>> I randomly get ClassNotFoundExceptions when I try to compile a file. >> This is a paste from the repl: >> >> Clojure 1.0.0- >> user=> (compile 'app.hello) >> java.lang.RuntimeException: java.lang.ClassNotFoundException: >> app.hello$exec__4 (NO_SOURCE_FILE:0) >> user=> (compile 'app.hello) >> app.hello >> >> I'm really fresh to Clojure, but that strikes me as very odd. I just >> execute the same command twice. But no regularity, before that it >> would fail for 20 or so time in a row. > > I have no idea why it would be random, but perhaps "classes" is not in > your class path?
nah, with the paste from the repl I intended to demonstrate that it worked and didn't work in two succesive invocations of the exact same compile form. I didn't change anything in the environment. I think that it worked in one instance effectively excludes something being wrong with the classpath. > This works for me if I create directories called "app" and "classes" > in my current directory, put your hello.clj into the "app" directory > and then start clojure "." and "classes" in my class path. > > e.g. like: java -cp ".:classes:/path/to/clojure.jar" clojure.main that is my classpath setup as well. I don't think there is the problem. >> ;; file app/hello.clj: >> (ns app.hello (:gen-class) >> (:import java.io.BufferedReader) >> (:import java.io.InputStreamReader)) >> >> (refer 'clojure.core) ;; not sure if this is necessary > > This is not necessary. > > First, you can use (refer-clojure) instead of (refer 'clojure.core). > http://clojure.org/api#toc482 > > Second, you should use: > > (ns ... > (:refer-clojure)) > > instead if you really need to. > > Third, as per http://clojure.org/api#toc397 this happens by default anyway. > > I think the only reason for using (refer-clojure ...) or (ns ... > (:refer-clojure ...)) is if you want to do something like pull in > everything except a few functions like: > > (ns ... (:refer-clojure :exclude (slurp load-file))) Thanks for this dicussion of my code. I really appreciate feedback here, since I'm very new to Clojure. I will read up on the alternative options you mentioned here. Florian -- Florian Ebeling Twitter: febeling florian.ebel...@gmail.com --~--~---------~--~----~------------~-------~--~----~ 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 Note that posts from new members are moderated - please be patient with your first post. 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 -~----------~----~----~----~------~----~------~--~---
