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Re: Where are you, sdb? I have something fun for your little morons to try

From Melzzzzz <mel@zzzzz.com>
Newsgroups comp.os.linux.advocacy
Subject Re: Where are you, sdb? I have something fun for your little morons to try
Date 2016-12-11 07:52 +0100
Organization albasani.net
Message-ID <20161211075236.12628ebe@maxa-pc> (permalink)
References (11 earlier) <hgjscos993.ab7@rooftop.invalid> <o2imdt$q5o$1@news.albasani.net> <ahjgepg00q.ga@rooftop.invalid> <o2iqn3$5n7$1@news.albasani.net> <ahjgjb00ag.it@rooftop.invalid>

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On Sun, 11 Dec 2016 06:49:30 +0000 (UTC)
deplorable owl <owl@rooftop.invalid> wrote:

> Melzzzzz <Melzzzzz@zzzzz.com> wrote:
> > On 11/12/16 06:55 AM, deplorable owl wrote:  
> >> Melzzzzz <Melzzzzz@zzzzz.com> wrote:  
> >>> On 11/12/16 05:27 AM, deplorable owl wrote:  
> >>>> Melzzzzz <Melzzzzz@zzzzz.com> wrote:  
> >>>>> On 11/12/16 05:00 AM, deplorable owl wrote:  
> >>>>>> Melzzzzz <mel@zzzzz.com> wrote:  
> >>>>>>> On Sat, 10 Dec 2016 19:56:49 +0000 (UTC)
> >>>>>>> deplorable owl <owl@rooftop.invalid> wrote:
> >>>>>>>  
> >>>>>>>> Melzzzzz <Melzzzzz@zzzzz.com> wrote:  
> >>>>>>>>> On 10/12/16 07:25 AM, deplorable owl wrote:  
> >>>>>>>>>> Melzzzzz <Melzzzzz@zzzzz.com> wrote:
> >>>>>>>>>>
> >>>>>>>>>> BTW, what's the proper approach to randomizing such a huge
> >>>>>>>>>> number of values?  (A large enough pool of seconds so that
> >>>>>>>>>> randoms would have a good chance of falling on 100,000
> >>>>>>>>>> different days).
> >>>>>>>>>>
> >>>>>>>>>>  
> >>>>>>>>> You don't have to just filter out dupes ;p
> >>>>>>>>> It is not needed to have 100000k uniques at all.  
> >>>>>>>>
> >>>>>>>> Yeah, but filtering is just to get uniques.  Say you want
> >>>>>>>> 100000 unique days using random second values, minimizing
> >>>>>>>> dups and generating exactly 100000 values, how would you
> >>>>>>>> approach that?  
> >>>>>>>
> >>>>>>> I would generate 100000 days in order, then shuffle.
> >>>>>>>  
> >>>>>>
> >>>>>> Yes, that's easy, but it dodges the pre-generation randomizing
> >>>>>> problem rather than addressing it, and also requires generation
> >>>>>> of a full 8.64 billion numbers then modulo 86400 to get 100000
> >>>>>> unique sequential days before shuffling.  
> >>>>>
> >>>>> Hm, I don't get it ;)
> >>>>> Just create 100k dates and then shuffle, what's the problem?
> >>>>>  
> >>>>
> >>>> It's not really about dates.  It's about the rand problem that
> >>>> arises if you randomize 100,000 time_t values with the goal of
> >>>> 100,000 unique DD-MM-YYYY values.  Consider it generically.
> >>>> Forget that it's a date function, and assume that you have a
> >>>> pool of input values for which output values only change for
> >>>> every 86400 inputs.  You want to get 100,000 random (but
> >>>> hopefully unique) outputs given only 100,000 randomly chosen
> >>>> inputs. How do you randomize your inputs where the input pool is
> >>>> minimum 8.64 billion to guarantee that you *might* get 100,000
> >>>> unique outputs.
> >>>>
> >>>>  
> >>> You first get starting date and ending date. Then generate all
> >>> possible dates in range. Then randomly pick required number of
> >>> dates from that list.. 
> >>
> >> Again, forget that it's dates.  Say you have a step function f(x)
> >> that only changes values for every 86400 values of x (x +/-
> >> integers). You don't get to select random f(x).  You must select
> >> 100000 random x and get 100000 hopefully unique f(x).  What does
> >> your rand routine look like? 
> > Same answer.
> >   
> 
> Did you note this part: "You don't get to select random f(x)" ?
> You must pick 100000 random x, not 100000 random f(x).
> 

It all boils down to same. If you dont have pool of unique numbers to
pick, you can't produce unique numbers... random functions are random...


-- 
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Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-07 12:27 -0500
  Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-07 19:52 +0000
    Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-07 21:28 -0500
      Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-08 05:52 +0000
        Re: Where are you, sdb? I have something fun for your little morons to try chrisv <chrisv@nospam.invalid> - 2016-12-08 07:02 -0600
          Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-08 09:02 -0500
  Re: Where are you, sdb? I have something fun for your little morons to try Adlbifhr Mjduhgfks <am@random.us> - 2016-12-08 00:32 +0000
    Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-07 21:48 -0500
      Re: Where are you, sdb? I have something fun for your little morons to try Adlbifhr Mjduhgfks <am@random.us> - 2016-12-08 14:17 +0000
        Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-08 11:00 -0500
          Re: Where are you, sdb? I have something fun for your little morons to try Steve Carroll <fretwizzer@gmail.com> - 2016-12-08 09:13 -0800
            Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-08 18:41 -0500
              Re: Where are you, sdb? I have something fun for your little morons to try Steve Carroll <fretwizzer@gmail.com> - 2016-12-08 17:32 -0800
                Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-08 21:12 -0500
                Cartoons are easier to read than the Wall Street Journal. Jeff-Relf.Me <@.> - 2016-12-08 20:16 -0800
                Re: Where are you, sdb? I have something fun for your little morons to try Steve Carroll <fretwizzer@gmail.com> - 2016-12-09 09:03 -0800
      Re: Where are you, sdb? I have something fun for your little morons to try Adlbifhr Mjduhgfks <am@random.us> - 2016-12-08 15:49 +0000
        Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-08 11:00 -0500
          Re: Where are you, sdb? I have something fun for your little morons to try Adlbifhr Mjduhgfks <am@random.us> - 2016-12-08 16:24 +0000
            Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-08 18:43 -0500
              Only _results_ matter; i.e.:  What does it do ? Jeff-Relf.Me <@.> - 2016-12-08 19:45 -0800
                Re: Only _results_ matter; i.e.:  What does it do ? flatfish+++ <flatfish@linuxmail.org> - 2016-12-08 22:50 -0500
                I don't need the source code. Jeff-Relf.Me <@.> - 2016-12-08 20:39 -0800
                Re: I don't need the source code. flatfish+++ <flatfish@linuxmail.org> - 2016-12-08 23:48 -0500
                I'm hard to copy, thank God. Jeff-Relf.Me <@.> - 2016-12-08 22:30 -0800
                Re: I'm hard to copy, thank God. flatfish+++ <flatfish@linuxmail.org> - 2016-12-09 01:54 -0500
                Re: I'm hard to copy, thank God. Steve Carroll <fretwizzer@gmail.com> - 2016-12-09 12:30 -0800
                Re: I don't need the source code. Poutnik <poutnik4nntp@gmail.com> - 2016-12-09 07:12 +0100
                Re: I don't need the source code. flatfish+++ <flatfish@linuxmail.org> - 2016-12-09 01:15 -0500
                Re: I don't need the source code. Poutnik <poutnik4nntp@gmail.com> - 2016-12-09 07:27 +0100
                Re: I don't need the source code. flatfish+++ <flatfish@linuxmail.org> - 2016-12-09 01:44 -0500
                Usenet is not CraigsList nor WikiPedia, Reddit. Jeff-Relf.Me <@.> - 2016-12-08 23:00 -0800
                Re: Usenet is not CraigsList nor WikiPedia, Reddit. flatfish+++ <flatfish@linuxmail.org> - 2016-12-09 02:12 -0500
                If/When Cola is being honest, they don't think MicroSoft is "Evil". Jeff-Relf.Me <@.> - 2016-12-08 23:56 -0800
                Re: Usenet is not CraigsList nor WikiPedia, Reddit. Poutnik <poutnik4nntp@gmail.com> - 2016-12-09 08:16 +0100
                Usually, the __DEFAULT__ "Subject:" line isn't best. Jeff-Relf.Me <@.> - 2016-12-08 22:53 -0800
                Re: Usually, the __DEFAULT__ "Subject:" line isn't best. Poutnik <poutnik4nntp@gmail.com> - 2016-12-09 08:19 +0100
                Please lookup the word "Default". Jeff-Relf.Me <@.> - 2016-12-08 23:31 -0800
                Re: Please lookup the word "Default". Poutnik <poutnik4nntp@gmail.com> - 2016-12-09 08:42 +0100
                The parent post. -- Re: Please lookup the word "Default". Jeff-Relf.Me <@.> - 2016-12-09 00:12 -0800
                Re: The parent post. -- Re: Please lookup the word "Default". Poutnik <poutnik4nntp@gmail.com> - 2016-12-09 11:28 +0100
                Threads branch like a tree, SubTopics sprout. Jeff-Relf.Me <@.> - 2016-12-09 03:35 -0800
                Re: Threads branch like a tree, SubTopics sprout. Poutnik <poutnik4nntp@gmail.com> - 2016-12-09 16:18 +0100
                Re: The parent post. -- Re: Please lookup the word "Default". moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-12-09 15:05 +0000
                I want details, Michael Moroney. Jeff-Relf.Me <@.> - 2016-12-09 07:18 -0800
                Re: I want details, Michael Moroney. Steve Carroll <fretwizzer@gmail.com> - 2016-12-09 10:38 -0800
                Re: I want details, Michael Moroney. moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-12-10 04:03 +0000
                I never had to deal with such problems. Jeff-Relf.Me <@.> - 2016-12-09 21:15 -0800
                Re: I never had to deal with such problems. moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-12-11 01:50 +0000
                Re: The parent post. -- Re: Please lookup the word "Default". chrisv <chrisv@nospam.invalid> - 2016-12-09 09:37 -0600
                Re: The parent post. -- Re: Please lookup the word "Default". moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-12-09 20:32 +0000
                Re: I don't need the source code. chrisv <chrisv@nospam.invalid> - 2016-12-09 06:39 -0600
                Re: I don't need the source code. Poutnik <poutnik4nntp@gmail.com> - 2016-12-09 16:19 +0100
                Re: I don't need the source code. Silver Slimer <.m@nsn.s> - 2016-12-09 11:51 -0500
                Re: I don't need the source code. flatfish+++ <flatfish@linuxmail.org> - 2016-12-09 12:07 -0500
                Re: I don't need the source code. Silver Slimer <.m@nsn.s> - 2016-12-09 12:22 -0500
                Re: I don't need the source code. flatfish+++ <flatfish@linuxmail.org> - 2016-12-09 12:28 -0500
                Re: I don't need the source code. moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-12-09 17:52 +0000
                I only have time to read a few select authors, sorry. Jeff-Relf.Me <@.> - 2016-12-09 10:05 -0800
                Re: I don't need the source code. chrisv <chrisv@nospam.invalid> - 2016-12-09 12:26 -0600
                Re: I don't need the source code. Silver Slimer <.m@nsn.s> - 2016-12-09 14:06 -0500
                Re: I don't need the source code. Chris Ahlstrom <OFeem1987@teleworm.us> - 2016-12-09 19:56 -0500
                Re: I don't need the source code. Silver Slimer <.m@nsn.s> - 2016-12-10 09:23 -0500
                Re: Only _results_ matter; i.e.:  What does it do ? fr314159@gmail.com - 2016-12-09 07:17 -0800
                Re: Only _results_ matter; i.e.: What does it do ? DFS <nospam@dfs.com> - 2016-12-12 18:54 -0500
    Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-12 18:39 -0500
  Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <mel@zzzzz.com> - 2016-12-09 03:38 +0100
    Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-09 19:00 +0000
      Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <mel@zzzzz.com> - 2016-12-10 00:33 +0100
        Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-10 05:24 +0000
          Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <Melzzzzz@zzzzz.com> - 2016-12-10 06:54 +0100
            Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-10 06:25 +0000
              Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <Melzzzzz@zzzzz.com> - 2016-12-10 07:28 +0100
                Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-10 19:56 +0000
                Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-10 15:19 -0500
                Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-10 15:23 -0500
                Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-10 20:44 +0000
                Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-10 17:55 -0500
                Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-11 00:02 +0000
                Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-10 19:39 -0500
                C/CPP's "srand( int Seed )" generates an array of (PseudoRandom) int's. Jeff-Relf.Me <@.> - 2016-12-10 23:09 -0800
                Re: C/CPP's "srand( int Seed )" generates an array of (PseudoRandom) int's. deplorable owl <owl@rooftop.invalid> - 2016-12-11 07:23 +0000
                Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-10 19:56 -0500
                Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-10 20:07 -0500
                Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-11 04:07 +0000
                Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-11 00:18 -0500
                Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <mel@zzzzz.com> - 2016-12-11 03:40 +0100
                Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-11 04:00 +0000
                Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <Melzzzzz@zzzzz.com> - 2016-12-11 05:08 +0100
                Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-11 04:27 +0000
                Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <Melzzzzz@zzzzz.com> - 2016-12-11 05:58 +0100
                Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-11 05:55 +0000
                Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <Melzzzzz@zzzzz.com> - 2016-12-11 07:11 +0100
                Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-11 06:49 +0000
                Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <mel@zzzzz.com> - 2016-12-11 07:52 +0100
                Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-11 07:09 +0000
                Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <Melzzzzz@zzzzz.com> - 2016-12-11 08:23 +0100
                Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-11 07:37 +0000
                Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <Melzzzzz@zzzzz.com> - 2016-12-11 08:40 +0100
                Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-11 09:05 +0000
        Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-10 19:41 +0000
          Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <mel@zzzzz.com> - 2016-12-10 20:48 +0100
            Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-10 20:06 +0000
      Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-10 10:32 -0500
        Re: Where are you, sdb? I have something fun for your little morons to try Melzzzzz <mel@zzzzz.com> - 2016-12-10 16:40 +0100
          Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-10 11:03 -0500
            Re: Where are you, sdb? I have something fun for your little morons to try Steve Carroll <fretwizzer@gmail.com> - 2016-12-10 09:26 -0800
              Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-10 12:38 -0500
                Re: Where are you, sdb? I have something fun for your little morons to try Steve Carroll <fretwizzer@gmail.com> - 2016-12-10 09:52 -0800
                Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-10 13:01 -0500
                Re: Where are you, sdb? I have something fun for your little morons to try Steve Carroll <fretwizzer@gmail.com> - 2016-12-10 10:06 -0800
            Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-10 19:38 +0000
              Re: Where are you, sdb? I have something fun for your little morons to try DFS <nospam@dfs.com> - 2016-12-10 19:55 -0500
        Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-10 19:33 +0000
          Re: Where are you, sdb? I have something fun for your little morons to try deplorable owl <owl@rooftop.invalid> - 2016-12-10 20:00 +0000

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