I've also found this useful for accessing members in nested maps. For
example:
(let [me {:person {:name {:first "Mark"
:last "Triggs"}
:email "mark.h.tri...@gmail.com"}}]
(-> me :person :name :first))
=> "Mark"
On Jan 12, 1:04 pm, kkw <kevin.k....@gmail.com> wrote:
> One use I've found for -> (though there are others I haven't come to
> appreciate yet) is when I have something like:
> (f1 (f2 (f3 (f4 x))))
>
> which can be re-written as
> (-> x f4 f3 f2 f1)
>
> I find the latter expression easier to read.
>
> Kev
>
> On Dec 30 2008, 2:49 pm, wubbie <sunj...@gmail.com> wrote:
>
> > Very criptic for newbie.
> > What does "Threads the expr through the forms." mean?
> > Does it create a thread to execute?
>
> > thanks
> > sun
>
> > On Dec 29, 10:07 pm, Paul Barry <pauljbar...@gmail.com> wrote:
>
> > > You can look up the documentation for a function/macro interactively
> > > from the repl:
>
> > > user=> (doc ->)
> > > -------------------------
> > > clojure.core/->
> > > ([x form] [x form & more])
> > > Macro
> > > Threads the expr through the forms. Inserts x as the
> > > second item in the first form, making a list of it if it is not a
> > > list already. If there are more forms, inserts the first form as the
> > > second item in second form, etc.
> > > nil
>
> > > On Dec 29, 8:27 pm, wubbie <sunj...@gmail.com> wrote:
>
> > > > Hi all,
>
> > > > Looking intoants.clj, I came across
> > > > (defn place [[x y]]
> > > > (-> world (nth x) (nth y)))
>
> > > > What -> mean here?
>
> > > > thanks
> > > > sun
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To post to this group, send email to clojure@googlegroups.com
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
-~----------~----~----~----~------~----~------~--~---
