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fun main() { | |
val contact = Contact(PhoneNumber("12345")) | |
show(contact.phoneNumber) // "Phone number: 12345" | |
val contactWithInvalidPhoneNumber = Contact(PhoneNumber("")) | |
show(contactWithInvalidPhoneNumber.phoneNumber) // does not show anything | |
} | |
private fun show(phoneNumber: PhoneNumber) { | |
if (phoneNumber.value.isEmpty()) { | |
return | |
} | |
val phoneNumberScreen = PhoneNumberScreen(phoneNumber) | |
phoneNumberScreen.render() | |
} |
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