ArrayExtensions.cs

using Waher.Networking.XMPP.Contracts;
 
namespace NeuroAccessMaui.Extensions
{
    public static class ArrayExtensions
    {
        public static IEnumerable<Attachment> GetImageAttachments(this Attachment[] attachments)
        {
            if (attachments is null)
            {
                return Enumerable.Empty<Attachment>();
            }
            return attachments.Where(x => x.ContentType.StartsWith("image/", StringComparison.OrdinalIgnoreCase));
        }
 
        public static Attachment? GetFirstImageAttachment(this Attachment[] attachments)
        {
            return attachments?.FirstOrDefault(x => x.ContentType.StartsWith("image/", StringComparison.OrdinalIgnoreCase));
        }
 
        public static T[] Join<T>(this T[] Array1, T[] Array2)
        {
            if (Array1 is null)
                return Array2;
            else if (Array2 is null)
                return Array1;
            else
            {
                int c = Array1.Length;
                int d = Array2.Length;
                T[] Result = new T[c + d];
 
                Array1.CopyTo(Result, 0);
                Array2.CopyTo(Result, c);
 
                return Result;
            }
        }
    }
}