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annotate similar.hs @ 13:88d6897c391a

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Redefine Similar. reject function in data
author Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
date Sat, 06 Sep 2014 11:03:34 +0900
parents 158ae705cd16
children 116131b196bb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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88d6897c391a Redefine Similar. reject function in data
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 12
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1 data Similar a = Single a | Similar a (Similar a)
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7c7efee7891f Define Monad style Similer
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
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88d6897c391a Redefine Similar. reject function in data
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 12
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3 same :: (Eq a) => Similar a -> a
88d6897c391a Redefine Similar. reject function in data
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
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4 same (Single x) = x
88d6897c391a Redefine Similar. reject function in data
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 12
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5 same (Similar x s) = if x == (same s) then x else undefined
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7c7efee7891f Define Monad style Similer
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158ae705cd16 Rename Similer -> Similar
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 11
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7 instance (Eq a) => Eq (Similar a) where
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88d6897c391a Redefine Similar. reject function in data
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 12
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8 s == ss = (same s) == (same ss)
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7c7efee7891f Define Monad style Similer
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88d6897c391a Redefine Similar. reject function in data
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10 instance Functor Similar where
88d6897c391a Redefine Similar. reject function in data
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 12
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11 fmap f (Single a) = Single (f a)
88d6897c391a Redefine Similar. reject function in data
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12 fmap f (Similar a s) = Similar (f a) (fmap f s)
88d6897c391a Redefine Similar. reject function in data
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 12
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88d6897c391a Redefine Similar. reject function in data
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 12
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14 {-
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7c7efee7891f Define Monad style Similer
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158ae705cd16 Rename Similer -> Similar
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 11
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16 mu :: (Eq a) => Similar (Similar a) -> Similar a
158ae705cd16 Rename Similer -> Similar
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 11
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17 mu (Similar a f b) = if ((f a) == b) then b else undefined
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7a82a5e50499 Initial commit. define to Functor for Similer
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
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158ae705cd16 Rename Similer -> Similar
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 11
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19 similar :: (Eq a) => (a -> a) -> (a -> a) -> a -> a
158ae705cd16 Rename Similer -> Similar
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
parents: 11
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20 similar f g x = same $ Similar x g (f x)
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e8a5df54480e Define sample for Monad style
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7a82a5e50499 Initial commit. define to Functor for Similer
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3c5fbce357af Define >>= for Similer
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6e0285628ead Define similer function
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24 double :: Int -> Int
6e0285628ead Define similer function
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
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25 double x = (2 * x)
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66609010d477 Define Similer example as Functor
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6e0285628ead Define similer function
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
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27 twicePlus :: Int -> Int
6e0285628ead Define similer function
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
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28 twicePlus x = x + x
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66609010d477 Define Similer example as Functor
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6e0285628ead Define similer function
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
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30 plusTwo :: Int -> Int
6e0285628ead Define similer function
Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
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31 plusTwo x = x + 2
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66609010d477 Define Similer example as Functor
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e8a5df54480e Define sample for Monad style
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33 -- samples
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5e367a167382 Define samples
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e8a5df54480e Define sample for Monad style
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35 {-
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158ae705cd16 Rename Similer -> Similar
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36 *Main> same $ Main.return 100 Main.>>= (\x -> Similar x twicePlus $ double x)
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37 200
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5e367a167382 Define samples
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158ae705cd16 Rename Similer -> Similar
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39 *Main> same $ Main.return 2 Main.>>= (\x -> Similar x plusTwo $ double x)
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e8a5df54480e Define sample for Monad style
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parents: 10
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40 4
e8a5df54480e Define sample for Monad style
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158ae705cd16 Rename Similer -> Similar
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parents: 11
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42 *Main> same $ Main.return 100 Main.>>= (\x -> Similar x plusTwo $ double x)
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e8a5df54480e Define sample for Monad style
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parents: 10
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43 *** Exception: Prelude.undefined
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7c7efee7891f Define Monad style Similer
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44 -}
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158ae705cd16 Rename Similer -> Similar
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88d6897c391a Redefine Similar. reject function in data
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46 -}