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Re: Basic prisoner's dilemma?

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From	Lew <noone@lewscanon.com>
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Subject	Re: Basic prisoner's dilemma?
Date	Mon, 18 Apr 2011 13:34:36 -0400
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Daniele Futtorovic wrote:
> Basic tit-for-tat is as follows:
> - if it's the first time you encounter that opponent (this implies you
> keep a 'memory' of previous encounters), cooperate.
> - otherwise, replicate that opponent's last move.
>
> In code (assuming oppHistory contains only the history with "this"):
>
> public String chooseAction(
> ArrayList<String> myHistory, ArrayList<String> oppHistory)
> {
> return oppHistory.isEmpty() ? "COOPERATE"
> : oppHistory.get( oppHistory.size()
                                       - 1
>                                         );
> }
> (or oppHistory.get(0), depending on whether it's used as a FIFO or a LIFO).
>
>
> You can add various tricks, but don't expect to get far with them,
> because tit-for-tat is the evolutionary stable strategy.
>
> If you're interested in the topic apart from the programming aspect, I
> *very* strongly suggest you read Dawkins' "Selfish Gene" and "Blind
> Watchmaker". Even if you're not, by the way -- those are IMHO must-reads.

-- 
Lew
Honi soit qui mal y pense.
http://upload.wikimedia.org/wikipedia/commons/c/cf/Friz.jpg

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Basic prisoner's dilemma? theglazeb <theglazeb@gmail.com> - 2011-04-17 19:51 -0700
  Re: Basic prisoner's dilemma? Lew <noone@lewscanon.com> - 2011-04-17 23:15 -0400
    Re: Basic prisoner's dilemma? Esmond Pitt <esmond.pitt@bigpond.com> - 2011-04-18 13:54 +1000
      Re: Basic prisoner's dilemma? theglazeb <theglazeb@gmail.com> - 2011-04-17 22:08 -0700
        Re: Basic prisoner's dilemma? Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-04-17 23:47 -0700
        Re: Basic prisoner's dilemma? markspace <-@.> - 2011-04-18 00:14 -0700
  Re: Basic prisoner's dilemma? rossum <rossum48@coldmail.com> - 2011-04-18 13:01 +0100
  Re: Basic prisoner's dilemma? Bent C Dalager <bcd@pvv.ntnu.no> - 2011-04-18 13:38 +0000
  Re: Basic prisoner's dilemma? Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2011-04-18 19:22 +0200
    Re: Basic prisoner's dilemma? Lew <noone@lewscanon.com> - 2011-04-18 13:34 -0400
      Re: Basic prisoner's dilemma? Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2011-04-18 21:26 +0200
        Re: Basic prisoner's dilemma? Lew <noone@lewscanon.com> - 2011-04-18 16:33 -0400
          Re: Basic prisoner's dilemma? Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2011-04-18 23:50 +0200
            Re: Basic prisoner's dilemma? Lew <noone@lewscanon.com> - 2011-04-18 18:37 -0400
              Re: Basic prisoner's dilemma? markspace <-@.> - 2011-04-18 15:51 -0700
    Re: Basic prisoner's dilemma? Michael Wojcik <mwojcik@newsguy.com> - 2011-04-19 16:14 -0400

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