var doCopy = function () {

// Create set4 with an object property 'obj'

var set4 = {

obj: {}

};

// Create a shallow copy of set4

var copy = Y.merge(set4);

// Add a property to the copy inside of the 'obj' property

copy.obj.addedToCopy = true;

Y.log('After modifying the copy: ');

// The result object is not the same as the original, but

var msg = ('"copy" should NOT be equal to the "original" (false expected): ' + (copy === set4));

// objects in the result object will reference the same object in

// the input object.

msg += '<br><br>copy.obj.addedToCopy should be equal to original.obj.addedToCopy (true expected): ' +

(copy.obj.addedToCopy === set4.obj.addedToCopy);

Y.log(msg);

result.setContent(msg);

};

Y.on('click', doCopy, '#demo_btn2');