public static void ForEach <T>(this IFiniteYielder <T> source, Action <T> action)
{
while (source.HasNext())
{
action(source.Next());
}
}
public static List <T> ToList <T>(this IFiniteYielder <T> source)
{
var rv = new List <T>();
while (source.HasNext())
{
rv.Add(source.Next());
}
return(rv);
}
public T Next()
{
if (!_source.HasNext())
{
throw new InvalidOperationException();
}
++_count;
return(_source.Next());
}
public static bool Contains <T>(this IFiniteYielder <T> source, T item, IEqualityComparer <T> comp)
{
while (source.HasNext())
{
if (comp.Equals(item, source.Next()))
{
return(true);
}
}
return(false);
}
public static int Count <T>(this IFiniteYielder <T> source)
{
int count = 0;
while (source.HasNext())
{
checked { count++; }
source.Next();
}
return(count);
}
public static bool Any <T>(this IFiniteYielder <T> source, Predicate <T> predicate)
{
while (source.HasNext())
{
if (predicate(source.Next()))
{
return(true);
}
}
return(false);
}
public bool HasNext()
{
if (_first)
{
for (int i = 0; i < _count; ++i)
{
if (_source.HasNext())
{
_source.Next();
}
else
{
break;
}
}
_first = false;
}
return(_source.HasNext());
}
public TResult Next() => _fun(_source.Next());
