Kotlin Basics : What are pairs and triplets

Contents
About pairs & triplets
Storing in pairs
Sample of constructing a pair
Sample of destructing a pair
Using Triple

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About pairs and triplets

• They are groups of two to three pieces of data.
• They can represent classes or pieces of data.

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Storing in pairs

• This accepts two inputs it can be anything primitive-type, non-primitive-type, objects, collections , etc..
• So basically there are two parts
• Both parts can be of different type meaning ex: one can be int and another can be string etc..

Sample of constructing a pair

private fun initiate() {
        var fullName : Pair<String,String> = Pair("Tony","Stark")
        println("My name is ${fullName.first} ${fullName.second}")

        var studentDetails : Pair<Student,Address> = Pair(Student("Tony","21"),
                                                          Address("HSR layout","Bangalore"))
        println("Super hero name is ${studentDetails.first.name} and from the place ${studentDetails.second.city}")
}

Sample of destructing a pair

private fun initiate() {
        var fullName : Pair<String,String> = Pair("Tony","Stark")
        var (firstName,lastName) = fullName
        println("My name is $firstName $lastName")
}

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Using Triple

• Using tripe is similar to pair.
• Only difference is that it can hold three types in its three placeholders.
• Destructing the triple is the same as the pair mentioned above.

 private fun initiateSecond() {
        var fullName : Triple<String,String,String> = Triple("Tony","Stark","Bangalore")
        var (firstName,lastName,place) = fullName
        println("My name is $firstName $lastName from the place $place")
}