RangeExtra 10^-20

[dsimcha]

== Quote from dsimcha (dsimcha at yahoo.com)'s article
> == Quote from Simen Kjaeraas (simen.kjaras at gmail.com)'s article
> > dsimcha wrote:
> > > RangeExtra version 10^-20 is officially out.  It consists of a small and
> > > hopefully growing number of ranges that didn't make it into the new
> > > Phobos
> > > that I've gotten working reasonably well and I feel eventually belong in
> > > Phobos.
> > >
> > > Docs / What's there:
> > > http://cis.jhu.edu/~dsimcha/rangeextra.html
> > >
> > > Code:
> > > http://dsource.org/projects/scrapple/browser/trunk/rangeextra/rangeextra.d
> > >
> > > License:
> > > Dual licensed, Phobos license or BSD (Tango style).
> > I had hoped reindex would give me access to true 'random' access ranges, but it
> seems this does not work:
> >   auto b = reindex!( "uniform( 0, this.length )" )( [0,1,2,3,4].dup );
> > :p

> On the other hand, I really like the idea of a with-replacement random sampling
> primitive.  This sounds like it belongs in RandomCover.  Maybe Andrei can extend
> RandomCover (which already samples w/o replacement) to include a replacement
> parameter.  RandomCover w/ replacement == false would do what it does now.  If
> replacement == true, it would be an infinite range that samples with replacement.

Here's a first attempt:  I took Andrei's RandomCover, fixed bug 2865 (This version
of RandomCover passes basic statistical tests for uniformity of the distribution
over the permutation space), and added a template overload to allow sampling with
replacement.  It's under the Phobos license to make it as easy as possible to add
back to Phobos.  I'll file an enhancement request.

http://dsource.org/projects/scrapple/browser/trunk/rangeextra/randomcover.d