[aklug] OT: Clojure help

[Christopher Howard]

I was having trouble subscribing without use of the proprietary Web
interface <https://www.gnu.org/philosophy/javascript-trap.en.html>. But
I think I just figured out how to do the email subscription.

I imagine I'll get plenty of help there.

On 05/26/2017 07:18 AM, Tim Johnson wrote:
>  clojure at googlegroups.com :)
> 
> * Christopher Howard <christopher.howard at qlfiles.net> [170526 05:16]:
>> Is there a Clojure programmer on one of these lists who wouldn't mind
>> corresponding with a Clojure n00b to answer a few basic questions? Here
>> is the first one:
>>
>> When I run
>>
>> tutorial.core> (let [img (new-image 32 32)] (set-pixel img 10 10 cyan)
>> (show img))
>>
>> from the REPL, this returns a javax.swing.JFrame object, and displays
>> the frame and image as expected. However, if put the same in
>>
>> (defn -main
>>   "Generates image."
>>   [& args]
>>   (let [img (new-image 32 32)]
>>     (set-pixel img 10 10 cyan)
>>     (show img)))
>>
>> in more core.clj, and run (-main) from the REPL, I get error
>>
>> ClassCastException java.awt.image.BufferedImage cannot be cast to
>> clojure.lang.IFn  tutorial.core/-main (core.clj:11)
>>
>> Why the difference?
>>
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> 

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