Tatiana Tree Practice #19
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CheezItMan
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Sep 10, 2019
CheezItMan
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CheezItMan
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Nice work, I like how you worked through breadth first search. You made good use of helper methods and did a good job with the Big-O. I also like the tests you wrote.
| # Time Complexity: | ||
| # Space Complexity: | ||
| def bst_preorder(node, arr) | ||
| if !node |
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So if node is nil, you try to add the key & value to the list?
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| # Time Complexity: | ||
| # Space Complexity: | ||
| # Time Complexity: O(log n) - omit half of dataset to add a value if tree is balanced |
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And O(n) if the tree is not balanced.
| # Time Complexity: | ||
| # Space Complexity: | ||
| # Time Complexity: O(n) because we visit each node once | ||
| # Space Complexity: O(h) where h is equal to height of tree unless tree is imbalanced, then O(n) |
| return breadth_first(node, array) | ||
| end | ||
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| def breadth_first(node, arr) |
| # Useful for printing | ||
| def to_s | ||
| return "#{self.inorder}" | ||
| puts "#{self.inorder}" |
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Just a note, you can't test something being printed, it's easier to test a string result.
Plus you can always do: puts my_tree.to_s
| end | ||
| end | ||
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| describe "bst height" do |
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👍 BTW I'm going to swipe these for C12
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