Branches - Angele #34
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CheezItMan
reviewed
Feb 23, 2020
| @@ -19,67 +19,166 @@ 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) | |||
| next_node = @head | ||
| @head = Node.new(value, next_node) | ||
| end | ||
| return @head | ||
| 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) |
| found = true | ||
| end | ||
| end | ||
| return found | ||
| 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 |
| max = checking_node.data | ||
| end | ||
| end | ||
| 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 |
| min = checking_node.data | ||
| end | ||
| end | ||
| return min | ||
| end | ||
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| # method that returns the length of the singly linked list | ||
| def length |
| current_node = next_node | ||
| end | ||
| @head = current_node | ||
| @head.next = previous_node | ||
| end | ||
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| ## Advanced Exercises | ||
| # returns the value at the middle element in the singly linked list | ||
| def find_middle_value |
There was a problem hiding this comment.
👍 Good use of the existing length method.
| times_to_go.times do | ||
| current_node = current_node.next | ||
| end | ||
| return current_node.data | ||
| end | ||
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| # 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 +193,35 @@ def has_cycle | |||
| # returns the value in the first node | |||
| # returns nil if the list is empty | |||
| def get_first | |||
| @@ -94,18 +193,35 @@ def has_cycle | |||
| # returns the value in the first node | |||
| # returns nil if the list is empty | |||
| def get_first | |||
| raise NotImplementedError | |||
| return nil if @head.nil? | |||
| 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) | |||
| checking_node = checking_node.next | ||
| end | ||
| checking_node.next = Node.new(value) | ||
| 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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