Added Chapter 12

Ch12/Code01_csv/Code1201.cabal

@@ -0,0 +1,25 @@
+-- Initial Code1201.cabal generated by cabal init.  For further 
+-- documentation, see http://haskell.org/cabal/users-guide/
+
+name:                Code1201
+version:             0.1.0.0
+synopsis:            Exporting CSV.
+-- description:         
+homepage:            haskelldata.com
+license:             GPL-2
+license-file:        ../LICENSE
+author:              Nishant Shukla
+maintainer:          nick722@gmail.com
+-- copyright:           
+category:            Data
+build-type:          Simple
+-- extra-source-files:  
+cabal-version:       >=1.10
+
+executable Code1201
+  main-is:             Main.hs
+  -- other-modules:       
+  -- other-extensions:    
+  build-depends:       base >=4.6 && <4.7, cassava >=0.4 && <0.5, bytestring >=0.10 && <0.11
+  -- hs-source-dirs:      
+  default-language:    Haskell2010

Ch12/Code01_csv/Main.hs

@@ -0,0 +1,8 @@
+import Data.Csv
+import qualified Data.ByteString.Lazy as BSL
+
+myData :: [(Char, Int)]
+myData = zip ['A'..'Z'] [1..]
+
+-- Exporting to CSV
+main = BSL.writeFile "letters.csv" $ encode myData

Ch12/Code01_csv/Makefile

@@ -0,0 +1,5 @@
+default:
+	cabal install --bindir=./
+
+clean:
+	rm -rf dist Setup.hs Code1201 *~ *.csv

Ch12/Code02_json/Code1202.cabal

@@ -0,0 +1,25 @@
+-- Initial Code1202.cabal generated by cabal init.  For further 
+-- documentation, see http://haskell.org/cabal/users-guide/
+
+name:                Code1202
+version:             0.1.0.0
+synopsis:            Exporting JSON.
+-- description:         
+homepage:            haskelldata.com
+license:             GPL-2
+license-file:        ../LICENSE
+author:              Nishant Shukla
+maintainer:          nick722@gmail.com
+-- copyright:           
+category:            Data
+build-type:          Simple
+-- extra-source-files:  
+cabal-version:       >=1.10
+
+executable Code1202
+  main-is:             Main.hs
+  -- other-modules:       
+  -- other-extensions:    
+  build-depends:       base >=4.6 && <4.7, yocto >=1.0 && <1.1, containers >=0.5 && <0.6
+  -- hs-source-dirs:      
+  default-language:    Haskell2010

Ch12/Code02_json/Main.hs

@@ -0,0 +1,16 @@
+import Text.JSON.Yocto
+import qualified Data.Map as M
+
+data Point = Point Rational Rational
+
+pointObject (Point x y) = 
+  Object $ M.fromList [ ("x", Number x)
+                      , ("y", Number y)]
+
+-- Exporting to JSON
+main = do
+  let points = [ Point 1 1
+               , Point 3 5
+               , Point (-3) 2]
+  let pointsArray = Array $ map pointObject points
+  writeFile "points.json" $ encode pointsArray

Ch12/Code02_json/Makefile

@@ -0,0 +1,5 @@
+default:
+	cabal install --bindir=./
+
+clean:
+	rm -rf dist Setup.hs Code1202 *~ *.json

Ch12/Code03_sql/Code1203.cabal

@@ -0,0 +1,25 @@
+-- Initial Code1203.cabal generated by cabal init.  For further 
+-- documentation, see http://haskell.org/cabal/users-guide/
+
+name:                Code1203
+version:             0.1.0.0
+synopsis:            Exporting to SQLite.
+-- description:         
+homepage:            haskelldata.com
+license:             GPL-2
+license-file:        ../LICENSE
+author:              Nishant Shukla
+maintainer:          nick722@gmail.com
+-- copyright:           
+category:            Database
+build-type:          Simple
+-- extra-source-files:  
+cabal-version:       >=1.10
+
+executable Code1203
+  main-is:             Main.hs
+  -- other-modules:       
+  other-extensions:    OverloadedStrings
+  build-depends:       base >=4.6 && <4.7, sqlite-simple >=0.4 && <0.5
+  -- hs-source-dirs:      
+  default-language:    Haskell2010

Ch12/Code03_sql/Main.hs

@@ -0,0 +1,33 @@
+-- sqlite3 test.db "CREATE TABLE test (id INTEGER PRIMARY KEY, str text); \
+-- INSERT INTO test (str) VALUES ('test string');"
+
+{-# LANGUAGE OverloadedStrings #-}
+
+import Control.Applicative
+import Database.SQLite.Simple
+import Database.SQLite.Simple.FromRow
+
+data TestField = TestField Int String deriving (Show)
+
+instance FromRow TestField where
+  fromRow = TestField <$> field <*> field
+
+getDB :: Connection -> IO [TestField]
+getDB conn = query_ conn "SELECT * from test"
+
+insertToDB :: Connection -> String -> IO ()  
+insertToDB conn item = 
+  execute conn 
+  "INSERT INTO test (str) VALUES (?)" 
+  (Only item)
+
+-- Storing to SQLite
+main :: IO ()
+main = withConnection "test.db" dbActions
+
+dbActions :: Connection -> IO ()
+dbActions conn = do
+  let dataItems = ["A", "B", "C"]
+  mapM_ (insertToDB conn) dataItems 
+  r <- getDB conn
+  mapM_ print r 

Ch12/Code03_sql/Makefile

@@ -0,0 +1,7 @@
+default:
+	rm -rf test.db
+	sqlite3 test.db "CREATE TABLE test (id INTEGER PRIMARY KEY, str text);"
+	cabal install --bindir=./
+
+clean:
+	rm -rf dist Setup.hs Code1203 *~ test.db

Ch12/Code04_html/Code1204.cabal

@@ -0,0 +1,25 @@
+-- Initial Code1204.cabal generated by cabal init.  For further 
+-- documentation, see http://haskell.org/cabal/users-guide/
+
+name:                Code1204
+version:             0.1.0.0
+synopsis:            Exporting to HTML.
+-- description:         
+homepage:            haskelldata.com
+license:             GPL-2
+license-file:        ../LICENSE
+author:              Nishant Shukla
+maintainer:          nick722@gmail.com
+-- copyright:           
+category:            Data
+build-type:          Simple
+-- extra-source-files:  
+cabal-version:       >=1.10
+
+executable Code1204
+  main-is:             Main.hs
+  -- other-modules:       
+  other-extensions:    OverloadedStrings
+  build-depends:       base >=4.6 && <4.7, blaze-html >=0.7 && <0.8, bytestring >=0.10 && <0.11
+  -- hs-source-dirs:      
+  default-language:    Haskell2010

Ch12/Code04_html/Main.hs

@@ -0,0 +1,24 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+import Control.Monad (forM_)
+
+import Text.Blaze.Html5
+import qualified Text.Blaze.Html5 as H
+import Text.Blaze.Html.Renderer.Utf8 (renderHtml)
+import qualified Data.ByteString.Lazy as BSL
+
+dataInList :: Html -> [String] -> Html
+dataInList label items = docTypeHtml $ do    
+  H.head $ do
+    H.title "Generating HTML from data"
+  body $ do
+    p label
+    ul $ mapM_ (li . toHtml) items
+
+-- Saving to MongoDB    
+main = do    
+  let movies = [ "2001: A Space Odyssey"
+               , "Watchmen"
+               , "GoldenEye" ]
+  let html = renderHtml $ dataInList "list of movies" movies
+  BSL.writeFile "index.html" $ html

Ch12/Code04_html/Makefile

@@ -0,0 +1,5 @@
+default:
+	cabal install --bindir=./
+
+clean:
+	rm -rf dist Setup.hs Code1204 *~ *.html

Ch12/Code05_mongo/Code1205.cabal

@@ -0,0 +1,25 @@
+-- Initial Code1205.cabal generated by cabal init.  For further 
+-- documentation, see http://haskell.org/cabal/users-guide/
+
+name:                Code1205
+version:             0.1.0.0
+synopsis:            Exporting to MongoDB.
+-- description:         
+homepage:            haskelldata.com
+license:             GPL-2
+license-file:        ../LICENSE
+author:              Nishant Shukla
+maintainer:          nick722@gmail.com
+-- copyright:           
+category:            Database
+build-type:          Simple
+-- extra-source-files:  
+cabal-version:       >=1.10
+
+executable Code1205
+  main-is:             Main.hs
+  -- other-modules:       
+  other-extensions:    OverloadedStrings, ExtendedDefaultRules
+  build-depends:       base >=4.6 && <4.7, mongoDB >=1.4 && <1.5, mtl >=2.1 && <2.2
+  -- hs-source-dirs:      
+  default-language:    Haskell2010

Ch12/Code05_mongo/Main.hs

@@ -0,0 +1,24 @@
+{-# LANGUAGE OverloadedStrings, ExtendedDefaultRules #-}
+
+import Database.MongoDB
+import Control.Monad.Trans (liftIO)
+
+data Person = Person { first :: String 
+                     , last :: String }
+
+myData :: [Person]
+myData = [ Person "Mercury" "Merci"
+         , Person "Sylvester" "Smith"]
+
+-- Exporting to HTML
+main = do
+    pipe <- runIOE $ connect (host "127.0.0.1")
+    e <- access pipe master "test" (store myData)
+    close pipe
+    print e
+
+store vals = insertMany "people" mongoList 
+  where mongoList = map 
+                    (\(Person f l) -> 
+                      ["first" =: f, "last" =: l]) 
+                    vals

Ch12/Code05_mongo/Makefile

@@ -0,0 +1,5 @@
+default:
+	cabal install --bindir=./
+
+clean:
+	rm -rf dist Setup.hs Code1205 *~ 

Ch12/Code06_tex/Code1206.cabal

@@ -0,0 +1,25 @@
+-- Initial Code1206.cabal generated by cabal init.  For further 
+-- documentation, see http://haskell.org/cabal/users-guide/
+
+name:                Code1206
+version:             0.1.0.0
+synopsis:            Exporting to LaTeX.
+-- description:         
+homepage:            haskelldata.com
+license:             GPL-2
+license-file:        ../LICENSE
+author:              Nishant Shukla
+maintainer:          nick722@gmail.com
+-- copyright:           
+category:            Text
+build-type:          Simple
+-- extra-source-files:  
+cabal-version:       >=1.10
+
+executable Code1206
+  main-is:             Main.hs
+  -- other-modules:       
+  other-extensions:    OverloadedStrings
+  build-depends:       base >=4.6 && <4.7, HaTeX >=3.13 && <3.14, containers >=0.5 && <0.6
+  -- hs-source-dirs:      
+  default-language:    Haskell2010

Ch12/Code06_tex/Main.hs

@@ -0,0 +1,38 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+import Text.LaTeX
+import Text.LaTeX.Base.Class
+import Text.LaTeX.Base.Syntax
+import qualified Data.Map as M
+
+-- Exporting to LaTeX
+main :: IO ()
+main = execLaTeXT myDoc >>= renderFile "output.tex"
+
+myDoc :: Monad m => LaTeXT_ m
+myDoc = do
+ thePreamble
+ document theBody
+
+thePreamble :: Monad m => LaTeXT_ m
+thePreamble = do
+ documentclass [] article
+ author "Dr. Databender"
+ title "Data Analyst"
+
+myData :: [(Int,Int)]
+myData = [ (1, 50)
+         , (2, 100)
+         , (3, 150)]
+
+theBody :: Monad m => LaTeXT_ m
+theBody = do
+ maketitle
+ section "Fancy Data Table"
+ bigskip
+ center $ underline $ textbf "Table of Points"
+ center $ tabular Nothing [RightColumn, VerticalLine, LeftColumn] $ do
+   textbf "Time" & textbf "Cost"
+   lnbk
+   hline
+   mapM_ (\(t, c) -> do texy t & texy c; lnbk) myData

Ch12/Code06_tex/Makefile

@@ -0,0 +1,5 @@
+default:
+	cabal install --bindir=./
+
+clean:
+	rm -rf dist Setup.hs Code1206 *~ *.aux *.log *.pdf *.tex

Ch12/Code07_template/Code1207.cabal

@@ -0,0 +1,25 @@
+-- Initial Code1207.cabal generated by cabal init.  For further 
+-- documentation, see http://haskell.org/cabal/users-guide/
+
+name:                Code1207
+version:             0.1.0.0
+synopsis:            Exporting to a template.
+-- description:         
+homepage:            haskelldata.com
+license:             GPL-2
+license-file:        ../LICENSE
+author:              Nishant Shukla
+maintainer:          nick722@gmail.com
+-- copyright:           
+category:            Text
+build-type:          Simple
+-- extra-source-files:  
+cabal-version:       >=1.10
+
+executable Code1207
+  main-is:             Main.hs
+  -- other-modules:       
+  other-extensions:    OverloadedStrings
+  build-depends:       base >=4.6 && <4.7, bytestring >=0.10 && <0.11, text >=0.11 && <0.12, template >=0.2 && <0.3
+  -- hs-source-dirs:      
+  default-language:    Haskell2010

Ch12/Code07_template/Main.hs

@@ -0,0 +1,31 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module Main where
+
+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
+
+myData = [ [ ("name", "Databender"), ("title", "Dr.") ],
+           [ ("name", "Paragon"), ("title", "Master") ],
+           [ ("name", "Marisa"), ("title", "Madam") ] ]
+
+myTemplate = template "Hello $title $name!"
+myData' = context [ ("name", "Joe"), ("title", "Mr") ]    
+
+context :: [(T.Text, T.Text)] -> Context
+context assocs x = maybe err id . lookup x $ assocs
+  where err = error $ "Could not find key: " ++ T.unpack x
+
+-- Exporting with text templates
+main :: IO ()
+main = do
+  let res = map (\d -> toStrict( render myTemplate (context d))) myData
+  TIO.writeFile "messages.txt" $ T.unlines res
+    
+

Ch12/Code07_template/Makefile

@@ -0,0 +1,5 @@
+default:
+	cabal install --bindir=./
+
+clean:
+	rm -rf dist Setup.hs Code1207 *~ messages.txt

Ch12/Code08_mat/Code1208.cabal

@@ -0,0 +1,25 @@
+-- Initial Code1208.cabal generated by cabal init.  For further 
+-- documentation, see http://haskell.org/cabal/users-guide/
+
+name:                Code1208
+version:             0.1.0.0
+synopsis:            Exporting a matrix.
+-- description:         
+homepage:            haskelldata.com
+license:             GPL-2
+license-file:        ../LICENSE
+author:              Nishant Shukla
+maintainer:          nick722@gmail.com
+-- copyright:           
+category:            Math
+build-type:          Simple
+-- extra-source-files:  
+cabal-version:       >=1.10
+
+executable Code1208
+  main-is:             Main.hs
+  -- other-modules:       
+  -- other-extensions:    
+  build-depends:       base >=4.6 && <4.7, repa-io >=3.2 && <3.3, repa >=3.2 && <3.3
+  -- hs-source-dirs:      
+  default-language:    Haskell2010

Ch12/Code08_mat/Main.hs

@@ -0,0 +1,12 @@
+import Data.Array.Repa.IO.Matrix
+import Data.Array.Repa
+
+x :: Array U DIM2 Int 
+x = fromListUnboxed (Z :. (4::Int) :. (3::Int)) 
+  [ 1, 2, 9, 10
+  , 4, 3, 8, 11
+  , 5, 6, 7, 12 ]
+
+-- Exporting a matrix
+main = writeMatrixToTextFile "output.dat" x
+

Ch12/Code08_mat/Makefile

@@ -0,0 +1,5 @@
+default:
+	cabal install --bindir=./
+
+clean:
+	rm -rf dist Setup.hs Code1208 *~ output.dat

Ch12/LICENSE

@@ -0,0 +1,339 @@
+             GNU GENERAL PUBLIC LICENSE
+                Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                     Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
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+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
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+have the freedom to distribute copies of free software (and charge for
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+
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+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
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+
+It is not the purpose of this section to induce you to infringe any
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+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
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+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
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+
+                     NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+              END OF TERMS AND CONDITIONS
+
+     How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.

Ch12/README.md

@@ -6,8 +6,17 @@ Refer to the book for step-by-step explanations.
 
 <p align="center"><a href="http://haskelldata.com" target="_blank"><img src="http://haskelldata.com/images/ch12.png"/></a></p>
 
-# How to use
+# Recipes
+* **Code01**: Exporting data to a CSV file
+* **Code02**: Exporting data as JSON
+* **Code03**: Using SQLite to store data
+* **Code04**: Saving data to a MongoDB database
+* **Code05**: Presenting results in an HTML web page
+* **Code06**: Creating a LaTeX table to display results
+* **Code07**: Personalizing messages using a text template
+* **Code08**: Exporting matrix values to a file
 
+# How to use
 ### Setting up the environment
 Install the [Haskell Platform](http://www.haskell.org/platform/).