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YAPC::EU 2018 Glasgow Update!

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Ingy döt Net 2018-08-17 15:15:24 +01:00
parent 22f33d4004
commit 4e2d22a71d
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Task/JSON/Haskell/json-3.hs Normal file
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{-# LANGUAGE DeriveGeneric, OverloadedStrings #-}
import Data.Aeson
import GHC.Generics
data Person = Person { firstName :: String
, lastName :: String
, age :: Maybe Int
} deriving (Show, Eq, Generic)
instance FromJSON Person
instance ToJSON Person
main = do
let test1 = "{\"firstName\":\"Bob\", \"lastName\":\"Smith\"}"
test2 = "{\"firstName\":\"Miles\", \"lastName\":\"Davis\", \"age\": 45}"
print (decode test1 :: Maybe Person)
print (decode test2 :: Maybe Person)