[swift-users] Tuple Member Extraction in Closure Parameters

Krzysztof Siejkowski krzysztof at siejkowski.net
Thu May 5 09:19:08 CDT 2016

A workaround is to declare two local variables:

let e = zip(a,b).reduce(0) { acc, tuple in
  let value1 = tuple.0
  let value2 = tuple.1
  return acc + value1 + value2
You can also get away with one assignment:

let ok = zip(a,b).reduce(0) { acc, tuple in
    let (value1, value2) = tuple
    return acc + value1 + value2

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