Comments on: SICP section 3.1.1 http://eli.thegreenplace.net/2007/09/25/sicp-section-311/ Eli Bendersky's personal website Fri, 21 Nov 2008 23:47:16 +0000 http://wordpress.org/?v=2.6.2 By: eliben http://eli.thegreenplace.net/2007/09/25/sicp-section-311/#comment-92081 eliben Fri, 14 Dec 2007 06:30:06 +0000 http://eli.thegreenplace.net/2007/09/25/sicp-section-311/#comment-92081 I'm using <code>printf</code> to print the error to the screen and keep running. You can read about it in any CL reference, for example the Hyperspec. As for <code>(lambda (x) x)</code>, nothing strange in it - it's just the identity function, and sometimes it is even useful when writing higher-order functional code. I’m using printf to print the error to the screen and keep running. You can read about it in any CL reference, for example the Hyperspec.

As for (lambda (x) x), nothing strange in it - it’s just the identity function, and sometimes it is even useful when writing higher-order functional code.

]]> By: Kenjin http://eli.thegreenplace.net/2007/09/25/sicp-section-311/#comment-91938 Kenjin Thu, 13 Dec 2007 12:09:21 +0000 http://eli.thegreenplace.net/2007/09/25/sicp-section-311/#comment-91938 This is trivial but what do you think about this one. Instead of (printf "~a~%" "Bad password") (lambda (x) x) ------------------------------------------ just (lambda (x) "Bad password") For an absolute beginner like me, (lambda (x) x) seems so strange. and I've never seen printf. I can make a rough guess of course though. This is trivial but what do you think about this one.
Instead of
(printf “~a~%” “Bad password”)
(lambda (x) x)
——————————————
just
(lambda (x) “Bad password”)

For an absolute beginner like me,
(lambda (x) x) seems so strange.
and I’ve never seen printf. I can make a rough guess of course though.

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