public static PizzaPreferences operator +(PizzaPreferences a, PizzaPreferences b)
{
var pref = new PizzaPreferences();
pref.likes = a.likes.Select(x => x).ToList();
pref.likes.AddRange(b.likes);
pref.hates = a.hates.Select(x => x).ToList();
pref.hates.AddRange(b.hates);
return(pref);
}
public override void Run(IEnumerable <string> args)
{
int nlikes = 2;
int nhates = 1;
var maxToppings = int.Parse(args.First());
PizzaPreferences[] prefs;
if (args.Skip(1).First().ToLower() == "random")
{
if (args.Count() >= 4)
{
prefs = PizzaPreferences.Random(int.Parse(args.Skip(2).First()),
nlikes,
nhates,
int.Parse(args.Skip(3).First()));
}
else
{
prefs = PizzaPreferences.Random(int.Parse(args.Skip(2).First()),
nlikes,
nhates);
}
}
else
{
prefs = JsonConvert.DeserializeObject <PizzaPreferences[]>(args.Skip(1).Aggregate((a, b) => $"{a}{b}"), new StringEnumConverter());
}
Console.WriteLine($"Testing FewestPizzas algorithms with max toppings {maxToppings} and preferences {JsonConvert.SerializeObject(prefs, Formatting.Indented, new StringEnumConverter())}");
Compose();
var sw = new Stopwatch();
foreach (var q in pizzaAlgos)
{
string answer = "";
try
{
sw.Restart();
var result = q.Run(maxToppings, prefs);
answer = $"{result}";
}
catch (Exception ex)
{
answer = $" !!! Threw exception with message: {ex.Message}";
}
Console.WriteLine($"{q.GetType().Name} (in {sw.ElapsedMilliseconds} ms) << {answer}");
}
}
public static PizzaPreferences [] Random(int n, int nlikes = 2, int nhates = 1, int randomSeed = int.MaxValue)
{
if (randomSeed == int.MaxValue)
{
randomSeed = Environment.TickCount;
}
var rand = new Random(randomSeed);
Console.WriteLine($"Using random seed {randomSeed}");
var prefs = new PizzaPreferences[n];
var toppings = Enum.GetValues(typeof(PizzaTopping));
foreach (var i in Enumerable.Range(0, n))
{
prefs[i] = new PizzaPreferences();
prefs[i].likes = Enumerable.Repeat <Func <int> >(() => rand.Next(toppings.Length), nlikes).Select(v => (PizzaTopping)toppings.GetValue(v())).ToList();
prefs[i].hates = Enumerable.Repeat <Func <int> >(() => rand.Next(toppings.Length), nhates).Select(v => (PizzaTopping)toppings.GetValue(v())).Where(t => !prefs[i].likes.Contains(t)).ToList();
}
return(prefs);
}
