CODEWITHSUNDEEP
androidkotlin
Vijayendra
Vijayendra

Reputation: 1949

Create Arraylist as parameter of a function that accepts any type in Kotlin

I am new to kotlin with Android Studio. I have written a function in kotlin which accepts an Arraylist as input and randomly shuffles it - 

fun randomize(array: ArrayList<Any>) { ... }

I want this function to accept ArrayList of any type but calling with following arguments gives type mismatch error -

val arr = ArrayList<Int>()
// ...
randomize(array = arr) // Gives Error

How can I use ArrayList that accepts any type. Thanks for your help.

Upvotes: 2

Views: 2198

Answers (1)

zsmb13
zsmb13

Reputation: 89608

You need to make your function generic, like so:

fun <T> randomize(array: ArrayList<T>) {
    // do whatever you want to your `ArrayList`
}

But if you don't have any specific way in mind for how to do the shuffling, you can just use the shuffle method of the standard library:

val arr = ArrayList<Int>()
// ...
arr.shuffle()

Upvotes: 5

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