Earth - Olga #19
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Earth - Olga #19
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CheezItMan
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May 6, 2021
CheezItMan
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CheezItMan
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Nice work Olga, I had one comment on heap_down and some on space complexity, but otherwise very nice work.
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| # Time Complexity: O(n log n) | ||
| # Space Complexity: O(n) | ||
| def heapsort(list) |
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| # Time Complexity: O(log n) | ||
| # Space Complexity: O(n) | ||
| def add(key, value = key) |
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👍 Why O(n) for space complexity, you add 1 element with this method.
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| # Time Complexity: O(log n) | ||
| # Space Complexity: O(1) | ||
| def remove() |
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👍 However for space complexity it's O(log n) because of the call stack.
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| # Time complexity: O(1) | ||
| # Space complexity: O(1) | ||
| def empty? |
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| # Time complexity: O(log n) | ||
| # Space complexity: O(1) | ||
| def heap_up(index) |
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👍 , but your space complexity is off due to recursion
| left_child = (index * 2) + 1 | ||
| right_child = (index * 2) + 2 | ||
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| return if @store[left_child].nil? || @store[right_child].nil? |
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What about if the left child is not nil and the right child is?
Could you end up not making a swap you needed to? This is a rare but possible scenario.
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Heaps Practice
Congratulations! You're submitting your assignment!
Comprehension Questions
heap_up&heap_downmethods useful? Why?