// // represents a full name
// class FullName1(val first: String, val last: String)

// val fn1HP = FullName1("Harry", "Potter")
// val fn1HP2 = FullName1("Harry", "Potter")
// val fn1HP3 = fn1HP // aliasing: notice same memory address
// val fn1HG = FullName1("Hermione", "Granger")

// // FYI: FullName1 inherits from Any
// // https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/

// println(fn1HP)
// println(fn1HG)
// println(fn1HP3)
// println("actually same (should be true): ${ fn1HP == fn1HP }")
// println("different values (should be false): ${ fn1HP == fn1HG }")
// println("same values (should be true): ${ fn1HP == fn1HP2 }")
// println("same address (should be true): ${ fn1HP == fn1HP3 }")











// class FullName2(val first: String, val last: String) {
//     override fun toString(): String = "FullName2(first=$first, last=$last)"
// }

// val fn2HP = FullName2("Harry", "Potter")
// val fn2HP2 = FullName2("Harry", "Potter")
// val fn2HG = FullName2("Hermione", "Granger")

// println(fn2HP)
// println(fn2HG)
// println("different values (should be false): ${ fn2HP == fn2HG }")
// println("same values (should be true): ${ fn2HP == fn2HP2 }")















class FullName3(val first: String, val last: String) {
    override fun toString(): String = "FullName3(first=$first, last=$last)"
    
    override fun equals(other: Any?): Boolean {
        return (other is FullName3) && 
            (this.first == other.first) &&
            (this.last == other.last)
    }
}

val fn3HP = FullName3("Harry", "Potter")
val fn3HP2 = FullName3("Harry", "Potter")
val fn3HG = FullName3("Hermione", "Granger")

println(fn3HP)
println(fn3HG)
println("different values (should be false): ${ fn3HP == fn3HG }")
println("same values (should be true): ${ fn3HP == fn3HP2 }")