vodamiro

fun answerToEverything(): Int {
    return 42
}

vodamiro

fun parseColor(color: String) = when (color.toLowerCase()) {
    "red" -> "#f00"
    "green" -> "#0f0"
    "blue" -> "#00f"
    else -> "#fff"
}

vodamiro

fun logException(e: Throwable, level = Log.ERROR) {
    // implementation
}

// Then you can call the method without providing the second parameter
logException(IllegalStateException("Test exception"))
logException(IllegalStateException("Test exception"), Log.WARN)

vodamiro

interface Greeter {
    fun greet() { println("Hi!") }
}

vodamiro

private const val DURATION_IN_MS = 3000L

val fadeInAnimation = AlphaAnimation(0f, 1f).apply {
    duration = DURATION_IN_MS
    interpolator = AccelerateDecelerateInterpolator()
    fillAfter = true
}

vodamiro

val answer: Int by lazy {
    computeAnswer()
}

fun computeAnswer() = 42

vodamiro

data class User(val name)

interface UserDataSource {
    fun getAllUsers(
            onSuccess: (users: List<User>) -> Unit,
            onError: (err: Throwable) -> Unit
    )
}

// class UpdateDataSourceImpl: UserDataSource { .... }

vodamiro

var max = 10
for (i in 1..max) {
  // ...
}

vodamiro

var max = 10
val range = IntRange(1, max)
for (i in range) {
  // ...
}

vodamiro

val a: Int? = 10
val b: Int = 10
val sum = a ?: 0 + b