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CheezItMan
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Nov 14, 2019
CheezItMan
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CheezItMan
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You didn't get to all of them, but the methods you wrote are very well done. Nice work. See my notes on time/space complexity. We'll go over the others in class.
| require "pry" | ||
| # Time complexity: O(n) | ||
| # Space complexity: O(n) | ||
| def factorial(n) |
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| last = s[-1] | ||
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| rest = s[0...-1] |
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s[1..-1] creates a new array and copies all the individual elements over and so is O(n) by itself.
| # Space complexity: ? | ||
| # Time complexity: O(n) | ||
| # Space complexity: O(n) | ||
| def reverse(s) |
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👍
This works, but because you create a new array with each recursive call this is O(n2) for both time/space complexity.
| end | ||
| end | ||
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| def swap(string, i, j) |
| raise NotImplementedError, "Method not implemented" | ||
| # Time complexity: O(n) | ||
| # Space complexity: O(n) | ||
| def reverse_inplace(string) |
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| # Time complexity: ? | ||
| # Space complexity: ? | ||
| def bunny(n) |
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