kwalker-git

// UserRepository interface
interface UserRepository {
    suspend fun isBiometricsOptedIn(): Boolean
}

// SessionController interface
interface SessionController {
    suspend fun biometricOptIn(): BiometricResult
    suspend fun biometricOptOut(): BiometricResult
}

kwalker-git

package com.example.codesnippetsforinterviews

class User(
    val name: String, val age: String, val address: Address, medicalRecordNumber: String,
    primaryDiagnosis: List<String>
)
class Address(
    var s1: String, var s2: String,
    var c: String, var zc: String,
    medicalRecordNumber: String, serviceArea: String

kwalker-git

private fun processSuccess(response: RefreshResponse) {
    // before 1.5
    run msgLoop@{
        response.messages.forEach { message ->
            val user = extractUserData(message)
            if (user != null) {
                logLastMessage(message.userData)
                return@msgLoop
            }
        }

kwalker-git

@JvmInline
value class PreferredFirstNameInline(private val name: String) // No overhead for PreferredFirstNameInline class unless needed for boxing

// as compared to
data class PreferredFirstName(private val name: String)

fun main() {
    // The Java code decompiled from the bytecode shows the underlying implementation.
    val inlineFirstName = PreferredFirstNameInline("fred") // Implemented by static method
    /**

kwalker-git

sealed interface NewSession {
    fun showMessage()
}
sealed interface ExistingSession

sealed class Navigation
class PreviousPage : Navigation(), ExistingSession
class NextPage : Navigation(), ExistingSession
class Home : Navigation(), NewSession {
    override fun showMessage() {}

kwalker-git

fun interface DataChangeNotifier {

    fun publishDataChange()
}

kwalker-git

fun notifyAppointmentDataChanges() {
    val notifier = DataChangeNotifier { apptDataPubSub.onNext() }
    notifier.publishDataChange()
}

kwalker-git

fun notifyAppointmentDataChangesNonFunctional() {
    val notifier = object : DataChangeNotifier {
        override fun publishDataChange() {
            apptDataPubSub.onNext()
        }
    }
    notifier.publishDataChange()
}

kwalker-git

for (proxy in proxyList) {
    when (proxy.relation) {
        (Proxy.RELATION_SELF) -> break
        (Proxy.RELATION_CHILD) -> continue
        (Proxy.RELATION_TEEN) -> {
            // Logic for teen relation
        }
    }
    // Additional processing
}

kwalker-git

PROXYLOOP@for (proxy in proxyList) {
    when (proxy.relation) {
        (Proxy.RELATION_SELF) -> break@PROXYLOOP
        (Proxy.RELATION_CHILD) -> continue@PROXYLOOP
        (Proxy.RELATION_TEEN) -> {
            // Logic for teen relation
        }
    }
    // Additional processing
}