Java Challenge(kittybyte.com)

9 pointsby 6ren13 anni fa9 comments

http://www.kittybyte.com/challenge?1

7 comments

Stuck at the combos with this one:

  void combos(String letters) {
      addAnswer(letters);addAnswer("");
      for(int q=1;q<letters.length();q++) {
          combos(letters.substring(q));
          combos(letters.substring(0,q));
      }
  }

It says it's no good, but it doesn't say why :(

6ren13 anni fa

Mouse over the text "Returned the wrong result" at the bottom to see the test results. Move mouse right to view other test results. The background colour of the text indicates fail/pass, murky brown/green vs solid green. (Perhaps red would be better a better indicator for fail.)

For yours, there are 5 tests, and your code passes one (test number 3).

macowar13 anni fa

Just try and compile this simple program:

> println("System");

It gives this error: "At line undefined, the submission failed to compile with the error: Error: Sorry, but you may not use the keyword 'System'"

This tool has a list of blacklisted words that can not appear in your source code.

perimo13 anni fa

Shameless plug: this seems like a good application for Doppio: https://github.com/int3/doppio

The whole JVM lives in the browser, so you don't need to rely on hacks to "sanitize" user programs.

kittybyte13 anni fa

looks really cool, but it seems very slow?

[deleted]13 anni fa

TeeWEE13 anni fa

Challenge accepted!

    \u0052untime r =
    \u0052untime.\u0067\u0065\u0074\u0052untime();
    //println(r.availableProc\u0065ssors() +", " + r.freeMemory());
    //r.exit(1);
    //r.halt(1);

TeeWEE13 anni fa

Ah i still cant get his server down:

    try {
        Cl\u0061ssLoader loader =       Thr\u0065ad.currentThread().getContextCl\u0061ssLoader();           
        Cl\u0061ss cls = loader.getParent().loadCl\u0061ss("java.lang.Sys"+"tem");
        loader.getParent().loadCl\u0061ss("java.lang.reflect.M"+"ethod");
        java.lang.reflect.M\u0065thod m = cls.getM\u0065thod("e"+"xit", int.class);
        m.invok\u0065(Integer.valueOf(1));
        println(m);
    } catch(Exception e) {
        print(e);
    }

chromaton13 anni fa

Other banned strings include "forName", "Class" (uppercase only), and "Method".

aeurielesn13 anni fa

Fishy. If you are trying to prove a point there are definitely better ways to do it.