Kotlin: Destructuring in lambda parameters

Question

Is there a way to iterate over a list of objects/pairs like so:

val list = listOf(Pair(1,2),Pair(2,3))

list.forEach { first, second ->
     first + second
}

Following doesn't work either:

list.forEach { (first, second) in it ->
         first + second
}

marstran · Accepted Answer · 2017-11-29 11:49:42Z

9

You can destructure the pair directly in the argument list. You are only missing the parenthesis in your first example.

list.forEach { (first, second) ->
  first + second
}

answered Nov 29, 2017 at 11:49

marstran

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