Re: in-place reverse?

From	James <news@oxdrove.co.uk>
Newsgroups	comp.lang.postscript
Subject	Re: in-place reverse?
Date	2021-10-24 11:04 +0100
Organization	poor
Message-ID	<sl3b3v$50o$1@dont-email.me> (permalink)
References	<d9c46408-0992-4b61-a35e-85be12aa3b70n@googlegroups.com>

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On 22/10/2021 07:24, luser droog wrote:
> I was reading through some old code and found this function to
> reverse an array.

> And I wondered if it were possible to do it in-place, without creating
> a new array.

/reverse {
aload dup length 1 sub
0 exch 1 exch
{ exch dup 4 2 roll exch put } for
} def

[ 1 2 3 4 5 ]
dup
reverse
pstack

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in-place reverse? luser droog <luser.droog@gmail.com> - 2021-10-21 23:24 -0700
  Re: in-place reverse? luser droog <luser.droog@gmail.com> - 2021-10-22 17:13 -0700
    Re: in-place reverse? luser droog <luser.droog@gmail.com> - 2021-10-22 17:42 -0700
    Re: in-place reverse? luser droog <luser.droog@gmail.com> - 2021-10-23 16:54 -0700
  Re: in-place reverse? luser droog <luser.droog@gmail.com> - 2021-10-22 17:16 -0700
  Re: in-place reverse? James <news@oxdrove.co.uk> - 2021-10-24 11:04 +0100
    Re: in-place reverse? luser droog <luser.droog@gmail.com> - 2021-10-24 17:59 -0700
    Re: in-place reverse? luser droog <luser.droog@gmail.com> - 2021-11-08 10:08 -0800
  Re: in-place reverse? David Newall <davidn@davidnewall.com> - 2022-01-21 21:10 +1100
    Re: in-place reverse? luser droog <luser.droog@gmail.com> - 2022-01-21 21:22 -0800
      Re: in-place reverse? jdaw1 <jdawiseman@gmail.com> - 2022-08-10 13:11 -0700

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