Related: things like these do not work, because of implementation.

    if (false) // <- inserted by me
    for (var ...) { // <- existing code
        ...code...
    }

Too bad, because extra `for`s could be fun...

That's kinda the point, though. Read the comments for that file. ;)

you don't need 2 lines, you only need the one below to overwrite the map function, and leave an open dot :D

map.placeObject(7,4,'exit');var a = {map: {placeObject:function(){}}};a.

thanks for the help ;)