anchor.diff:  ; Note: map and reduce don't have shortcuts
   
   ; `slice` or `\` is just like JavaScript's .slice()
  +; But do note, it takes the list as the first argument, not the last.
   (slice (.. 1 5) 2) ; => (3 4 5)
   (\ (.. 0 100) -5) ; => (96 97 98 99 100)
   
  
positive.code: ; which are just things inside parens separated by whitespace
  not_in_form
  (in_form)
  
  ; Whip has one number type (which is a 64-bit IEEE 754 double, from JavaScript).
  3 ; => 3
  
negative.code: ; technically always used anonymouesly. Redundancy.
  ((lambda (x) x) 10) ; => 10
  
  ;;;;;;;;;;;;;;;;
  ; Comprehensions
  
  ; `range` or `..` generates a list of numbers for
  ; each number between it's two args.
  