Method IndexInParent

tree/nodebase.go:149–156

Parents: IndexInParent returns our index within our parent node. It caches the last value and uses that for an optimized search so subsequent calls are typically quite fast. Returns -1 if we don't have a parent.

()

// last value and uses that for an optimized search so subsequent calls
// are typically quite fast. Returns -1 if we don't have a parent.
func (n *NodeBase) IndexInParent() int {
	if n.Parent == nil {
		return -1
	}
	idx := IndexOf(n.Parent.AsTree().Children, n.This, n.index) // very fast if index is close
	n.index = idx
	return idx
}

// ParentLevel finds a given potential parent node recursively up the
// hierarchy, returning the level above the current node that the parent was