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Haskell Cookbook by Yogesh Sajanikar

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How to do it...

  1. Create a new project, working-with-aeson-lens, with a simple stack template.
        stack new working-with-aeson-lens simple
  1. Add a dependency on the lens library in the build-depends sub-section of the executable section. Also add dependency on aeson and lens-aeson libraries. Also add bytestring and text, as aeson uses bytestring for parsing and text for string values. Add vector, as we need to work with arrays in JSON:
 executable working-with-aeson-lens
   hs-source-dirs:      src
   main-is:             Main.hs
   default-language:    Haskell2010
   build-depends:       base >= 4.7 && < 5
                        , lens
                        , lens-aeson
                        , aeson
                        , bytestring
                        , text
                        , vector
  1. Open src/Main.hs. We will be adding our source here. Use the OverloadedStrings extension and define the Main module. ...

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