sajjadyousefnia

fun getUserNameAndState(id: Int): Pair<String?, String?> {
    require(id > 0, { "Error: id is less than 0" })
 
    val userNames: Map<Int, String> = mapOf(101 to "Chike", 102 to "Segun", 104 to "Jane")
    val userStates: Map<Int, String> = mapOf(101 to "Lagos", 102 to "Imo", 104 to "Enugu")
 
    val userName = userNames[id]
    val userState = userStates[id]
    return Pair(userName, userState)
}

sajjadyousefnia

val userNameAndStatePair: Pair<String?, String?> = getUserNameAndState(101)
println(userNameAndStatePair.first) // Chike
println(userNameAndStatePair.second) // Lagos

sajjadyousefnia

val (name, state) = getUserNameAndState(101)
println(name) // Chike
println(state) // Lagos

sajjadyousefnia

fun getUserNameStateAndAge(id: Int): Triple<String?, String?, Int> {
    require(id > 0, { "id is less than 0" })
     
    val userNames: Map<Int, String> = mapOf(101 to "Chike", 102 to "Segun", 104 to "Jane")
    val userStates: Map<Int, String> = mapOf(101 to "Lagos", 102 to "Imo", 104 to "Enugu")
     
    val userName = userNames[id]
    val userState = userStates[id]
    val userAge = 6
    return Triple(userNames[id], userStates[id], userAge)

sajjadyousefnia

package com.chikekotlin.projectx
 
fun saySomething(): String {
    return "How far?"
}

sajjadyousefnia

package com.chikekotlin.projectx.utils
 
fun checkUserStatus(): String {
    return "online"
}

sajjadyousefnia

package com.chikekotlin.projectx.utils
 
fun checkUserStatus(): String {
    return "online"
}

sajjadyousefnia

package com.chikekotlin.projectx.users
 
import com.chikekotlin.projectx.utils.checkUserStatus
 
if (checkUserStatus() == "online") {
    // do something
}

sajjadyousefnia

fun test() {
    var mood = "I am sad"

    run {
        val mood = "I am happy"
        println(mood) // I am happy
    }
    println(mood)  // I am sad
}

sajjadyousefnia

run {
        if (firstTimeView) introView else normalView
    }.show()