public static IEnumerable <T> PickFrom(IEnumerable <T> selection, int howMany, ISelectValue randomness)
{
if (howMany > selection.Count())
{
throw new ArgumentOutOfRangeException("howMany", "Count cannot be more the number of values");
}
var list = selection.ToList();
var randomCandidates = new List <T>();
for (int i = 0; i < howMany; ++i)
{
int randomIndex = randomness.BetweenZeroAnd(list.Count);
T candidateSolution = list[randomIndex];
randomCandidates.Add(candidateSolution);
list.Remove(candidateSolution);
}
return(randomCandidates);
}
public static Fingering CreateFingeringFor(this FingerboardInstrument instrument, Melody piece, ISelectValue randomness)
{
var notes = piece.Notes;
var fingering = new Fingering();
foreach (Note p in notes)
{
var possibleAlternatives = instrument.PositionsFor(p);
int randomIndex = randomness.BetweenZeroAnd(possibleAlternatives.Count - 1);
FingerPosition selected = possibleAlternatives[randomIndex];
fingering.Add(new FingerPosition(selected.Fret, selected.String));
}
return(fingering);
}
