ports - sav #16
Open
ports - sav #16
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
CheezItMan
reviewed
May 29, 2019
CheezItMan
left a comment
CheezItMan
left a comment
There was a problem hiding this comment.
Outstanding, you had nearly all the methods done in ideal time complexity and had pretty accurate Big-O predictions. You hit all learning goals.
| def reverse(s) | ||
| raise NotImplementedError, "Method not implemented" | ||
| return "" if s.empty? | ||
| return s[-1] << reverse(s[0...-1]) |
There was a problem hiding this comment.
Technically s[0...-1] creates a new string of length n-1, so this algorithm is actually n^2
| # Space complexity: ? | ||
| def reverse_inplace(s) | ||
| raise NotImplementedError, "Method not implemented" | ||
| # Time complexity: O(n) where is the number of chars in the string |
| def nested(s, left = 0, right = nil) | ||
| right ||= s.length - 1 | ||
| return true if left >= right | ||
| return false if s.length.odd? || s[right] == s[left] |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
No description provided.