This is the sample code to accompany the book Haskell in Depth (Vitaly Bragilevsky, Manning Publications 2021).

To get the source code on your system, you may want to clone this repository:

$ git clone https://github.com/bravit/hid-examples.git

To work with the code on your system, you need either:

• Stack
• A Minimal GHC installation
• The Haskell Platform

Using cabal (3.0+)

To build the whole package, issue the following command:

$ cabal build

To build only one project component:

$ cabal build hello

To run a component:

$ cabal run hello
Up to date
Hello, world
$ cabal -v0 run hello
Hello, world
$ cabal run stockquotes -- data/quotes.csv -c
...
$ file chart.svg
chart.svg: SVG Scalable Vector Graphics image

To explore a component in REPL:

$ cabal repl hello
...
$ cabal repl stockquotes
ghci> :m StatReport
ghci> :type mean
mean :: (Fractional a, Foldable t) => t a -> a

To test the whole package:

$ cabal test

To run one test-suite:

$ cabal test radar-test

Using Stack

To build:

stack build

To run:

stack exec <executable> [ -- <arguments>]

For example:

stack exec stockquotes -- data/quotes.csv -c
...
$ file chart.svg
chart.svg: SVG Scalable Vector Graphics image

To test:

stack test

To explore a component in REPL:

$ stack repl :stockquotes
ghci> :m StatReport
ghci> :t mean
mean :: (Fractional a, Foldable t) => t a -> a