Personalizing messages using a text template

Sometimes we have a large list of usernames and relating data and we wish to individually send each person a message. This recipe will create a text template that will be filled out from the data.

Getting ready

Install the template library using cabal:

$ cabal install template

How to do it…

Perform the following steps in a new file called Main.hs:

1. Import the libraries as follows:

   {-# LANGUAGE OverloadedStrings #-}
   
   
   
   import qualified Data.ByteString.Lazy as S
   import qualified Data.Text as T
   import qualified Data.Text.IO as TIO
   import qualified Data.Text.Lazy.Encoding as E
   import qualified Data.ByteString as BS
   import Data.Text.Lazy (toStrict)
   import Data.Text.Template

2. Define the data we are dealing with as follows:

   myData = [ [ ("name", "Databender"), ("title", "Dr.") ],
              [ ("name", "Paragon"), ("title", "Master") ],
              [ ("name", &quot...