by the way, Tim, I've seen NB before as comments in J. What's it stand for?
On Mon, Jan 12, 2009 at 10:39 PM, e <evier...@gmail.com> wrote: > ohhhhhhhh! all the stuff from listmerge ended up in my-list directly. so > then when listmerge was called on these elements it rightly complained! > Awesome. Lots of good lessons coming out of this. > > I need to learn how to run closure code as a script then. I seem to > remember something about this where you do java -cp clojure.jar > something.something.REPL yourcode.clj . . . . I'll try to find it. I'm glad > I was pretty close. Was gettin' ready to throw in the towel . . . which > could have been good 'cause I have a lot of languages in the queue to try > out. . . but nope. Gonna keep at it for now. I think I need to build an > 800 core machine so I can get an appreciation for it all! > > But I already appreciate all the help. You guys are dedicated! > > Thanks again. > > > On Mon, Jan 12, 2009 at 10:23 PM, Timothy Pratley < > timothyprat...@gmail.com> wrote: > >> >> > I just want to get this out of my system, but I'm getting some class >> cast >> > exception and no useful line number. >> >> In situations like these I find that looking at the entire stack trace >> provides clues. The REPL by default does not print the entire stack >> though I'm sure there is a way to achieve that. However I prefer to >> put the code in the file and run it as a script, which by default >> prints the entire stack and from that you can see what line it occured >> on (search for the first appearance of your filename). Doing so showed >> me that the exception was actually thrown in listmerge, because >> listmerge was passed in two integers instead of two lists, so I looked >> at where you called listmerge, and saw that you called concat >> probabbly expecting it to concat lists, but actually it concats the >> contents of the lists >> >> > (var-set my-list (concat @my-list (listmerge [...@l1] [...@l2])))) >> @my-list)) >> >> Here is a naive solution: >> (var-set my-list (concat @my-list (list (listmerge @l1 @l2))))) >> @my-list) >> >> So in total your code minimally changed is: >> >> (defn msort [toSort] >> (with-local-vars [my-list (for [x toSort] [x]) l1 0 l2 0] >> (while (rest @my-list) >> ; (println @my-list) >> (var-set l1 (first @my-list)) >> (var-set l2 (second @my-list)) >> (var-set my-list (drop 2 @my-list)) >> (var-set my-list (concat @my-list (list (listmerge @l1 @l2))))) >> @my-list)) >> >> user=> (msort [64 45 2 67 1 7]) >> ((1 2 7 45 64 67)) >> >> NB: the good old print out my-list also helps narrow down what is >> happening. >> Again, I'm just providing a fix for your code, not suggesting this is >> the best approach. >> >> >> Regards, >> Tim. >> >> >> >> >> > --~--~---------~--~----~------------~-------~--~----~ 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 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 -~----------~----~----~----~------~----~------~--~---
