public static Population <TIndividual> ToPopulation <TIndividual>(this Offspring <TIndividual> offspring)
{
if (offspring is null)
{
throw new ArgumentNullException(nameof(offspring));
}
return(new Population <TIndividual>(offspring.ParentPopulation.Fitness, offspring.ParentPopulation.Random, offspring.Children));
}
public static Offspring <TIndividual> Eagerly <TIndividual>(this Offspring <TIndividual> offspring)
{
if (offspring is null)
{
throw new ArgumentNullException(nameof(offspring));
}
return(offspring.WithChildren(offspring.Children.ToArray()));
}
public static Offspring <TIndividual> WithChildren <TIndividual>(this Offspring <TIndividual> offspring, IEnumerable <TIndividual> children)
{
if (offspring is null)
{
throw new ArgumentNullException(nameof(offspring));
}
if (children is null)
{
throw new ArgumentNullException(nameof(children));
}
return(new Offspring <TIndividual>(offspring.ParentPopulation, offspring.RandomParents, children));
}
public static Offspring <TIndividual> SelectSurvivors <TIndividual>(this Offspring <TIndividual> offspring, int count)
{
if (offspring is null)
{
throw new ArgumentNullException(nameof(offspring));
}
var fitness = offspring.ParentPopulation.Fitness;
var children = offspring.Children
.OrderBy(fitness)
.Take(count);
return(offspring.WithChildren(children));
}
public static Offspring <TIndividual> AddChildren <TIndividual>(this Offspring <TIndividual> offspring, IEnumerable <TIndividual> children)
{
if (offspring is null)
{
throw new ArgumentNullException(nameof(offspring));
}
if (children is null)
{
throw new ArgumentNullException(nameof(children));
}
var c = offspring
.Children
.Concat(children);
return(offspring.WithChildren(c));
}
public static Offspring <TIndividual> Recombine <TIndividual>(this Offspring <TIndividual> offspring, int count, Func <TIndividual, TIndividual, TRandom, TIndividual> recombine)
{
if (offspring is null)
{
throw new ArgumentNullException(nameof(offspring));
}
if (recombine is null)
{
throw new ArgumentNullException(nameof(recombine));
}
var random = offspring.ParentPopulation.Random;
var children = offspring.RandomParents
.Zip(offspring.RandomParents, (a, b) => recombine(a, b, random))
.Take(count);
return(offspring.AddChildren(children));
}
public static Offspring <TIndividual> Mutate <TIndividual>(this Offspring <TIndividual> offspring, int count, Func <TIndividual, TRandom, TIndividual> mutate)
{
if (offspring is null)
{
throw new ArgumentNullException(nameof(offspring));
}
if (mutate is null)
{
throw new ArgumentNullException(nameof(mutate));
}
var random = offspring.ParentPopulation.Random;
var children = offspring.RandomParents
.Select(p => mutate(p, random))
.Take(count);
return(offspring.AddChildren(children));
}