Indexing way to retrieve indices of nonempty elements of a cell array?

Is there an indexing way (I couldn't figure one out) to do what this little function does:

function nonempty = findNonEmpty(cellarray)
  % Find indices of non-empty array elements of cellarray
  % Example:
  %   findNonEmpty({[], {3}, [], [], eye(100)}) returns [2 5]
    nonempty = [];
    for i=1:length(cellarray)
        if ~isempty(cellarray{i})
            nonempty(end+1) = i;        
        end
    end

Answer 1

[Fangjun Jiang]

a={[], {3}, [], [], eye(100)};
b=find(~cellfun('isempty',a))

Answer 2

[David Goldsmith]

Jackpot, thanks!!!

Awesome, I wasn't aware of cellfun (obviously); thanks again!