On Mon, Apr 20, 2009 at 1:59 PM, David Nolen <dnolen.li...@gmail.com> wrote:
> Maps aren't ordered so this isn't a good idea anyway.
It's a good idea if you have a sorted map. My example should have used
sorted-map.
> The reason first/second work is because they call seq on the collection.
> (key (nth (seq {:a 1 :b 2 :c 3}) 1)) -> :b
>
Thanks! I think 'nth ought to behave just like 'first and 'second,
don't you? If it's a good idea for 'first it's a good idea for 'nth.
[Apologies to all for the several redundant posts on this topic. I've
been getting rejection messages from Google Groups for no reason].
> On Mon, Apr 20, 2009 at 2:51 PM, hughw <hwink...@gmail.com> wrote:
>>
>> Hi all,
>>
>> Why should 'first and 'second work on maps, but not 'nth?
>>
>> user> (key (first {:a 1 :b 2 :c 3}))
>> :a
>> user> (key (nth {:a 1 :b 2 :c 3} 0))
>> ; Evaluation aborted.
>>
>> java.lang.UnsupportedOperationException: nth not supported on this
>> type: PersistentArrayMap (NO_SOURCE_FILE:0)
>> [Thrown class clojure.lang.Compiler$CompilerException]
>>
>> Thanks,
>> Hugh
>>
>>
>
>
> >
>
--
Hugh Winkler, CEO
Wellstorm Development
31900 Ranch Road 12
Suite 206
Dripping Springs, TX 78620
USA
http://www.wellstorm.com/
+1 512 264 3998 x801
--~--~---------~--~----~------------~-------~--~----~
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
-~----------~----~----~----~------~----~------~--~---
