No ConvertAll for LinkedList<T>?

Question

Does anyone have an extension method to quickly convert the types in a LinkedList<T> using a Converter<TInput, TOutput>?

I'm a bit surprised, where is the ConvertAll<TOutput>(delegate)?

Answer 1

The ConvertAll equivalent in extension methods for Linq is called Select!

var result = myLinkedList.Select(x => FancyCalculationWith(x))

Answer 2

Depends on what you want to get out of it, but you can use Cast then enumerate through the resulting IEnumerable.

  public class Foo
  {
    ...
  }

  public class Bar : Foo
  {
    ...
  }

  var list = new LinkedList<Bar>();
  .... make list....

  foreach (var foo in list.Cast<Foo>())
  {
      ...
  }

Answer 3

As tvanfosson says it is possible to Cast<T> but if you want to avoid an InvalidCastException you can use the OfType<T> extension method which will silently pass over and items in the list that fail the conversion to the type of the generic type parameter you supply.