haskell-course-graham-hutton

Course (link)

http://www.cs.nott.ac.uk/~pszgmh/pgp.html

Step 1. Install GHC

https://www.haskell.org/ghc/

Alternatives:

Homebrew: brew install ghc

Starting GHC (general; no specific file):

ghci

Exiting GHC (general; no specific file):

:q

Starting GHC (specific file):

ghci <filename>

Exiting GCH (specific file):

:q

Reload a script (after a change)

:reload

Load a new script

:load <filename>

Check type

:type <expr>

Show all commands

:?

Naming Requirements

Function and argument names must begin with a lower-case letter:

newFunction
fun2
arg_2
x' 

List arguments usually have an 's' suffix:

xs
ns
nss (list of list(s)) 

Layout rule

In a sequence of definitions, each definition must begin in precisely the same column (spaces / indents) (avoids need for explicit syntax while grouping):

a = 10
b = 20
c = 30