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CheezItMan
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Feb 23, 2020
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Nice work, you hit all the learning goals here. Well done. Take a look at my comments and let me know if you have questions. The methods you have written all work and you've demonstrated an understanding of how to implement a Linked List. There are a few like delete which aren't done. Let me know if you have questions on how to implement them.
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| # method to find if the linked list contains a node with specified value | ||
| # returns true if found, false otherwise | ||
| def search(value) |
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| # method to return the max value in the linked list | ||
| # returns the data value and not the node | ||
| def find_max |
lib/linked_list.rb
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| return nil if @head == nil | ||
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| current = @head | ||
| min = 0 |
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What if all the elements are negative numbers?
Suggested change
| min = 0 | |
| min = current.data |
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| # method that returns the length of the singly linked list | ||
| def length |
| # method that returns the value at a given index in the linked list | ||
| # index count starts at 0 | ||
| # returns nil if there are fewer nodes in the linked list than the index value | ||
| def get_at_index(index) |
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| # method to reverse the singly linked list | ||
| # note: the nodes should be moved and not just the values in the nodes | ||
| def reverse |
| @@ -79,7 +150,25 @@ def find_middle_value | |||
| # find the nth node from the end and return its value | |||
| # assume indexing starts at 0 while counting to n | |||
| def find_nth_from_end(n) | |||
| @@ -94,18 +183,41 @@ def has_cycle | |||
| # returns the value in the first node | |||
| # returns nil if the list is empty | |||
| def get_first | |||
| end | ||
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| # method that inserts a given value as a new last node in the linked list | ||
| def add_last(value) |
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| # method that returns the value of the last node in the linked list | ||
| # returns nil if the linked list is empty | ||
| def get_last |
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