mikamix · February 6, 2014 10:30
diff --git a/2.59.scm b/2.59.scm
 (define (union-set set1 set2)
  (cond ((null? set1) set2) 
        ((element-of-set? (car set1) set2) (union-set (cdr set1) set2))
        (else (cons (car set1)
                    (union-set (cdr set1) set2)))))
	(define (union-set set1 set2)
	(cond ((null? set1) set2)
	((element-of-set? (car set1) set2) (union-set (cdr set1) set2))
	(else (cons (car set1)
	(union-set (cdr set1) set2)))))
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