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Leaves - Morgan #34

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morganschuler
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Linked List Comprehension Questions

Question Response
1. What advantages does a LinkedList have over an Array? Linked lists are not stored continuously in memory, which makes them more efficient memory-wise because nodes are inserted into the list as they are initialized.
2. When is an Array more advantageous? Arrays have the advantage of having a faster search time, so they are better to use if you need to quickly iterate through all the elements. They are also better to use if you know the number of elements in the array prior so that you can allocate the correct amount of memory.

CheezItMan
CheezItMan reviewed Dec 18, 2019
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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.

lib/linked_list.rb
# Space complexity - ?

# Time complexity - O(1)
# Space complexity - O(1)
def add_first(data)
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👍

lib/linked_list.rb
# Space complexity - ?

# Time complexity - O(1)
# Space complexity - O(1)
def get_first
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👍

lib/linked_list.rb
# Space complexity - ?

# Time complexity - O(n)
# Space complexity - O(1)
def length
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👍

lib/linked_list.rb
# Space complexity - ?

# Time complexity - O(n)
# Space complexity - O(1)
def add_last(data)
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👍

lib/linked_list.rb
def get_last

current = head
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What if head is nil?

Suggested change
current = head
return nil if head.nil?
current = head

lib/linked_list.rb
# Space complexity - ?

# Time complexity - O(n)
# Space complexity - O(1)
def get_at_index(index)
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What if the index is greater than the length of the list?

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@morganschuler @CheezItMan