That's a pretty awesome hack of JS's (rather insane) semantics. It's probably worth understanding at least the primative examples though if you're a JS programm

That's a pretty awesome hack of JS's (rather insane) semantics. It's probably worth understanding at least the primative examples though if you're a JS programmer, because this actually happens sometimes to expressions you write. For a little bit of insight into why []+[] === '', for example, check this out: http://www.2ality.com/2012/01/object-plus-object.html http://www.2ality.com/2012/01/object-plus-object.html