magdamiu

fun computeSqrt(number: Double): Double {
    if(number >= 0) {  
        return Math.sqrt(number)
    } else {  
        throw RuntimeException("No negative please")
    }
}

magdamiu

var countUsersYoungerThan30WithSubscriptions = 0
for (user in users) {
    if (user.isYoungerThan30WithSubscriptions) {
        countUsersYoungerThan30WithSubscriptions++;
    }
}

magdamiu

for (user in users) {
    if(user.subscriptions != null) {
        if (user.subscriptions.size > 0) {
            var isYoungerThan30 = user.isYoungerThan30()
            if (isYoungerThan30) {
                countUsers++
            }
        }
    }
}

magdamiu

fun parseProduct(response: Response?) = when (response?.code()){
    null -> throw ClientException("Response is null")
    200, 201 -> mapToDTO(response.body())
    in 400..499 -> throw ClientException("Invalid request")
    in 500..599 -> throw ClientException("Server error")
    else -> throw ClientException("Error ${response.code()}")
}

magdamiu

fun parseProduct(response: Response?): Product? {
    if (response == null) {
        throw ClientException("Response is null")
    }
    val code: Int = response.code()
    if (code == 200 || code == 201) {
        return mapToDTO(response.body())
    }
    if (code >= 400 && code <= 499) {
        throw ClientException("Invalid request")

magdamiu

data class GetFile(val d: String, val n: String)

val pattern = Regex("(.+)/([^/]*)")

fun files(ph: String): PathParts {
  val match = pattern.matchEntire(ph)
        ?: return PathParts("", ph)

  return PathParts(match.groupValues[1],
      match.groupValues[2])

magdamiu

data class PathParts(val directory: String, val fileName: String)

fun splitPath(path: String) =
    PathParts(
        path.substringBeforeLast('/', ""),
        path.substringAfterLast('/'))

magdamiu

class Book(val title: String?, val publishYear: Int?)

fun displayBookDetails(book: Book) {
    val title = book.title
    if (title == null)
        throw IllegalArgumentException("Title required")
    val publishYear = book.publishYear
    if (publishYear == null) return

    println("$title: $publishYear")

magdamiu

class Book(val title: String?, val publishYear: Int?)

fun displayBookDetails(book: Book) {
    val title = book.title ?: 
throw IllegalArgumentException("Title required")
    val publishYear = book.publishYear ?: return

    println("$title: $publishYear")
}

magdamiu

users.filter{ user -> user.job == Job.Developer }
    .map{ developer -> developer.birthDate.dayOfMonth }
    .filter { birthDay -> birthDay <= 10 }
    .min()