FilteringFunctionsExample.kt

fun main() {
    val listOfMumbaiPeople = listOf<Person>(
        Person("John", Address("Thane", "Mumbai")),
        Person("Bob", Address("Bandra", "Mumbai"))
    )
    val listOfVadodaraPeople = listOf<Person>(
        Person("Jane", Address("Manjalpur", "Vadodara")),
        Person("Alice", Address("Akota", "Vadodara"))
    )

    val allPeople = listOf(listOfMumbaiPeople, listOfVadodaraPeople)

    val people = allPeople.flatten()
    
    // filter people from mumbai
    val peopleFromMumbai = people.filter { it.address.city == "Mumbai" }
    print("\npeopleFromMumbai = $peopleFromMumbai")
    
    // check if any person from the list id from Mumbai
    val isAnyoneFromMumbai =  people.any { it.address.city == "Mumbai" }
    print("\nisAnyoneFromMumbai = $isAnyoneFromMumbai")
    
    // check if all people from the list are from Mumbai
    val areAllFromMumbai =  people.all { it.address.city == "Mumbai" }
    print("\nareAllFromMumbai = $areAllFromMumbai")
    
    // check if none of the people from the list are from Surat
    val isNooneFromSurat =   people.all { it.address.city == "Surat" }
    print("\nisNooneFromSurat = $isNooneFromSurat")
    
    // check if there are any residents from Thane, Mumbai
    val isAnyoneFromThaneMumbai =  people.filter { it.address.city == "Mumbai" }.any { it.address.addressLine1 == "Thane" }
    print("\nisAnyoneFromThaneMumbai = $isAnyoneFromThaneMumbai")
}