use JSON files as if they were Haskell values / live life maximally with simple language semantics

a.json

{
    "hello": "world",
    "this": {
        "can": {
            "be": "nested"
        }
    }
}

JSONBaby.hs

#!/usr/bin/env stack
-- stack --resolver lts-4.2 --install-ghc runghc --package file-embed --package aeson --package lens --package lens-aeson

{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TemplateHaskell #-}

module JSONBaby where

import Control.Lens
import Data.Aeson
import Data.Aeson.Lens
import Data.FileEmbed

value :: Maybe Value
value = (decode . view lazy) $(embedFile "a.json")

main :: IO ()
main = do
  print value
  print (value ^? _Just . key "hello")
  print (value ^? _Just . key "this" . key "can" . key "be")

output.hs

Just (Object (fromList [("hello",String "world"),("this",Object (fromList [("can",Object (fromList [("be",String "nested")]))]))]))
Just (String "world")
Just (String "nested")