Groups > comp.lang.java.programmer > #3102

Re: Basic prisoner's dilemma?

Date	2011-04-17 23:47 -0700
From	Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: Basic prisoner's dilemma?
References	<d97822e4-ee7c-458d-8818-07007fb714e8@k3g2000prl.googlegroups.com> <iogac0$lnc$1@news.albasani.net> <4dabb5e8$0$55571$c30e37c6@exi-reader.telstra.net> <3c4ead8c-1841-415f-8bbe-f716ab8f33a9@l14g2000pre.googlegroups.com>
Message-ID	<TeOdnbAv6u8TQzbQnZ2dnUVZ_oednZ2d@posted.palinacquisition> (permalink)

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On 4/17/11 10:08 PM, theglazeb wrote:
> [...]  how could make it output random
> DEFECT or COOPERATE? and then following on that, how could I start
> thinking about a Tit for Tat strategy?

   class Prisoner
   {
     private java.util.Random _rnd = new java.util.Random();

     public String randomChoice()
     {
       return _rnd.nextBoolean() ? "DEFECT" : "COOPERATE";
     }

     public String titForTat(String opponentsLastChoice)
     {
       return opponentsLastChoice;
     }
   }

Incorporate those "algorithms" into your ArrayList-based code as needed. 
  For example:

   class PDTitForTatStrategy extends PDStrategy
   {
     private Prisoner _prisoner = new Prisoner();

     public String chooseAction(ArrayList<String> myHistory, 
ArrayList<String> oppHistory)
     {
       return _prisoner.titForTat(oppHistory.get(oppHistory.size() - 1));
     }
   }

Or rework the logic so it's all in one class, or whatever you want to do.

Pete

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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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