public static IEnumerable <TSource> Take <TSource>(this IEnumerable <TSource> source, int count)
{
if (source == null)
{
throw Error.ArgumentNull(nameof(source));
}
if (count <= 0)
{
return(EmptyPartition <TSource> .Instance);
}
IPartition <TSource> partition = source as IPartition <TSource>;
if (partition != null)
{
return(partition.Take(count));
}
IList <TSource> sourceList = source as IList <TSource>;
if (sourceList != null)
{
return(new ListPartition <TSource>(sourceList, 0, count - 1));
}
return(TakeIterator(source, count));
}
public static IEnumerable <TSource> Take <TSource>(this IEnumerable <TSource> source, int count)
{
if (source == null)
{
throw Error.ArgumentNull("source");
}
if (count <= 0)
{
return(new EmptyPartition <TSource>());
}
IPartition <TSource> partition = source as IPartition <TSource>;
if (partition != null)
{
return(partition.Take(count));
}
return(TakeIterator(source, count));
}
public IPartition <TResult> Take(int count)
{
return(new SelectIPartitionIterator <TSource, TResult>(_source.Take(count), _selector));
}
static IPartition <TSource> TakePartitionRange(IPartition <TSource> partition, int startIndex, int endIndex)
{
partition = endIndex == 0 ? EmptyPartition <TSource> .Instance : partition.Take(endIndex);
return(startIndex == 0 ? partition : partition.Skip(startIndex));
}
