Leaves - Dominique #25
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CheezItMan
reviewed
Feb 23, 2020
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Nice work, you hit most of the learning goals here. Not bad. Take a look at my comments and let me know if you have questions. The methods you have written all work, except for delete and you've demonstrated an understanding of how to implement a Linked List, but you still have some things to work on. Take a look at my suggestions and let me know what questions you have.
| @@ -19,54 +19,154 @@ def initialize | |||
| # method to add a new node with the specific data value in the linked list | |||
| # insert the new node at the beginning of the linked list | |||
| def add_first(value) | |||
| new_node.next = @head | ||
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| @head = new_node | ||
| # head is not a node, it is just a variable that refers to the first node | ||
| end | ||
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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) |
| current = current.next | ||
| end | ||
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| return false | ||
| end | ||
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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 |
| current = current.next | ||
| end | ||
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| return max | ||
| end | ||
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| # method to return the min value in the linked list | ||
| # returns the data value and not the node | ||
| def find_min |
| end | ||
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| return min | ||
| end | ||
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| # method that returns the length of the singly linked list | ||
| def length |
| end | ||
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| until current == nil | ||
| if current.next.data == value |
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Suggested change
| if current.next.data == value | |
| if !current.next.nil? && current.next.data == value |
| current = current.next | ||
| end | ||
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| return linked_list_array | ||
| end | ||
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| # method to delete the first node found with specified value | ||
| def delete(value) |
| raise NotImplementedError | ||
| return nil if @head == nil | ||
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| return @head.data | ||
| end | ||
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| # method that inserts a given value as a new last node in the linked list | ||
| def add_last(value) |
| current = current.next | ||
| end | ||
| current.next = new_node | ||
| end | ||
| end | ||
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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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| until current == nil | ||
| if current.next.data == value | ||
| current.next == current.next.next |
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Small bug here
Suggested change
| current.next == current.next.next | |
| current.next = current.next.next |
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