def test_remove_rear(self):
d = Dequeue()
d.add_front("apple")
d.add_front("banana")
d.add_front("cherry")
self.assertEqual(d.remove_rear(), "apple")
self.assertEqual(d.items, ["cherry", "banana"])
def PalindromeDetector(string):
dq = Dequeue()
for letter in string:
dq.add_rear(letter)
while dq.size() > 1:
if dq.remove_front() != dq.remove_rear():
return False
return True
def palindrome_checker(word):
"""Return True if word reads the same forward and backward."""
d = Dequeue()
for character in word:
d.add_rear(character)
backwards = "".join([d.remove_rear() for character in word])
if word == backwards:
return True
return False
def check_palindrome(string_to_check):
dq = Dequeue()
dq.set_items(string_to_check)
is_palindrome = True
while dq.size() > 1:
if dq.remove_front() != dq.remove_rear():
is_palindrome = False
return is_palindrome
def test_remove_rear(self):
"""Test remove rear method."""
d = Dequeue()
d.add_rear(1)
d.add_rear(2)
d.add_rear(3)
self.assertEqual(d._items, [1, 2, 3])
rear = d.remove_rear()
self.assertEqual(rear, 3)
self.assertEqual(d._items, [1, 2])
def check_palindrome(string_to_check):
sanitised_string = re.sub("[^a-zA-Z]","", string_to_check).lower()
dq = Dequeue()
dq.set_items(sanitised_string)
is_palindrome = True
while dq.size() > 1:
if dq.remove_front() != dq.remove_rear():
is_palindrome = False
return is_palindrome
class PalindromeChecker:
def __init__(self):
self.dq = Dequeue()
def check_if_palindrome(self, word):
self.dq.items = list(word)
is_palindrome = True
while self.dq.size() > 1:
first_letter = self.dq.remove_front()
last_letter = self.dq.remove_rear()
if first_letter != last_letter:
is_palindrome = False
return is_palindrome
def pal_checker(word):
chardequeue = Dequeue()
for char in word:
chardequeue.add_rear(char)
still_equal = True
while chardequeue.size() > 1 and still_equal:
first = chardequeue.remove_front()
last = chardequeue.remove_rear()
if first != last:
still_equal = False
return still_equal
def test_remove_empty(self):
d = Dequeue()
self.assertEqual(d.items, [])
self.assertEqual(d.remove_front(), None)
self.assertEqual(d.remove_rear(), None)
