A summary of Douglas Crockford's amazing book "JavaScript: The Good Parts". First presented at the Baltimore/DC JavaScript Users Group on 7/7/2009. http://www.meetup.com/baltimore-dc-javascript-users/calendar/10560330/
15. take advantage
• if (x)
• if (myobject.propery)
• if (myobject.property == null) // no, No, NO!
• test for exactly what you want to test for
• ...or not
• KNOW THE FALSY VALUES
undefined, null, false, 0, ‘’, NaN