With and Without
Fake immutability in an existing list class by adding a "With" and "Without" method
Source
public static class ListExtensions
{
public static TList With<TList, T>(this TList list, T item) where TList : IList<T>, new()
{
TList l = new TList();
foreach (T i in list)
{
l.Add(i);
}
l.Add(item);
return l;
}
public static TList Without<TList, T>(this TList list, T item) where TList : IList<T>, new()
{
TList l = new TList();
foreach (T i in list.Where(n => !n.Equals(item)))
{
l.Add(i);
}
return l;
}
}
Example
List<int> nums = new List<int>() { 1, 2, 3, 4, 5 };
foreach (int i in nums.With(6))
{
Console.WriteLine(i);
}
foreach (int i in nums.Without(3))
{
Console.WriteLine(i);
}
Author: unknown
Submitted on: 8 feb. 2008
Language: C#
Type: System.Collections.Generic.IList<T>
Views: 6507