thanks Rayne.
On Fri, Dec 3, 2010 at 4:02 PM, Rayne <disciplera...@gmail.com> wrote:
> Here is what I came up with.
>
> (let [d [#{#{1 2} #{3 4}} #{#{5 6} #{7 8}}]]
> (reduce
> (fn [mp nd]
> (apply merge
> (for [nd-pair nd face nd-pair] (update-in mp [face] #(conj
> % nd))))) {} d))
>
> On Dec 3, 3:42 am, Sunil S Nandihalli <sunil.nandiha...@gmail.com>
> wrote:
> > Hello everybody,
> > I would like to know as to how I would write the following code in a
> > more idiomatic way.
> >
> > (let [mp (atom {})
> > d [#{#{1 2}
> > #{3 4}} ;node1
> > #{#{5 6}
> > #{7 8}} ;node2]]
> > (dorun (for [nd d nd-pair nd face nd-pair]
> > (swap! mp update-in [face] #(conj % nd))))
> > @mp)
> >
> > ; if you consider that points 1 2 3 4 form the node node1 and 5 6 7 8
> > form node2
> > ;I would like a map in the opposite direction ..
> > ;i.e. I should be able to find out all the nodes of which 1 is part of
> and
> > ;that is what the above code is doing.. but would like to know as to what
> > ;would be a more idiomatic way of doing this.
> >
> > https://gist.github.com/726773
> >
> > I don't like the fact that I am using atom and swap .. can anybody
> > suggest a better way to do it?
> >
> > Thanks,
> > Sunil.
>
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