val l1 = listOf<String>("A", "A", "B")
    l1.distinct() as ArrayList<String>
    println("l1 worked..!")
    
    val l2 = listOf<String>("A", "A", "A")
    l2.distinct() as ArrayList<String>

if (someModel.startDate == null) { //passed from view(form), but also used in other parts - not viable to have it initialized in single value within the class by default
    someModel.startDate = Date()
}

... or

someModel.startDate = someModel.startDate ?: Date()

java.lang.NoClassDefFoundError: kotlin/Result

assertFail

Result

<dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-stdlib-jdk8</artifactId>
            <version>${kotlin.version}</version>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-test</artifactId>
            <version>${kotlin.version}</version>
            <scope>test</scope>
        </dependency>

val results = giftCards.associate { giftcard ->
            val orderItem = orderItemsLeft.first { giftcard.value.amount == it.price }
            orderItemsLeft = orderItemsLeft.filter { it != orderItem }

            orderItem.id to OrderItemGiftCard(orderItem.id, giftcard.id, giftcard.createdAt)
        }