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<html><head><meta charset=utf-8 /><title>JS Bin</title><script src="http://code.jquery.com/jquery-1.8.3.min.js"></script></head><body> <div id="logger"></div></body></html> function Foo() { this['c'] = 'c'; this['d'] = 'd';}Foo.prototype = { 'a': 'a', 'b': 'b'};function log(txt) { document.getElementById('logger').innerHTML += txt + '<br>';}for (var i in new Foo) { log(i);}log($.isPlainObject(new Foo));
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