public static KeyValuePair <int, T> GetRandomElementWithIndex <T>(this ICollection <T> collection)
{
var randomIndex = RandomFactory.GetInstance().Next(collection.Count);
var randomElement = collection.ElementAtOrDefault(randomIndex);
return(new KeyValuePair <int, T>(randomIndex, randomElement));
}
/// <summary>
/// Creates a new instance of <see cref="DynamicParameterProvider"/>
/// </summary>
/// <param name="parameterSetListCapacity">Parameter set list capacity</param>
public DynamicParameterProvider(int parameterSetListCapacity)
{
_random = RandomFactory.GetInstance();
_currentParameterSetIndex = 0;
ParameterSets = GenerateRandomParameters(parameterSetListCapacity);
WinningParameterSets = new List <Tuple <double, double> >();
}
/// <summary>
/// Initializes a new instance of the <see cref="BaseHarmonyGenerator{T}"/> class.
/// </summary>
/// <param name="function">The function.</param>
/// <exception cref="ArgumentNullException">function</exception>
protected BaseHarmonyGenerator(IObjectiveFunction <T> function)
{
ObjectiveFunction = function ?? throw new ArgumentNullException(nameof(function));
Random = RandomFactory.GetInstance();
}
public static T GetRandomElement <T>(this ICollection <T> collection)
{
var randomIndex = RandomFactory.GetInstance().Next(collection.Count);
return(collection.ElementAtOrDefault(randomIndex));
}
public static int GetRandomIndexMinimum <T>(this ICollection <T> collection, int startIndex)
{
return(RandomFactory.GetInstance().Next(startIndex, collection.Count));
}
public static int GetRandomIndex <T>(this ICollection <T> collection)
{
return(RandomFactory.GetInstance().Next(collection.Count));
}