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Groups > comp.lang.java.programmer > #33934
| From | Eric Sosman <esosman@comcast-dot-net.invalid> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: Random permutations [was Re: Libraries for sysadmins?] |
| Date | 2016-03-05 13:46 -0500 |
| Organization | A noiseless patient Spider |
| Message-ID | <nbf9c2$9d4$1@dont-email.me> (permalink) |
| References | (4 earlier) <concise-20160304210431@ram.dialup.fu-berlin.de> <nbd7c3$3jp$1@news.albasani.net> <djvt76Fs5qfU2@mid.individual.net> <nbeunm$drn$1@news.albasani.net> <slrnndm9jm.456.avl@login.logic.tuwien.ac.at> |
On 3/5/2016 1:30 PM, Andreas Leitgeb wrote:
> Sebastian <news@seyweiler.dyndns.org> wrote:
>> Am 05.03.2016 12:11, schrieb Robert Klemme:
>>> On 05.03.2016 00:56, Sebastian wrote:
>>>> new Random().ints(1, 50).distinct().limit(6)
>>> Are you sure this has the same probability characteristics as picking
>>> six random items from a list of 49?
>> I think yes, because Random#ints() is evenly distributed.
>
> Maybe similar enough for almost all practical purposes, but
> strictly speaking, the distinct() might pass through a set
> of less than 6 different ints.
>
> Anyone care to calculate the probability of that happening?
> I'm too lazy (and my skill too rusty by now), to do it myself.
Zero.
However, the running time is (in principle) unbounded.
--
esosman@comcast-dot-net.invalid
"Don't be afraid of work. Make work afraid of you." -- TLM
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Libraries for sysadmins? Elena <egarrulo@gmail.com> - 2016-03-04 03:33 -0800
Re: Libraries for sysadmins? Martin Gregorie <martin@address-in-sig.invalid> - 2016-03-04 11:44 +0000
Re: Libraries for sysadmins? egarrulo <egarrulo@gmail.com> - 2016-03-04 12:56 +0100
Re: Libraries for sysadmins? Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-03-04 07:43 -0500
Re: Libraries for sysadmins? Robert Klemme <shortcutter@googlemail.com> - 2016-03-04 18:06 +0100
Re: Libraries for sysadmins? egarrulo <egarrulo@gmail.com> - 2016-03-04 20:30 +0100
Random permutations [was Re: Libraries for sysadmins?] Sebastian <news@seyweiler.dyndns.org> - 2016-03-05 00:56 +0100
Re: Random permutations [was Re: Libraries for sysadmins?] Robert Klemme <shortcutter@googlemail.com> - 2016-03-05 12:11 +0100
Re: Random permutations [was Re: Libraries for sysadmins?] Sebastian <news@seyweiler.dyndns.org> - 2016-03-05 16:41 +0100
Re: Random permutations [was Re: Libraries for sysadmins?] Brixomatic <brixomatic@yahoo.com> - 2016-03-05 19:20 +0100
Re: Random permutations [was Re: Libraries for sysadmins?] Andreas Leitgeb <avl@logic.at> - 2016-03-05 18:46 +0000
Re: Random permutations [was Re: Libraries for sysadmins?] Brixomatic <brixomatic@yahoo.com> - 2016-03-15 19:22 +0100
Re: Random permutations [was Re: Libraries for sysadmins?] Andreas Leitgeb <avl@logic.at> - 2016-03-15 22:30 +0000
Re: Random permutations [was Re: Libraries for sysadmins?] Andreas Leitgeb <avl@logic.at> - 2016-03-05 18:30 +0000
Re: Random permutations [was Re: Libraries for sysadmins?] Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-03-05 13:46 -0500
Re: Random permutations [was Re: Libraries for sysadmins?] Andreas Leitgeb <avl@logic.at> - 2016-03-05 19:40 +0000
Re: Libraries for sysadmins? Robert Klemme <shortcutter@googlemail.com> - 2016-03-05 12:10 +0100
Re: Libraries for sysadmins? Arne Vajhøj <arne@vajhoej.dk> - 2016-03-04 21:42 -0500
Re: Libraries for sysadmins? Arne Vajhøj <arne@vajhoej.dk> - 2016-03-04 21:48 -0500
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