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le0nidas/factory-function-final-approach-sealed-class.kt Secret

Last active March 8, 2020 19:50
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factory-function-final-approach-sealed-class.kt
sealed class PhoneNumber
object InvalidPhoneNumber : PhoneNumber()
data class ValidPhoneNumber(val value: String) : PhoneNumber() {
init {
require(value.isNotEmpty()) { "the number cannot be empty" }
}
}
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