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13 lines
509 B
13 lines
509 B
2 years ago
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Exercise 3.31: The internal procedure
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accept-action-procedure! defined in make-wire specifies that when
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a new action procedure is added to a wire, the procedure is immediately run.
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Explain why this initialization is necessary. In particular, trace through the
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half-adder example in the paragraphs above and say how the system’s response
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would differ if we had defined accept-action-procedure! as
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(define (accept-action-procedure! proc)
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(set! action-procedures
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(cons proc action-procedures)))
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