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Christian C15-Scissors #50

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Hash Table Practice

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Comprehension Questions

Question Answer
Why is a good Hash Function Important?
How can you judge if a hash function is good or not?
Is there a perfect hash function? If so what is it?
Describe a strategy to handle collisions in a hash table
Describe a situation where a hash table wouldn't be as useful as a binary search tree
What is one thing that is more clear to you on hash tables now

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@CheezItMan CheezItMan left a comment

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Overall nice work here. You hit the learning goals. I left comments on your space/time complexity. Let me know if you have questions.

Comment on lines 5 to 7
Time Complexity: ?
Space Complexity: ?
"""

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👍 Time/space complexity?

I think this is an O(n^2) time complexity algorithm in that the set difference function is an O(n) method.

Comment on lines 26 to -16
def top_k_frequent_elements(nums, k):
""" This method will return the k most common elements
In the case of a tie it will select the first occuring element.
Time Complexity: ?
Space Complexity: ?
"""
pass

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👍 Time/space complexity?

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2 participants