Those of us who tend the land
set about to planting
The rest do what we can

• I may have the LP in the garage somewhere but we don't have a turntable set up.
• Google finds nothing:
• http://www.google.com/#q="those+of+us+who+tend+the+land"
• http://www.google.com/#q="set about to planting"
• http://www.google.com/#q="the rest do what we can"

(define (eval exp env)
  (cond ((self-evaluating? exp) exp)
        ((variable? exp) (lookup-variable-value exp env))
        ((quoted? exp) (text-of-quotation exp))
        ((assignment? exp) (eval-assignment exp env))
        ((definition? exp) (eval-definition exp env))
        ((if? exp) (eval-if exp env))
        ((lambda? exp)
         (make-procedure (lambda-parameters exp)
                         (lambda-body exp)
                         env))
        ((begin? exp) 
         (eval-sequence (begin-actions exp) env))
        ((cond? exp) (eval (cond->if exp) env))
        ((application? exp)
         (apply (eval (operator exp) env)
                (list-of-values (operands exp) env)))
        (else
         (error "Unknown expression type -- EVAL" exp))))

• http://mitpress.mit.edu/sicp/full-text/book/book-Z-H-26.html

We want to write a function that generates accumulators-- a function that takes a number n, and returns a function that takes another number i and returns n incremented by i.

JavaScript

Scheme

Try

JavaScript

Scheme

• via Paul Graham's Revenge of the Nerds