Matlab: How to check if structure has any fields

	% To check if struct has any fields,
	% fieldnames function can use that return cell with
	% strings representing fields names if any
	%
	s = struct();
	if numel(fieldnames(s)) == 0
	disp('No fields');
	end
	s = struct([]);
	if numel(fieldnames(s)) == 0
	disp('No fields');
	end
	s = struct();

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