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add ch1 ex6

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Juthatip McDevitt 2025-07-27 17:17:31 -05:00
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chapter_1/ex_6.rkt
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@ -33,7 +33,7 @@
;--------------------------------------------------------------------------------------------------------------------------
;ex_6
;Alyssa P. Hacker doesn’t see why if needs to be provided as a special form. “Why can’t I just define it as an ordinary procedure in terms of cond?” she asks. Alyssa’s friend Eva Lu Ator claims this can indeed be done, and she defines a new version of if:
;Alyssa P. Hacker doesn’t see why if needs to be provided as a special form. “Why can’t I just define it as an ordinary procedure in terms of cond?” she asks. Alyssa’s friend Eva claims this can indeed be done, and she defines a new version of if:
;(define (new-if predicate then-clause else-clause)
; (cond (predicate then-clause)
; (else else-clause))