Compare <a href="https:&#x2F;&#x2F;en.wikibooks.org&#x2F;wiki&#x2F;Write_Yourself_a_Scheme_in_48_Hours" rel="nofollow">https:&#x2F;&#x2F;en.wikibooks.org&#x2F;wiki&#x2F;Write_Yourself_a_Scheme_in_48_...</a> for Lisp in Haskell.