HN Explorer

26 comments

[ 14.9 ms ] story [ 201 ms ] thread
philjr
It would be nice if the languages in the sidebar on the left were in some non-abitrary order, preferably alphabetical :)

apart from that, a definite improvement on the languages http://codepad.org/ supports

Chromium and Firefox 3.5 on Ubuntu just sit there "Loading...waiting for compilation"

onewland
I don't want to test on somebody's server and cause them to have a bad day, but does this thing have proper stack overflow/memory protection?

  #include <stdio.h>
  int evil(int y)
  {
      char *x = (char *) malloc(y);
      return(evil(y+1)-evil(y+2));
  }

  int main(int argc, char **argv)
  {
       int a = evil(1);
       return 0;
  }
onewland
I'm getting an infinite (>5m wait time) "waiting for compilation" message with the above code.

Are you trying to traverse function calls before compilation? You'll eventually run into the halting problem (http://en.wikipedia.org/wiki/Halting_problem) if this is your approach, though there may be a way to determine cases as simple as mine.

gacek
It won't compile ;) (no stdlib.h/string.h)

And it won't crash the server (at least... should not). There is a fixed limit on how much memory a process can allocate. This program will crash, but not because of malloc, just because the recursion gets too deep (stack overflow).

onewland
Maybe it won't compile, but:

  /spoj/c_run: line 5:  3844 Segmentation fault      ./prog
is the error I got, and that doesn't look like a compile error. (Also, just to be pedantic, I had noted the stack overflow possibility in my original post).

http://ideone.com/view/09u9091w9h# is the snippet.

[deleted]
(comment deleted)
est
Great, now all we need is an online IDE that supports editing SVN and GIT directly.
mima
@onewland : feel free to test it ;) it's still in beta version, so any suggestions (even evil ones :D) are welcome!

@est: yeah... :)

@philjr: first ten languages are most popular ones, the rest is in the alphabetical order (between them is a special one - TEXT)

@philjr: we upgrade the servers - till 6 p.m. (CET) (planned)

memetichazard
I'm guessing you're the owner of the site. Question - Is 'Clips' supposed to be CLisp? There is an article about a CLIPS programming language on Wikipedia, but I couldn't find anything else for Common Lisp on your site.
mima
CLIPS != CLisp
kuszi
Yes, CLIPS is CLIPS ;)
olegk
http://codepad.org is better, I don't have to see "Loading... waiting for compilation"
mima
come back in a few hours, sorry for inconvenience
z8000
Is there a description of the sandboxing and watchdogging performed that we can read?

Are said components open source?

I cannot find this information about SPOJ. It is a black box.

japherwocky
yes, properly sandboxing all of those languages would be quite a feat, amirite?

letting lots of people execute arbitrary code in lots of languages on your servers seems like a huge "what could go wrong here?" from a security perspective.

gacek
Actually if you can do it properly for C using off-the-shelf gcc the rest follows - PHP or Java are on a completely different threat level.
gacek
Unfortunatelly for the readers it is closed-source, and part of the security model is obscurity. The core service has been developed for http://spoj.pl - a bit ancient-looking repository of algorithmic problems.
bham
Security by obscurity is not security at all. You should seriously consider opening up the source.

As my great aunt Ada used to say, "more eyeballs are better than your eyeballs."

wastedbrains
I like this and also really like http://codepad.org before it, but all I really want added is an embed feature. So you can post code snippets on your blog, and as people read the examples they can run the code.

Consider this a feature request for either service, it would be great.

kuszi
Please have a look at Scarky (scarky.com) - is it the style of embedding you would accept?
GeoJawDguJin
"But a pastebin like no other in the Internet."

Isn't this pretty much a reimplementation of codepad.org? So that's not entirely accurate...

mima
# run your code on server side in almost 40 programming languages # and do it all with your own input data!
albertcardona
Java fails:

/usr/lib/jvm/sun-jdk-1.6/bin/javac: error while loading shared libraries: libjli.so: cannot open shared object file: No such file or directory

hhjj
C# fails : Mono requires /proc to be mounted.
kuszi
Thank you for inspiring comments and some tricky codes you have submitted to the site - this is also helpfull.