MATLAB: Access properties from an array of objects as an array

Question

Assume:

1. obj = an object instance of a class
2. obj has a property a such that obj.a = <double>
3. listOfObj = repmat(obj, 10, 1)

I want to search through the set of properties that exists in an array of objects. For example,

find( obj(:).a == 3)

However, that doesn't really work. What are the intelligent approaches?

Answer 1

find([obj.a] == 3)

This assumes that a is scalar for all elements of array obj.