Re: help understanding how map works
On Wed, Sep 28, 2011 at 6:32 PM, Cluj wrote:
> Thank you! Obvious once someone explains it :)
You could also do: (map vector '("A" "B" "C"))
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Re: help understanding how map works
Thank you! Obvious once someone explains it :) On Sep 28, 6:13 pm, Mark Engelberg wrote: > #([ % ]) is like: > (defn wrap [ x ] ([ x ]) ) > > not > (defn wrap [ x ] [ x ] ) -- 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 Note that posts from new members are moderated - please be patient with your first post. 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
Re: help understanding how map works
#([ % ]) is like: (defn wrap [ x ] ([ x ]) ) not (defn wrap [ x ] [ x ] ) -- 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 Note that posts from new members are moderated - please be patient with your first post. 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
help understanding how map works
I am learning Clojure and have installed Clojure 1.2.0 in an Ubuntu 11
box.
While playing with the map function I ran into some behavior I don't
understand.
I tried to use map to change a list of strings into a list of vectors
of strings, something like:
("A" "B" "C") => ( [ "A"] ["B"] ["C"])
Inlining the function does not work:
user=> (map #([ % ]) '("A" "B" "C"))
java.lang.IllegalArgumentException: Wrong number of args (0) passed
to: PersistentVector
user=>
But defining an external function does:
user=> (defn wrap [ x ] [ x ] )
#'user/wrap
user=> (map #(wrap %) '("A" "B" "C"))
(["A"] ["B"] ["C"])
user=>
can someone explain to me why this is the case?
Thanks for your help in advance!
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