Space - Hala #37
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Space - Hala #37
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CheezItMan
reviewed
Sep 1, 2020
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| # Time Complexity: O(1) | ||
| # Space Complexity: O(1) | ||
| def add_first(value) |
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| # Time Complexity: O(N) | ||
| # Space Complexity: O(1) | ||
| def search(value) |
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| # Time Complexity: O(N) | ||
| # Space Complexity: O(1) | ||
| def find_max |
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| # Time Complexity: O(N) | ||
| # Space Complexity: O(1) | ||
| def find_min |
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| # Time Complexity: O(N) | ||
| # Space Complexity: O(1) | ||
| def length |
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| length = 1 | ||
| current = @head | ||
| if current.nil? | ||
| return 0 | ||
| elsif current.next.nil? | ||
| return 1 | ||
| else | ||
| while current.next != nil | ||
| length +=1 | ||
| current = current.next | ||
| end | ||
| end | ||
| return length |
There was a problem hiding this comment.
This could be simplified a bit:
Suggested change
| length = 1 | |
| current = @head | |
| if current.nil? | |
| return 0 | |
| elsif current.next.nil? | |
| return 1 | |
| else | |
| while current.next != nil | |
| length +=1 | |
| current = current.next | |
| end | |
| end | |
| return length | |
| len = 0 | |
| current = @head | |
| until current.nil? | |
| len += 1 | |
| current = current.next | |
| end | |
| return len | |
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| # Time Complexity: O(N) | ||
| # Space Complexity: O(1) | ||
| def get_at_index(index) |
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| # Time Complexity: O(N) | ||
| # Space Complexity: O(1) | ||
| def visit |
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| current = @head | ||
| while current != nil | ||
| if @head.next.nil? && @head.data == value | ||
| @head = nil | ||
| elsif @head.next != nil && @head.data == value | ||
| @head = @head.next | ||
| elsif current.next != nil && current.prev != nil && current.data == value | ||
| prevn = current.prev | ||
| nextn = current.next | ||
| prevn.next = nextn | ||
| nextn.prev = prevn | ||
| elsif !current.prev.nil? && current.data == value | ||
| current.prev.next = current.next | ||
| end | ||
| current = current.next | ||
| end |
There was a problem hiding this comment.
This is a bit overcomplicated
Suggested change
| current = @head | |
| while current != nil | |
| if @head.next.nil? && @head.data == value | |
| @head = nil | |
| elsif @head.next != nil && @head.data == value | |
| @head = @head.next | |
| elsif current.next != nil && current.prev != nil && current.data == value | |
| prevn = current.prev | |
| nextn = current.next | |
| prevn.next = nextn | |
| nextn.prev = prevn | |
| elsif !current.prev.nil? && current.data == value | |
| current.prev.next = current.next | |
| end | |
| current = current.next | |
| end | |
| if @head.data == value | |
| @head = @head.next | |
| return | |
| end | |
| current = @head | |
| previous = nil | |
| until current.nil? | |
| if current.data == value | |
| previous.next = current.next | |
| return | |
| end | |
| previous = current | |
| current = current.next | |
| end | |
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| # Time Complexity: O(N) | ||
| # Space Complexity: O(1) | ||
| def reverse |
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