On Tue, Jan 4, 2011 at 8:01 PM, MiltondSilva <shadowtr...@gmail.com> wrote:
> I believe it's for performance reasons. Strings in java are immutable,
> so they use the StringBuilder(mutable) to achieve better performance.

But str use StringBuilder too.  Maybe it was better to avoid the extra
call overhead?

-John


> On Jan 5, 12:18 am, John Szakmeister <j...@szakmeister.net> wrote:
>> I was looking at a commit that updated a docstring for str/join, which
>> enticed me to take a look at the implementation.  I was kind of
>> surprised to see that it wasn't:
>>   (apply str (interpose sep coll))
>>
>> I'm just curious about the developer was thinking.  Here's a link to the 
>> code:
>>   <https://github.com/clojure/clojure/blob/f30995c86056959abca53d0ca35dc...>
>>
>> Thanks!
>>
>> -John
>
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