Swift Style

Converting to Tuples

Swift tuples offer a powerful and often overlooked styling feature in Swift. They enable you to collect related items and apply them in simultaneous statements. For example, you might consider using tuples to declare connected variables using a single line, as in the following code:

var (x, y) = (20, 50) // x: Int is 20, y: Int is 50
var (x, y): (Int, Int) = (20, 50) // ditto

This compact presentation establishes a parallel between the two symbols and provides a coherent elegance that isn’t quite matched by the alternatives:

var x: Int = 20 // fine, boring
var y: Int = 20

var x = 20, y = 20 // ditto

var x = 20; var y = 50 // a little ugly

Tuples parallelize the way you lay out assignments. ...