Adnan9011

SingletonClass.doing()

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object SingletonClass {
    fun doing() {}
}

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val womenPerson = PersonFactory.makePerson(Gender.WOMEN)
val menPerson = PersonFactory.makePerson(Gender.MEN)

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// 1 - Declare Interface
interface Person
// 2 - Declare Classes
class Women : Person
class Men : Person
// 3 - Declare Enum
enum class Gender {WOMEN , MEN}
// 4 - Declare Abstract class
abstract class PersonFactory {
    companion object {

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val firstPerson = Person.Builder(
    name = "Bob",               //Necessary
    family = "Ras")             //Necessary
    .age(32)                    //Optional
    .email("[email protected]")  //Optional
    .phoneNumber("+19094XXX")   //Optional
    .nationalCode("09640XXXXX") //Optional
    .create()                   //Create
val secondPerson = Person.Builder(
    name = "Alis",              //Necessary

Adnan9011

class Person(
    val name:String,
    val family:String,
    val age:Int,
    val nationalCode: String?,
    val email: String?,
    val phoneNumber: String?
) {
    // 1 - Private constructor
    private constructor(builder: Builder) : this (

Adnan9011

val firstPerson = Person(
    name = "Bob",               //Necessary
    family = "Ras",             //Necessary
    age = 32,                   //Optional
    email = "[email protected]", //Optional
    phoneNumber = "+19094XXX",  //Optional
    nationalCode = "09640XXXXX" //Optional
)
val secondPerson = Person(
    name = "Alis",              //Necessary

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data class Person(
    val name:String,
    val family:String,
    val age:Int = 0,
    val nationalCode: String? = null,
    val email: String? = null,
    val phoneNumber: String? = null
)