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Manual bug on REMOVE
Date: Tue, 23 Jan 90 01:57 EST
From: RWK@FUJI.ILA.Dialnet.Symbolics.COM (Robert W. Kerns)
Date: Sat, 20 Jan 90 01:16:56 EST
Date: Fri, 19 Jan 90 12:05:38+0900
From: kddlab!atr-la.atr.co.jp!myers@uunet.UU.NET (John K. Myers)
Gen.7.2 manual 2A p 149 line 2: "REMOVE finds the first instance of a cons
whose car is EQL to the indicator, and removes the pair from the assoc list."
line 10, example: "(remove 'ruby gems) => [removed list]".
The REMOVE key in our system defaults to IDENTITY, the correct example is of course
(remove 'ruby gems :key #'car) => [removed list].
No, the manual is right. The :key function is applied to the car of each
cons, not to each cons.
Uh, Barry, the manual is wrong. GEMS is an ALIST. :KEY is applies to
each "bucket" of the ALIST. GEMS is a list of these buckets. But each
bucket is a CONS.
(setq gems (list 'diamond 'ruby 'emerald)) => (DIAMOND RUBY EMERALD)
This isn't what it gets set to in the manual.
(remove 'ruby gems) => (DIAMOND EMERALD)
The section the example appears in, is trying to explain
operations on alists, not REMOVE.
This and a related example have been fixed, although not in time to make
it into the 8.0 documentation. Thanks for pointing out the problem.