Erica Sadun

Where technology meets something or other

Tuple assignments

Do you have any good examples of when it would be useful to have a tuple but be doing complicated enough stuff with them?

Here are some examples I grepped out of a local folder, including some from third parties:

var (x, y) = (7.5, 7.5)
let (controlPoint1θ, controlPoint2θ) = (dθ / 3.0, 2.0 * dθ / 3.0)
var (_, sceneWidth) = boundingNode.boundingSphere
let (vMin, vMax) = label.boundingBox
let (duration, _) = cameraController?.performFlyover(toFace: mainActor.rotation) ?? (0, 0)
struct Point { var (x, y) : (Double, Double) }

Hope that helps.

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One Comment

  • Here’s a useful one:

    var a = 1
    var b = 2

    // swap
    (a, b) = (b, a)

    print(a) // 2
    print(b) // 1