sicp-ex-4.23



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meteorgan

  
  
 In Alyssa's analyze-sequence, execute-sequence is running in runtime. But the solution in the text unrolls this procedure.  for example: for  ((lambda (x) (+ x 1)) 1), 
 Alyssa's analyze-sequence is (lambda (env) (execute-sequence (lambda ...) env)), 
 analyze-sequence in text is (lambda (env) ((lambda ...) env)).