Re: Beginner: let with Java object

2017-05-26 Thread Christopher Howard 
I restarted the Emacs CIDER REPL, and now it seems to work fine. Maybe I
just don't understand how to use this CIDER REPL properly.

On 05/26/2017 07:58 AM, Gary Trakhman wrote:
> There shouldn't be a difference, I would suspect a typo in your file.
> 
> The error 'ClassCastException java.awt.image.BufferedImage cannot be cast to
> clojure.lang.IFn  tutorial.core/-main (core.clj:11)' would lead me to
> look for things like '(img)' where the object ends up in call position
> of the s-expression.
> 
> On Fri, May 26, 2017 at 11:54 AM Christopher Howard
> mailto:christopher.how...@qlfiles.net>>
> wrote:
> 
> 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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Re: Beginner: let with Java object

2017-05-26 Thread Gary Trakhman 
There shouldn't be a difference, I would suspect a typo in your file.

The error 'ClassCastException java.awt.image.BufferedImage cannot be cast to
clojure.lang.IFn  tutorial.core/-main (core.clj:11)' would lead me to look
for things like '(img)' where the object ends up in call position of the
s-expression.

On Fri, May 26, 2017 at 11:54 AM Christopher Howard <
christopher.how...@qlfiles.net> wrote:

> 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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> https://qlfiles.net
>
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> your first post.
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>

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Beginner: let with Java object

2017-05-26 Thread Christopher Howard 
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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