019f8fd211
git-subtree-dir: users/wpcarro git-subtree-mainline:464bbcb15cgit-subtree-split:24f5a642afChange-Id: I6105b3762b79126b3488359c95978cadb3efa789
22 lines
383 B
Python
22 lines
383 B
Python
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# swap :: Int -> Int -> [Char] -> IO ()
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def swap(ia, iz, xs):
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# handle swap when ia == iz
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assert ia <= iz
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xs[ia], xs[iz] = xs[iz], xs[ia]
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# reverse :: [Char] -> IO ()
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def reverse(xs):
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ia = 0
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iz = len(xs) - 1
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while ia <= iz:
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swap(ia, iz, xs)
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ia += 1
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iz -= 1
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x = list("superduperpooper")
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reverse(x)
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print(x)
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print("Tests pass")
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