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furu/exercise-5-1-fast-reverse.ipynb

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exercise-5-1-fast-reverse.ipynb
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"The Glorious Glasgow Haskell Compilation System, version 7.10.2"
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":!ghc --version"
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"I have a pen"
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":ext OverloadedStrings\n",
"\n",
"import qualified Data.Text as T\n",
"import qualified Data.Text.IO as T\n",
"import Data.Monoid ((<>))\n",
"\n",
"reverseInside' :: T.Text -> T.Text\n",
"reverseInside' word\n",
" | T.length word <= 3 = word\n",
" | otherwise = T.singleton prefix <> T.reverse inside <> T.singleton suffix\n",
" where\n",
" prefix = T.head word\n",
" inside = T.init (T.tail word)\n",
" suffix = T.last word\n",
"\n",
"-- sentence = \"wchih is why Esilgnh is slitl pltcefrey lbilege wehn you wtrie it lkie tihs\"\n",
"sentence = \"I hvae a pen\"\n",
"\n",
"T.putStrLn $ T.unwords $ map reverseInside' (T.words sentence)"
]
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":t map\n",
":t (<>)\n",
":t (++)"
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}
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