Solve bonus part of reverse-words
InterviewCake asks "How would you handle punctuation?". Without precise specs about what that entails, I'm supporting sentences ending with punctuation.
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@ -10,6 +10,9 @@ def reverse(xs, i, j):
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def reverse_words(xs):
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punctuation = None
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if len(xs) > 0 and xs[-1] in ".?!":
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punctuation = xs.pop()
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reverse(xs, 0, len(xs) - 1)
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i = 0
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j = i
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@ -19,6 +22,8 @@ def reverse_words(xs):
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reverse(xs, i, j - 1)
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j += 1
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i = j
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if punctuation:
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xs.append(punctuation)
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# Tests
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@ -59,5 +64,11 @@ class Test(unittest.TestCase):
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expected = list('')
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self.assertEqual(message, expected)
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def test_bonus_support_punctuation(self):
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message = list('yummy is cake bundt chocolate this!')
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reverse_words(message)
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expected = list('this chocolate bundt cake is yummy!')
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self.assertEqual(message, expected)
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unittest.main(verbosity=2)
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