/// <summary>
/// Mutation Predicate.
/// Modifies a DNA string by changing one of its bases to be a random new value
/// </summary>
/// <param name="mut_index">
/// The point in which mutation is applied.
/// </param>
/// <param name="randomGene">
/// The function used to supply random Genes
/// </param>
public static Mutant mutate(int mut_index, DNA original, getRandomGeneFunct randomGene)
{
Mutant m;
DNA g_dna;
DNAPartial g_partial;
DNAPartial rest;
Gene g;
g=randomGene();
while (original.Contains(g))
g = randomGene();
g_dna = new DNA();
g_dna.Add(g);
var sp_mut = split(mut_index-1, original);
g_partial = split(0, g_dna).back;
// remove the base at the location that mutation is to occur
DNA back = join(new DNAPartial(), sp_mut.back);
back.RemoveAt(0);
// add mutated item
back = join(g_partial, split(0,back).back);
DNA front = join(new DNAPartial(), sp_mut.front);
// join front, mutation, and rest, lists together
rest = split(0, join(split(0,front).back, split(0, back).back)).back;
m = new Mutant(join(new DNAPartial(), rest));
return m;
}
