public static IEnumerable <IEnumerable <T> > Partition <T>(this IEnumerable <T> source, int chunkSize)
{
var enumeratorWithStatus = new EnumeratorWithStatus <T> {
enumerator = source.GetEnumerator()
};
while (enumeratorWithStatus.hasMore)
{
yield return(getChunk(enumeratorWithStatus, chunkSize).ToList());
}
}
private static IEnumerable <T> getChunk <T>(EnumeratorWithStatus <T> enumeratorWithStatus, int chunkSize)
{
while (chunkSize > 0)
{
if (enumeratorWithStatus.enumerator.MoveNext())
{
chunkSize--;
yield return(enumeratorWithStatus.enumerator.Current);
}
else
{
enumeratorWithStatus.hasMore = false;
yield break;
}
}
}
