How can I split an IEnumerable into groups of IEnumerable [duplicate]

Answer 1

Inspired By @dicegiuy30's implementation, I wanted to create a version that only iterates over the source once and doesn't build the whole result set in memory to compensate. Best I've come up with is this:

public static IEnumerable> Split2(this IEnumerable source, int chunkSize) {
    var chunk = new List(chunkSize);
    foreach(var x in source) {
        chunk.Add(x);
        if(chunk.Count <= chunkSize) {
            continue;
        }
        yield return chunk;
        chunk = new List(chunkSize);
    }
    if(chunk.Any()) {
        yield return chunk;
    }
}

This way I build each chunk on demand. I wish I should avoid the List as well and just stream that that as well, but haven't figured that out yet.