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Replies to Extension to MAP

To: VERACSD@a.isi.edu, common-lisp@sail.stanford.edu
Subject: Replies to Extension to MAP
From: Guy Steele <gls@Think.COM>
Date: Wed, 25 Mar 87 16:20 EST
Cc: moon@scrc-stony-brook.arpa, rwk@scrc-yukon.arpa, barmar@think.com, vrotney@venera.isi.edu, norvig%cogsci.berkeley.edu@ucbvax.berkeley.edu, gls@think.com
In-reply-to: <[A.ISI.EDU]23-Mar-87 14:45:49.VERACSD>

I really shouldn't, but I will...

How about, if the first arg to MAP is an integer, it specifies
which argument should be clobbered?  This doesn't allow an
unrelated sequence to be be clobbered, of course, but it does
allow the common case of an in-place MAP operation.

	(MAP 1 FN SEQ1 SEQ2)    ;clobbers SEQ1 with answers
	(MAP 2 FN SEQ1 SEQ2)    ;clobbers SEQ2 with answers

--Quux

References:
- Replies to Extension to MAP
  - From: VERACSD@A.ISI.EDU

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