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Branches - Erika #41
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Branches - Erika #41
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You definitely have a feel for linked lists, but you have a few bugs here. Take a look at my comments and let me know if you have questions.
Also you should look at the time/space complexities of the methods. It will help you identify when a linked list is more or less optimal a choice.
@@ -10,36 +10,75 @@ def initialize | |||
# Time complexity - ? | |||
# Space complexity - ? | |||
def add_first(data) |
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curr = curr.next | ||
end | ||
return curr.data | ||
end | ||
end | ||
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# Time complexity - ? | ||
# Space complexity - ? | ||
def get_at_index(index) |
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What about if the index is greater than the length of the list?
end | ||
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# Time complexity - ? | ||
# Space complexity - ? | ||
def get_last | ||
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curr = @head |
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What if head
is nil
?
curr = @head | |
return nil if @head.nil? | |
curr = @head |
count += 1 | ||
curr = curr.next | ||
end | ||
return count | ||
end | ||
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# Time complexity - ? | ||
# Space complexity - ? | ||
def add_last(data) |
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# Time complexity - ? | ||
# Space complexity - ? |
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No guesses on time/space complexity?
@@ -10,36 +10,75 @@ def initialize | |||
# Time complexity - ? | |||
# Space complexity - ? | |||
def add_first(data) | |||
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@head = Node.new(data, @head) | |||
end | |||
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# Time complexity - ? | |||
# Space complexity - ? | |||
def get_first |
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return nil | ||
else | ||
return @head.data | ||
end | ||
end | ||
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# Time complexity - ? | ||
# Space complexity - ? | ||
def length |
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Linked List Comprehension Questions