tmcgilchrist

# 30 minutes Lisp in Ruby
# Hong Minhee <http://dahlia.kr/>
#
# This Lisp implementation does not provide a s-expression reader.
# Instead, it uses Ruby syntax like following code:
#
#     [:def, :factorial,
#       [:lambda, [:n],
#         [:if, [:"=", :n, 1],
#               1,

tmcgilchrist

Programming Achievements: How to Level Up as a Developer

1. Select a particular experience to pursue.
2. Pursue that experience to completion. (Achievement unlocked!)
3. Reflect on that experience. Really soak it in. Maybe a blog post would be in order?
4. Return to Step 1, this time selecting a new experience.

This gist is a fork of the gist from this blog post.

tmcgilchrist

Today we'll be looking into Kmett's
[adjunctions](http://hackage.haskell.org/package/adjunctions) library,
particularly the meat of the library in Data.Functor.Adjunction.

This post is a literate haskell file, which means you can load it right up in
ghci and play around with it! Like any good haskell file we need half a dozen
language pragmas and imports before we get started.

> {-# language DeriveFunctor #-}
> {-# language TypeFamilies #-}

tmcgilchrist

{-# LANGUAGE ConstraintKinds       #-}
{-# LANGUAGE DeriveGeneric         #-}
{-# LANGUAGE FlexibleContexts      #-}
{-# LANGUAGE FlexibleInstances     #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE PartialTypeSignatures #-}
{-# LANGUAGE TemplateHaskell       #-}
{-# LANGUAGE TypeApplications      #-}
{-# LANGUAGE TypeFamilies          #-}