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Working with Ruby

MATSUBARA Nobutada matsubara0507

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Working with Ruby
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compiler: ghc-8.2.0.20170507
compiler-check: match-exact
resolver: lts-8.13
setup-info:
ghc:
linux64:
8.2.0.20170507:
url: https://downloads.haskell.org/~ghc/8.2.1-rc2/ghc-8.2.0.20170507-x86_64-deb8-linux.tar.xz
content-length: 141011788
sha1: ff886437c1d2ddfa5686d6c9efb0819a957c3dde
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE GADTs #-}
import Control.Monad
import Control.Applicative
import Control.Monad.Skeleton
import qualified Data.Map as M
import Text.Trifecta