Tom Schuster (2014-12-16T21:05:03.000Z)
d at domenic.me (2015-01-05T20:42:05.255Z)
right now there is no way in normal JS code to replicate the IsConstructor check defined in 7.2.4. IsCallable can be done with "typeof == function". I think this might be useful in some cases and is trivial to implement.