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How to convert Func<T, bool> to Predicate<T>?

Asked 2009-04-08T18:29:41.317
32

Yes I've seen this but I couldn't find the answer to my specific question.

Given a lambda testLambda that takes T and returns a boolean (I can make it either Predicate or Func that's up to me)

I need to be able to use both List.FindIndex(testLambda) (takes a Predicate) and List.Where(testLambda) (takes a Func).

Any ideas how to do both?

c# .net-3.5 lambda
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1 Answer

0

Sound like a case for

static class ListExtensions
{
  public static int FindIndex<T>(this List<T> list, Func<T, bool> f) {
    return list.FindIndex(x => f(x));
  }
}

// ...
Func<string, bool> f = x=>Something(x);
MyList.FindIndex(f);
// ...

I love C#3 ...

answered 2009-04-08T19:20:40.180

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