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@adia-9 adia-9 commented Jan 2, 2022

Stacks and Queues

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

Comprehension Questions

Question Answer
What is an ADT? ADT is a representation of a data type, where only method is defined but not implementation
Describe a Stack It's an ADT that holds an ordered, linear sequence of items
What are the 5 methods in Stack and what does each do? push(), pop(), peak(), is_empty(), is_full()
Describe a Queue t's an ADT that holds an ordered collection of items where the addition of new items happens at one end - back, and the removal of existing items occurs at the other end, front
What are the 5 methods in Queue and what does each do? enqueue(), dequeue(), queue(), is_empty(), size()
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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@CheezItMan CheezItMan left a comment

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Nice work Aida, you hit the learning goals here. Well done.



def enqueue(self, element):

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👍

self.size += 1
return None

def dequeue(self):

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👍

except:
raise QueueEmptyException("Error message")

def front(self):

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👍

except:
raise QueueEmptyException("Error message")

def size(self):

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👍

raise QueueEmptyException("Error message")


def empty(self):

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👍 I don't think you need to raise an exception here.

Comment on lines +75 to +78
try:
return self.size == 0
except:
raise QueueEmptyException("Error message")

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Suggested change
try:
return self.size == 0
except:
raise QueueEmptyException("Error message")
return self.size == 0

except:
raise QueueEmptyException("Error message")

def __str__(self):

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👍

Returns None
"""
pass
self.store.add_last(element)

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👍 The stack functions work.

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2 participants