public void Mutate()
{
int rand = random.Next(1000);
int[] rates = { 10, 140, 15 };
if (rand < rates[0])
{
Exp.Add(Vocab.Random());
}
else
if (rand < rates[0] + rates[1])
{
if (Exp.Count > 1)
{
Exp.RemoveAt(random.Next(0, Exp.Count));
}
}
else
if (rand < rates[0] + rates[1] + rates[2])
{
int index = random.Next(0, Exp.Count);
Exp.RemoveAt(index);
Exp.Insert(index, Vocab.Random());
}
}
public void PutRandom()
{
if (Vocab.vocabs != null)
{
Exp.Add(Vocab.Random());
}
}
public static Vocab Random()
{
Vocab result = null;
if (vocabs != null)
{
result = new Vocab(vocabs[random.Next(vocabs.Length)], random.Next(quantifiers.Length));
}
return(result);
}
public Expression Crossover(Expression other)
{
Expression child = new Expression();
for (int i = 0; i < this.Exp.Count; i++)
{
int rand = random.Next(5);
if (rand < 2)
{
child.Exp.Add(this.Exp[i]);
}
else if (rand < 4)
{
if (i < other.Exp.Count)
{
child.Exp.Add(other.Exp[i]);
}
}
}
child.Exp.Add(Vocab.Random());
return(child);
}
