On Tue, Nov 10, 2009 at 1:00 AM, Richard Newman <[email protected]> wrote:
> > I have a vector a [ [2 3] [4 5] [6 7] ]
> >
> > And I want to be able to get [2 3 4 5 6 7]
>
> user=> (reduce into [ [2 3] [4 5] [6 7] ])
> [2 3 4 5 6 7]
>
This and another solution have already been posted, but there's also:
(vec (apply concat [ [2 3] [4 5] [6 7] ]))
(vec (mapcat identity [ [2 3] [4 5] [6 7] ]))
(into [] (apply concat [ [2 3] [4 5] [6 7] ]))
(into [] (mapcat identity [ [2 3] [4 5] [6 7] ]))
(into [] (remove vector? (tree-seq vector? seq [ [2 3] [4 5] [6 7] ])))
of which the last will also do e.g. [[2 [4 5]] [[8 9] [11 1]] [17]].
Of course, then we're getting pretty close to the implementation of flatten,
which is
(filter (complement sequential?)
(rest (tree-seq sequential? seq x)))
(apparently whoever wrote it never heard of remove). :)
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