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class StopWatch { | |
private val disposableBag = CompositeDisposable() | |
var onTick: (String) -> Unit = {} | |
var elapsedTime: Long = 0 | |
companion object { | |
const val INITIAL_VALUE = "00:00:00" | |
} | |
fun start() { |
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sealed class FList<out A> { | |
object Empty : FList<Nothing>() | |
data class Node<out A>(val head: A, val tail: FList<A>) : FList<A>() { | |
override fun toString() = | |
foldLeft("[", { acc: String, initial: A -> "$acc$initial, " }).dropLast(2) + "]" | |
} | |
companion object { | |
fun <A> of(element: A): FList<A> = Node(element, Empty) |