Linq equivalent for collection contains at least x items; like .Any() but instead .AtLeast(int)

Question

Is there a Linq method to check whether a collection contains at least x items? .Any() is great because as soon as one item is found, it will be true and the pr

Answer 1

You can call Skip for the minimum number minus 1, and then check if there are any left:

public static bool AtLeast(this IEnumerable<T> source, int minCount)
{
    return source.Skip(minCount - 1).Any();
}

Note that for large counts, if your source implements ICollection<T>, this could be significantly slower than using Count. So you might want:

public static bool AtLeast(this IEnumerable<T> source, int minCount)
{
    var collection = source as ICollection<T>;
    return collection == null
        ? source.Skip(minCount - 1).Any() : collection.Count >= minCount;
}

(You might want to check for the non-generic ICollection too.)