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misbell/gist:97f3c840a570598270fa8e406a7c60c8

Created October 4, 2016 21:00
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Returning value from subsystem with DispatchQueue.sync - Swift 3.0 - October 4 2016
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gistfile1.txt
// pretending this is a subsystem
let holdval = HoldAValue()
var avalue: Int {
var i: Int = 0
DispatchQueue.global(qos: .userInitiated).sync {
i = holdval.anIntValue
}
return i
}
print ("\(avalue) avalue")
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