Method isInQueue

project_euler/problem_18/tree.go:222–229

isInQueue is a method that avoids duplicates in the tree

(nv int)

// isInQueue is a method that avoids duplicates in the tree
func (n *Tree) isInQueue(nv int) bool {
	if _, ok := n.Nodes[nv]; ok {
		return true
	}

	n.Nodes[nv] = struct{}{}
	return false
}