4 ms·

Weird Funny Java

• alpb 15y ago
  I'm wondering how did you find a seed for randomString function to produce "hello world" string. That's pretty strange. Could you explain the method for that, please?
  • epaga 15y ago
    Brute force I'd assume...?
  • banthar 15y ago
    The string is split in half. It only takes a couple of seconds to brute-force each part.
    • pdw 15y ago
      Try plugging in 22808277332 and 42028050 for "hacker news".
• deleted 15y ago
  [deleted]
• strictfp 15y ago
  A related quiz: If you are observing a random number generator which seems to just keep on spitting out ones, how long do you have to sample it before you can determine if it's random or not?
  • yxhuvud 15y ago
    You cannot determine that. You can at most determine that the output so far matches a random distribution.
    • esrauch 15y ago
      Sort of. You can test a hypothesis that this is being generated by some nonrandom process and determine with arbitrary confidence that that hypothesis is more likely to be true, which is effectively the same. It's also possible that what we observe to be gravity is a 50/50 random process that has happened to always cause attraction when observed, but it would be so astronomically unlikely that it isn't worth considering.
  • acheron 15y ago
    "That's the problem with randomness: you can never be sure." http://search.dilbert.com/comic/Random%20Number%20Generator http://search.dilbert.com/comic/Random%20Number%20Generator