Swift by example tuples 

var letters = ("a", "b")
Decomposing. 
let (first, second) = letters

print(first)                      // a
print(second)                     // b
Underscore to ignore, just like Go. 
var (a, _) = letters

print(a)                         // a
Or access values via index. 
print(letters.0)                 // a
print(letters.1)                 // b
Naming elements. 
var letters2 = (first: "a", second: "b")
print(letters2.first)            // a
print(letters2.second)           // b