Is there a clean way to bind multiple variables to...

# getting-started

[Joakim]

Is there a clean way to bind multiple variables to a local scope? Similar to .let, but for an arbitrary number of variables and types.

"X".let { x ->
  "Y".let { y ->
    "Z".let { z ->
      println(x + y + z) // XYZ
    }
  }
}

In Clojure, the let-form lets us do it like this

(let [x "X"
      y "Y"
      z "Z"]
  (println (str x y z))) ;; "XYZ"

How would you do this in Kotlin? Could perhaps invoke .let on a hashmap with values of type Any , but at that point i’d probably just extract it to a function instead

[kenkyee]

you can use destructuring depending on where x,y,z come from. e.g.

val (x,y,z) = someArray

[Jacob]

run {
 val x = "x"
 val y = "Y"
 val z = "Z"
println(x + y + z) // XYZ
}

[Joakim]

Perfect, thanks both!

[JBordage]

Alternatively to destructuring an array, you can also destructure a Triple. (The same is true for the Pair class)

val (x, y, z) = Triple("X", "Y", "Z")

println(x + y + z) // "XYZ"
println("$x$y$z") // "XYZ", but using string interpolation

[nkiesel]

you can also combine the two:

run {
    val (x, y, z) = listOf("X", "Y", "Z")
    println(x + y + z) // XYZ
}