[Info-vax] [OT] The wonders of Javascript...

[Simon Clubley]

On 2015-03-02, hb <end.of at inter.net> wrote:
> On 03/02/2015 09:28 AM, Simon Clubley wrote:
>> Did your simplified example try referencing an undefined standalone
>> variable or a non-existant member of an object (which is what I
>> was doing) ?
>
> A variable. (I'm not sure what "standalone" should mean in 
> this/Javascript context.) In Javascript, referencing a non-existant 
> member of an object is not an error. The name or property to 
> identify/reference a member of an object is not a variable.
>

Yes, in my example, the undefined reference was supposed to be a property
(which should contain an integer value) of an object instead of how
I loosely called it a variable.

What I meant by standalone variable was something declared as "var test1;"
instead of something which is a property of an object.

BTW, and IMHO, Javascript _not_ throwing an error when you reference a
non-existent property in a maths operation (but instead silently setting
the LHS of the assignment to a NaN) is absolutely insane. There is no
reason why something like that would ever be valid code.

I really hope no-one is using Javascript for safety critical code. :-)

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980s technology to a 21st century world