michael@0: // || binds tighter than =>.
michael@0: 
michael@0: var f;
michael@0: f = a => a || 'nothing';  // f = ((a => a) || 'nothing');
michael@0: assertEq(f.length, 1);
michael@0: assertEq(f(0), 'nothing');
michael@0: assertEq(f(1), 1);