hmmm, seems like you, me and rayne all fail to handle the overlapping
node case correctly.
this is the best solution i've come up with that actually seems to
work:
(apply
merge-with
concat
{}
(for [nd d nd-pair nd face nd-pair]
{face (list nd)}))
try it with d set to this:
[d [#{#{1 2} #{3 5}}
#{#{1 2} #{3 4}}
#{#{5 6} #{7 8}}]]
On Dec 3, 2:00 pm, George Jahad <[email protected]> wrote:
> Actually my solution is wrong! It works for this particular example,
> but not if there are nodes with overlapping values.
> Doh!
>
> My main point was just that "into" is a under used gem, that I wanted
> to publicize a bit. Next time I'll try to find an example that is
> actually correct!
>
> On Dec 3, 12:46 pm, Laurent PETIT <[email protected]> wrote:
>
> > Yes,
>
> > though I've always found 'into a little bit too magical for me.
> > For example, I find it hard to follow the doc to see what 'adding' will mean
> > for maps.
>
> > 2010/12/3 George Jahad <[email protected]>
>
> > > > (apply
> > > > merge-with
> > > > conj
> > > > {}
> > > > (for [nd d nd-pair nd face nd-pair]
> > > > {face nd}))
>
> > > I like to use into for cases like this:
>
> > > (into {} (for [nd d nd-pair nd face nd-pair] [face nd]))
>
> > > seems clearer to me.
>
> > > g
>
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