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KOTLIN - REPLACE ARRAY ELEMENTS

How to change/replace an Item in an Array?

Let us say, we have a Array that contains three names, 'Mohan', 'John', 'Paul', 'Kriti' and 'Salim'.

And we want to replace the name 'John' with a new name 'Neal'.

Example :

fun main() {

    var arr = arrayOf("Mohan", "John", "Paul", "Kriti", "Salim")
        
    println("\nBefore replacing the second element\n")
        
    for(str in arr) {
        println(str)
    }
        
    arr[1] = "Neal"
        
    println("\nAfter replacing the second element\n")
        
    for(str in arr) {
        println(str)
    }
}

Output :

Before replacing the second element

Mohan
John
Paul
Kriti
Salim

After replacing the second element

Mohan
Neal
Paul
Kriti
Salim

So, in the above code we have created a 'Array' and initialised to the variable 'x'.

var arr = arrayOf("Mohan", "John", "Paul", "Kriti", "Salim")

Now, let us see, how the values are positioned in the Array

Now, if we see the above diagram, 'John' resides at position/index '1'. So, what we do is,just replace the position/index '1' (i.e. arr[1]) with the new name 'Neal'.

arr[1] = "Neal"

And the name 'John' gets replaced with 'Neal'.

And we get the below output,

[Mohan Neal Paul Kriti Salim]

Change/replace an Item in an Array using set() method

Let us rewrite the above example using set() method.