Select< TSource, TResult >() [2/2]

static IEnumerable< TResult > System.Linq.Enumerable.Select< TSource, TResult > ( this IEnumerable< TSource > source, Func< TSource, TResult > selector )

inlinestatic

Definition at line 7272 of file Enumerable.cs.

    {
        if (source == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
        }
        if (selector == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.selector);
        }
        if (source is Iterator<TSource> iterator)
        {
            return iterator.Select(selector);
        }
        if (source is IList<TSource> source2)
        {
            if (source is TSource[] array)
            {
                if (array.Length != 0)
                {
                    return new SelectArrayIterator<TSource, TResult>(array, selector);
                }
                return Empty<TResult>();
            }
            if (source is List<TSource> source3)
            {
                return new SelectListIterator<TSource, TResult>(source3, selector);
            }
            return new SelectIListIterator<TSource, TResult>(source2, selector);
        }
        if (source is IPartition<TSource> partition)
        {
            IEnumerable<TResult> result = null;
            CreateSelectIPartitionIterator<TResult, TSource>(selector, partition, ref result);
            if (result != null)
            {
                return result;
            }
        }
        return new SelectEnumerableIterator<TSource, TResult>(source, selector);
    }

References System.array, System.Linq.Enumerable.CreateSelectIPartitionIterator< TResult, TSource >(), System.Linq.Enumerable.Empty< TResult >(), System.Linq.selector, System.Linq.source, and System.Linq.ThrowHelper.ThrowArgumentNullException().