scissors laurel O #48
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CheezItMan
reviewed
Feb 1, 2022
heaps/heap_sort.py
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| def heap_sort(list): | ||
| """ This method uses a heap to sort an array. | ||
| Time Complexity: ? | ||
| Space Complexity: ? | ||
| """ | ||
| Time Complexity: O(n log n)? | ||
| Space Complexitty: O(n)? | ||
| """ |
heaps/min_heap.py
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| def add(self, key, value = None): | ||
| """ This method adds a HeapNode instance to the heap | ||
| If value == None the new node's value should be set to key | ||
| Time Complexity: ? | ||
| Space Complexity: ? | ||
| Time Complexity: O(log n) | ||
| Space Complexity: O(1)? O(log n)? | ||
| """ |
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👍 Correct space complexity is O(log n)
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| def remove(self): | ||
| """ This method removes and returns an element from the heap | ||
| maintaining the heap structure | ||
| Time Complexity: ? | ||
| Space Complexity: ? | ||
| Time Complexity: O(log n) | ||
| Space Complexity: O(log n) | ||
| """ |
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| def heap_up(self, index): | ||
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| """ This helper method takes an index and | ||
| moves it up the heap, if it is less than it's parent node. | ||
| It could be **very** helpful for the add method. | ||
| Time complexity: ? | ||
| Space complexity: ? | ||
| Time complexity: O(log n) | ||
| Space complexity: O(log n) | ||
| """ |
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| def heap_down(self, index): | ||
| """ This helper method takes an index and | ||
| moves it up the heap if it's smaller | ||
| than it's parent node. | ||
| """ |
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👍 I wouldn't name a variable poncho here.
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WOW, I agree. I am sorry about that. I think I had Willie Nelson's cover of TVZ stuck in my head and was pretty sleepy. (1) I have no business naming anything anything near that (2) I didn't even spell pancho right.
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Heaps Practice
Congratulations! You're submitting your assignment!
Comprehension Questions
heap_up&heap_downmethods useful? Why?