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Sara - Branches #35

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Stacks and Queues

Thanks for doing some brain yoga. You are now submitting this assignment!

Comprehension Questions

Question Answer
What is an ADT? Abstract data type
Describe a Stack Last in First out (LIFO)
What are the 5 methods in Stack and what does each do? Initialize: creates a linked list, Push: add an element to the last position, Pop: Removes the first element, Empty: returns true if the linked list is empty, to_s: returns the linked list into string format
Describe a Queue First in First out (FIFO)
What are the 5 methods in Queue and what does each do? Initialize: Creates an array, Enqueue: Adds an element, Dequeue: removes an element, Front: returns the element at the front, Empty?: check if queue is empty, to_s: return queue as a string.
What is the difference between implementing something and using something?

OPTIONAL JobSimulation

Question Answer
Did you include a sample run of your code as a comment?

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Well you didn't create the Queue using a circular buffer... using a LinkedList wasn't the assignment. So... there's that. It all works, and Stack is fine, but it's a good idea to read the assignment.

@@ -1,28 +1,61 @@
# Wave 2
# require_relative './stack.rb'
require "./linked_list"

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This should be a require_relative, although you don't need a linked list in this class for the assignment.

class Queue

def initialize
# @store = ...
raise NotImplementedError, "Not yet implemented"
@store = LinkedList.new

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⚠️ You were asked to use a circular buffer instead of a LinkedList for this class.

These work, but using a LinkedList wasn't the assignment.

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2 participants