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Recursion is the act of defining an object or solving a problem in terms of itself
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The goal of this book is to teach the reader to think recursively
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Mental illness is recursive
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writing programs recursively in a lisp is essentially
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=>
simple pattern recognition
- car => first
- cdr => rest
- eq? => =
- null? => nil?
- add1 => inc
- sub1 => dec
- lambda => fn (I think?)
- define => def
- pair? => list?
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cond => cond
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quote => '(1 2 3) or quote
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cons => cons
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number? => number?
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and => and
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or => or
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zero? => zero?
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:S(concerns scheme) -
:L(concerns LISP) -
variables and names of primitive operations are
italicized -
keywords are boldface
- atom - not a list, and not a sequence
- lat - list of atoms