The preface

• Recursion is the act of defining an object or solving a problem in terms of itself

• The goal of this book is to teach the reader to think recursively

• Mental illness is recursive

• writing programs recursively in a lisp is essentially

• => simple pattern recognition

SCHEME LORD MAP

• car => first
• cdr => rest
• eq? => =
• null? => nil?
• add1 => inc
• sub1 => dec
• lambda => fn (I think?)
• define => def
• pair? => list?

SCHEME == CLOJURE

• cond => cond

• quote => '(1 2 3) or quote

• cons => cons

• number? => number?

• and => and

• or => or

• zero? => zero?

• :S (concerns scheme)

• :L (concerns LISP)

• variables and names of primitive operations are italicized

• keywords are boldface

SCHEME DICTIONARY

• atom - not a list, and not a sequence
• lat - list of atoms