Re: [Boost-users] [boost-users] anyways to flatten a stl container.

From: Digvijoy Chatterjee (digvijoy.c_at_[hidden])
Date: 2007-10-24 12:55:09

..and how do u intend to create a container that stores any container(
set, multiset ,list, vector..... ) in C++ , if u really want stuff
like Ruby ....take a look at boost::variant ( already known types of
containers to store in a container ) , or boost::any ( unknown
container types to be stored in a container )

HTH
Digz

On 10/23/07, chun ping wang <cablepuff_at_[hidden]> wrote:
> hmm it could be container of any type (set, multiset, list, vector, array,
> deque).
>
> It should act like ruby on rails, flatten.
>
> http://www.ruby-doc.org/core/classes/Array.html#M002241
>
> On 10/22/07, Vinzenz 'evilissimo' Feenstra <evilissimo_at_[hidden]> wrote:
> >
> > Oops, some typos here.
> >
> > Vinzenz 'evilissimo' Feenstra schrieb:
> > > Hi,
> > >
> > > I am wondering how your example container looks like, since it seems to
> > > contain several types.
> > >
> > > If container is a container containing containers with values, you could
> > > do something like this:
> >
> > > [code]
> > > vector<container::value_type::value_type> flattened;
> > > for(container::iterator it = c.begin(), end = c.end();beg != end; ++it)
> > >     flattened(it->begin(), it->end(), std::back_inserter(flattened));
> > > [/code]
> > Should be:
> > [code]
> > std::vector<container::value_type::value_type> flattened;
> > for(container::iterator it = c.begin(), end = c.end();beg != end; ++it)
> >      std::copy(it->begin(), it->end(), std::back_inserter(flattened));
> > [/code]
> >
> > > Regards,
> > > Vinzenz
> > >
> > > chun ping wang schrieb:
> > >> Is their some kind of method to flatten a stl container...
> > >>
> > >> example [[1, 4], [a,b, c], [b, [e]] ] becomes [1, 4, a, b, c, b, e]
> > >>
> > >>
> >
> > Sorry for the mistake.
> > Regards,
> > Vinzenz
> >
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> >
>