#!/usr/bin/perl
use strict;
use warnings;
use AI::Genetic;
use Data::Dumper;

$|=1;
my $ga = AI::Genetic->new
  (
   -fitness => \&my_fitness,
   -type => 'rangevector'
  );

$ga->init([ [0,10], [0,10], [0,10], [0,10] ]);
$ga->sortIndividuals($ga->people());
# Note that using this instead of sortPopulation does NOT
# cause the same warnings:
# my @populace = sort {$a->score <=> $b->score} @{$ga->people()};

sub my_fitness {
  my $genes = shift;

  my @order = (0,1,2,3);
  my @sorted = sort {
	local $SIG{__WARN__} = sub {print Dumper($a,$b); print @_; sleep 1;};
	$genes->[$a] <=> $genes->[$b]
  } @order;

  my $score = $sorted[1] + 2*$sorted[2] + 3*$sorted[3];

  print "DEBUG: score was $score\n";
  return $score;
}