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func ping(x:Int)->[Text]
if x > 0
return ["ping: {x}"] ++ pong(x-1)
else
return ["ping: {x}"]
func pong(x:Int)->[Text]
if x > 0
return ["pong: {x}"] ++ ping(x-1)
else
return ["pong: {x}"]
func main()
>> ping(3)
= ["ping: 3", "pong: 2", "ping: 1", "pong: 0"]
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