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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?
Describe a Stack
What are the 5 methods in Stack and what does each do?
Describe a Queue
What are the 5 methods in Queue and what does each do?
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 Erika, you hit the learning goals here. Well done.

Comment on lines +27 to +41
# if size of queue is equal to buffer_size we raise a value error
if self.size == self.buffer_size:
raise QueueFullException

# if queue is empty
if self.front == -1:
self.front = 0
self.rear = 1
self.store[self.front] = element
self.size += 1
return

self.store[self.rear] = element
self.rear = (self.rear + 1 ) % self.buffer_size
self.size += 1

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👍 This works, but the code could be a little simplified.

Comment on lines +49 to +57
# if queue is empty
if self.size == 0:
raise QueueEmptyException

temp = self.store[self.front]
self.front = (self.front + 1) % self.buffer_size
self.size -= 1

return temp

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👍

Comment on lines +64 to +67
if self.size == 0:
return None

return self.store[self.front]

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👍

return self.store[self.front]


def size(self):

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👍

Comment on lines +80 to +83
if self.size == 0:
return True
else:
return False

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Suggested change
if self.size == 0:
return True
else:
return False
return self.size == 0

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2 participants