Question

I’m trying to find the index of the first element of an ArrayList whose ‘tag’ property does not equal null.

I thought I could do something to the effect of

ArrayList.IndexOf(p => p.tag != null);

or

ArrayList.IndexOf(*.tag != null);

but neither of these work. Is there a way to use IndexOf with just a property of an object?

Answer 1

Try Array.FindIndex:

Searches for an element that matches
the conditions defined by the
specified predicate, and returns the
zero-based index of the first
occurrence within the entire Array.