[racket] Making a Racket function "recallable"

From: Danny Yoo (dyoo at cs.wpi.edu)
Date: Tue Feb 14 00:55:38 EST 2012

On Tue, Feb 14, 2012 at 12:32 AM, Joe Gilray <jgilray at gmail.com> wrote:
> Danny,
> Thanks for the explanations.  These are powerful ideas.  It appears not to
> generate the sequence until needed, very nice.
> How could I modify this to do the "less than n" idea?

A stream is a sequence, and also has a few more functions that act
very much like the familiar list-oriented functions.


So you could use stream-first and stream-rest on the fib-stream, as if
you had entire fibonacci sequence in front of you as an infinite list.
 Just don't try to stream->list it.

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