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Update and rename circular_queue.py to circular_queue_array.py

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marina 2023-08-07 18:05:15 -07:00 • committed by GitHub
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63
queues/circular_queue.py
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@ -1,63 +0,0 @@
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# author: bt3gl
class CircularQueue:
def __init__(self, k: int):
self.head = 0
self.tail = 0
self.size = k
self.queue = [None] * self.size
def enqueue(self, value: int) -> bool:
if value is None:
return False
if self.is_full():
return False
if self.is_empty():
self.heard = 0
while self.queue[self.tail] is not None:
self.tail += 1
if self.tail == self.size:
self.tail = 0
self.queue[self.tail] = value
return True
def dequeue(self) -> bool:
if self.is_empty():
return False
value = self.queue[self.head]
self.queue[self.head] = None
self.head += 1
if self.head == self.size:
self.head = 0
return True
def front(self) -> int:
return self.queue[self.head] or -1
def rear(self) -> int:
return self.queue[self.tail] or -1
def is_empty(self) -> bool:
for n in self.queue:
if n is not None:
return False
return True
def is_full(self) -> bool:
for n in self.queue:
if n is None:
return False
return True