 1) println("Found - ${it.title}") }

val albums1 = albums
albums1.filter { it.chartUK == 1 }
albums1.forEach { println("Found - ${it.title}") }

albums.filter { it.chartUK == 1 }.forEach { println("Found - ${it.title}") }