23 lines
561 B
Ruby
23 lines
561 B
Ruby
# Copyright (C) 2024 Manuel Bustillo
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# frozen_string_literal: true
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module TreeNodeExtension
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def distance_to_common_ancestor(another_node)
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return 0 if self == another_node
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my_path = path_as_array
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another_path = another_node.path_as_array
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common_elements = my_path.zip(another_path)
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.take_while { |(p1, p2)| p1 == p2 }
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.count
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return nil if common_elements.zero?
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[my_path.count, another_path.count].max - common_elements
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end
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end
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Tree::TreeNode.include(TreeNodeExtension)
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