exercism/go/pov/cmd/main.go

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package main
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import (
"fmt"
pov ".."
)
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func main() {
g := pov.New()
g.AddNode("sibling")
g.AddNode("x")
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g.AddArc("parent", "sibling")
g.AddArc("parent", "x")
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fmt.Println("== Change Root to child-3 ==")
g.Print("parent")
n := g.ChangeRoot("parent", "x")
fmt.Println(n.ArcList())
g.Print("x")
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}