And that's JavaScript's fundamental problem: it's full of attractive nuisances that have the nasty property of silently doing the wrong thing. 'this', 0=='0'==f

And that's JavaScript's fundamental problem: it's full of attractive nuisances that have the nasty property of silently doing the wrong thing. 'this', 0=='0'==false==[]!=[], global variables by default, objects that are almost-but-not-quite maps, for-in-oops-forgot-hasOwnProperty, etc, etc.