javascript inline scripts should raise an exception when attempting to use undefined vars

Michif

I just used the array.splice method to insert a string into an array of strings like so:

var myArray = ['first', 'second', 'third'];
myArray.splice(2, 0, vars.myString);

vars.myString was not defined so what I ended up with is ['first', 'second', None, 'third'] instead of a four string array.

Would it not make more sense if OS raises an exception if a variable is not defined?

Cheers,

M