population.rs

use std::vec::Vec;
use std::rand::random;
use super::individual::Individual;

pub struct Population<'ind> {
  size: uint,
  individuals: Vec<&'ind mut Individual>
}
// ???
// compiler error: wrong number of lifetime parameters: expected 1 but found 0
impl Population {
  pub fn new(size: uint, genes_size: uint) -> Population {
    Population {
      size: size,
      individuals: Vec::from_fn(size, |i| { Individual::new(genes_size)  })
    }
  }
  // I want to pick a random individual and modify it
  pub fn pick(&self) -> &mut Individual {
    self.individuals.get(random::<uint>() % self.individuals.len())
  }
}