From: Heime <heimeborgia@protonmail.com>
To: Emanuel Berg <incal@dataswamp.org>
Cc: help-gnu-emacs@gnu.org
Subject: Re: Too many permutations computed
Date: Fri, 04 Aug 2023 18:44:49 +0000 [thread overview]
Message-ID: <29_RCsXxqgvFMr0fCC8_S37RlUHg1FC4k9YCKpfSQQaAIkYV6k6k4MNrKiwAYYS-dX3wEqJPszTWohnhFU8uJxWMgHCB6xeClsDBHEeD-o8=@protonmail.com> (raw)
In-Reply-To: <87wmybkc4m.fsf@dataswamp.org>
------- Original Message -------
On Friday, August 4th, 2023 at 10:13 AM, Emanuel Berg <incal@dataswamp.org> wrote:
> uzibalqa wrote:
>
> > > Again you can check out these two
> > >
> > > https://dataswamp.org/~incal/emacs-init/perm.el
> > > https://www.emacswiki.org/emacs/StringPermutations
> > >
> > > but after spending so much time on your own solution I get it
> > > you want to complete it ...
> >
> > There are many algorithms out there. You should mention the
> > kind of algorithm you are implementing.
>
>
> Not sure it has one? But it is for permutation of list
> elements in general, the rest is just using it for the string
> use case.
It does use a published technique, but did not take time to determine
which one is it. If I can space some time, I can check things out.
> Maybe Emacs should have a built-in permutation
> function BTW, and a ditto library with helpers, e.g.
> for strings ...
That would make sense because permutations is quite a standard thing
today with a number of algorithms. The implementation to use depends
on how much complication you are willing to accept programatically.
The more complicated, the more benefits you get.
> > I am using the original algorithm bf Robert Heap (1964).
> > It is not the common implementation you see because what
> > I have seen is the implementation of a simpler algorithm
> > (programatically), but which is not optimal in the way
> > Robert constructed it.
>
>
> Okay, well, see if you can get it to work then ...
>
> --
> underground experts united
> https://dataswamp.org/~incal
next prev parent reply other threads:[~2023-08-04 18:44 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-01 18:45 Too many permutations computed uzibalqa
2023-08-02 10:13 ` Emanuel Berg
2023-08-03 15:42 ` uzibalqa
2023-08-03 16:49 ` uzibalqa
2023-08-03 22:13 ` Emanuel Berg
2023-08-04 18:44 ` Heime [this message]
2023-08-03 15:52 ` uzibalqa
2023-08-03 16:08 ` Emanuel Berg
2023-08-04 18:39 ` Heime
2023-08-03 18:23 ` tpeplt
2023-08-03 23:25 ` Emanuel Berg
2023-08-04 21:45 ` tpeplt
2023-08-06 13:32 ` Emanuel Berg
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