Lee,
You're just making a simple typo. To get the REPL to switch to the
source file's namespace, you have several options:
1) With the point in the source file, press C-c M-p <ENTER>
2) With the point in the REPL, type ,in <ENTER> overtoneproject.core
<ENTER>
3) With the point in the REPL, type (in-ns 'overtoneproject.core)
Your mistake was to not quote overtoneproject.core, which made the
clojure compiler look up the value of the symbol as a Java class
(which it isn't unless you added a :gen-class to the ns form). By
quoting it, in-ns gets the symbol overtoneproject.core, which is what
it uses to look up namespaces:
clojure.core/in-ns
([name])
Sets *ns* to the namespace named by the symbol, creating it if
needed.
Happy hacking,
~Gary
On Jun 21, 11:09 pm, Lee Spector <[email protected]> wrote:
> On Jun 16, 2011, at 11:16 AM, Sam Aaron wrote:
>
> > I just finished making a screencast primarily for new Overtone users on how
> > to get set up with Emacs as a primary editor:
>
> >http://vimeo.com/25190186
>
> > It turns out that this should be pretty useful for Clojure hackers in
> > general as it's really a screencast on how to set up a Clojure environment
> > using Emacs slime, swank and cake. Just s/Overtone/your-project/
>
> > Of course, it's also great if you're interested in making music with
> > programming languages :-)
>
> Sam,
>
> Thanks so much for this. It's quite nice and it worked for me almost without
> a glitch (the one glitch being that I had to move a pre-existing .emacs to
> prevent an error). If I could be excused for briefly looking a gift horse in
> the mouth I'd also say that as a teacher I think it would be even more
> fabulous if someone could put together packages (presumably
> platform-specific packages) that allowed one to do this all in one or two
> steps, rather than five or six... Installing all of the pieces in one
> automated process, and also adding the needed lines to the project.clj files
> etc. Users will want to update/tweak these later, but in the same spirit of
> this overall package I think it'd be nice to have something that works by
> default with as few steps as possible. In any event, I do think that this is
> already quite a nice advance.
>
> I have two (related?) questions about working in a REPL in the resulting
> configuration:
>
> - When I have a split screen with a source file and a REPL I can't seem to
> get the REPL into the namespace of the source file. I can do C-c C-k to
> evaluate the file and that produces overtone output as expected (and printed
> output goes to the REPL), but when I then try to do (in-ns
> overtoneproject.core) in the REPL [overtoneproject.core is the name I used in
> the ns form in the file] I get a ClassNotFoundException.
>
> - I also can't get (load "core"), or any variant that I could think of, when
> typed in the REPL to find the file. When I look at the classpath with (seq
> (.getURLs (java.lang.ClassLoader/getSystemClassLoader))) I see some of my
> project's files there, so it "knows" about the project, but it doesn't find
> my file in the src directory that cake created.
>
> Any pointers would be appreciated.
>
> Thanks,
>
> -Lee
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