Essential Haskell Libaray Practice

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cassava

CSV parser and encoder
able to generic

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attoparsec

One kind Parsec
Data.Attoparsec.ByteString.Char8 is much more useful.
NB : the Result can be Partial, which means the parsec may not come to end. To avoid this, try parseOnly

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Lens

the misusing of _XXX and XXX could be a common naive mistake.