Wow that's so short! Thanks Chouser! I will abstain from showing the
awful hack that I've been working with currently.
-Patrick
On Aug 21, 8:45 pm, Chouser <chou...@gmail.com> wrote:
> On Sat, Aug 21, 2010 at 7:11 PM, CuppoJava <patrickli_2...@hotmail.com> wrote:
> > Hi Everyone,
>
> > I'm extremely stuck on this simple regex question, which I'm sure
> > someone with a little more experience will be able to write in a
> > second. I would really appreciate the help.
>
> > Given a string consisting of a's, b's, and spaces: "aaa bbb abb ab
> > bb"
>
> > I want to tokenize this into string's of a's and b's.
> > eg. "aaa", "bbb", "a", "bb", "a", "b", "bb"
>
> > AND also, I have to be able to tell which of the strings of b's was
> > preceded with an "a", and which was preceded by a space.
>
> (->> "aaa bbb abb ab bb"
> (re-seq #"(?<=(.))?(\w)\2*")
> (map (fn [[s pre]] {:s s, :pre pre})))
>
> returns a lazy seq:
> ({:s "aaa", :pre nil}
> {:s "bbb", :pre " "}
> {:s "a", :pre " "}
> {:s "bb", :pre "a"}
> {:s "a", :pre " "}
> {:s "b", :pre "a"}
> {:s "bb", :pre " "})
>
> --Chouserhttp://joyofclojure.com/
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