MTP2.0_CSharp/Muchinfo.Common/Fx4.0/Xceed.Wpf.AvalonDock/Extentions.cs

/*************************************************************************************

   Extended WPF Toolkit

   Copyright (C) 2007-2013 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license 

   For more features, controls, and fast professional support,
   pick up the Plus Edition at http://xceed.com/wpf_toolkit

   Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids

  ***********************************************************************************/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;

namespace Xceed.Wpf.AvalonDock
{
    internal static class Extensions
    {
        public static bool Contains(this IEnumerable collection, object item)
        {
            foreach (var o in collection)
                if (o == item)
                    return true;

            return false;
        }


        public static void ForEach<T>(this IEnumerable<T> collection, Action<T> action)
        {
            foreach (T v in collection)
                action(v);
        }
        

        public static int IndexOf<T>(this T[] array, T value) where T : class
        {
            for (int i = 0; i < array.Length; i++)
                if (array[i] == value)
                    return i;

            return -1;
        }

        public static V GetValueOrDefault<V>(this WeakReference wr)
        {
            if (wr == null || !wr.IsAlive)
                return default(V);
            return (V)wr.Target;
        }
    }
}