public static int GetHashCode <T>(T[] a)
{
if (a == null)
{
return(0);
}
int result = 1;
bool isValueType = typeof(T).GetTypeInfo().IsValueType;
foreach (var item in a)
{
result = 31 * result + (item == null ? 0 :
// LUCENENET specific: if this is a reference type, pass to
// Collections.GetHashCode() in case we have an array of collections
(isValueType ? item.GetHashCode() : Collections.GetHashCode(item)));
}
return(result);
}
/// <summary>
/// Returns the hash code value for this list.
/// <para/>
/// The hash code determination takes into consideration any values in
/// this collection and values of any nested collections, but does not
/// take into consideration the data type. Therefore, the hash codes will
/// be exactly the same for this <see cref="EquatableSet{T}"/> and another
/// <see cref="ISet{T}"/> with the same values (in any order).
/// </summary>
/// <returns>the hash code value for this list</returns>
public override int GetHashCode()
{
return(Collections.GetHashCode(this));
}