OpenEuphoria

Re: Permutations

• Posted by "Unkmar" <L3Euphoria at bellsouth.net> Jun 30, 2004
• 858 views

----- Original Message ----- 
From: "Patrick Barnes"
Sent: Wednesday, June 30, 2004 1:48 AM
Subject: Re: Permutations


> 
> > That function is a permutation function.
> > It will generate any requested permutation based on index and
> > permutation set.
> 
> Ah, I see. It would take a while to generate if the set was 1 million
> objects in length, though. It *would* be more secure than a fixed
> offset from the last point to the next.

It doesn't support more than 17 in length atom size limitation.

> One thing is, that the function needs to return indexes, not the
> values themselves, so that if I had this:
> }}}
<eucode>
> x = perm(original_sequence, number)
> new = {}
> for a = 1 to length(x) do
>     new &= original_sequence[ x[a] ]
> end for
> --at this point, new contains the permutation
> </eucode>
{{{

> how would I alter the code snippet you gave me?
> 
> -- 
> MrTrick

There are a couple ways of doing this.
One method is a wrapper around what I have already
created.
Another requires a reworking of my code.
I'm still not sure what 'number' is suppose to be.
unless it is an permutation index value.
A value that states *which* permutation to return
indexing values for?

    unkmar