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From: HenHanna <HenHanna@devnull.tb>
Newsgroups: comp.lang.lisp
Subject: Re: Detele repeated in a list
Date: Sun, 21 Jul 2024 22:14:26 -0700
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On 7/21/2024 7:56 PM, HenHanna wrote:
> On 7/20/2024 5:21 PM, B. Pym wrote:
>> B. Pym wrote:
>>
>>> Pascal Costanza wrote:
>>>
>>>> (defun rem-duplicates (list)
>>>>     (loop for (first . rest) on (append list list)
>>>>           unless (member first (reverse rest) :test #'equal)
>>>>           collect first))
>>>
>>> Gauche Scheme
>>>
>>> (define (rem-dups lst)
>>>    (fold
>>>      (lambda (x accum) (if (member x accum) accum (cons x accum)))
>>>      '()
>>>      lst))
>>>
>>> (rem-dups '(0 2 3 4 (8 7) 3 2 0 (8 7)))
>>>    ===>
>>> (4 3 2 0 (8 7))
>>
>> Actual result:
>>
>> ((8 7) 4 3 2 0)
>>
> 
> 
> Gauche doesn't have RemDup  built in?


i remember that  ...  Rember  was one of the 1st
                            exercises in intro to Lisp

Maybe there was a naming convention that suggested
               that ...  Delete is destructive and Remove is not.


_________________________________________________________

delete x list :optional elt=             [Function]
delete! x list :optional elt=            [Function]

           [R7RS list] Equivalent to
                   (remove  (lambda (y) (elt= x y)) list)
                   (remove! (lambda (y) (elt= x y)) list)

              The comparison procedure, elt=, defaults to equal?.


delete-duplicates list :optional elt=         [Function]