Kotlin - Idiomatic way to check array contains value

Question

What's an idiomatic way to check if an array of strings contains a value in Kotlin? Just like ruby's #include?.

I thought about:

array.filter { it == "value" }.any()

Is there a better way?

Answer 1

The equivalent you are looking for is the contains operator.

array.contains("value") 

Kotlin offer an alternative infix notation for this operator:

"value" in array

It's the same function called behind the scene, but since infix notation isn't found in Java we could say that in is the most idiomatic way.

Answer 2

You could also check if the array contains an object with some specific field to compare with using any()

listOfObjects.any{ object -> object.fieldxyz == value_to_compare_here }

Answer 3

Here is code where you can find specific field in ArrayList with objects. The answer of Amar Jain helped me:

listOfObjects.any{ it.field == "value"}